Electronics Modules

1. VCC: power supply interface, can be connected to 3.3V, 5V2. GND: ground3. RGB: signal input4. NC: empty interface, no connection required5. Working voltage: 3.3V/5V6. Module size: 28.7x30mm7. RGB lamp model: TX1812C8. Interface mode: crocodile clip interface, DuPont line interface, PH2.0 cable interface9. The module comes with 8 RGB lights and supports three connection methods: crocodile clips, Dupont wires, and PH2.0 wires10. The user can control it to change into any color through programming to realize the effects of water lamp, marquee lamp, breathing lamp, etc.11. Tutorial materials for Micro:bit, Arduino, and Raspberry Pi will be provided for user reference12. The module is composed of 8 programmable RGB lights. RGB lights are independently addressable full-color light sources combined by integrated circuits and LEDs. Each color of R (red), G (green), and B (blue) is divided into 256 levels of brightness. It has the characteristics of small size, high brightness, programmable, and colorful lights. It is often used in lighting decorations, festival lights, and project indicators

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1. Ranging distance: 0.03-2M, 2-8M, greater than 8M2. Average error: 15mm, 20mm, 30mm3. Overall standard deviation: 5mm, 15mm, 25mm4. Ranging distance: 0.03~25.00m (target surface reflectivity is 80.6%)5. Scanning frequency: 10Hz6. Scanning angle: 360°7. Ranging frequency: 21600Hz8. Angular resolution: 0.167°9. Wavelength: 895-915 nm (Typ 905)10. Communication interface: UART@92160011. Ambient light intensity: 60 KLux12. Power supply: 4.5-5V (typically 5V)13. Power consumption: 1.45W14. Working current: 290mA15. Working temperature: minus 10-50 degrees Celsius16. Service life: 10000H17. Dimensions: 34.8 x 54 x 46.29mm18. Product weight: 46.1 gramsPacking list:-DTOF lidar STL27L x 1-LiDAR driver x 1 with ESP8266 adapter-1m USB Type-A to Type-C cable x 1-11cm PH2.0 to 1.27H cable x 1

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1. Material: ABS/PC2. Ranging distance: .2-8.0m @90% reflectivity (indoor 0klux), 0.2-2.5m @10% reflectivity (indoor 0klux), 0.2-8.0m @90% reflectivity (outdoor 90klux), 0.2 -2.5m @10% reflectivity (outdoor 90klux)3. Accuracy: 6cm@(0.2-3m), 2%@(3-8m)4. Frame rate: UART: 1-250Hz (adjustable, default 100Hz); I2C: 1-100Hz (adjustable)5. Distance resolution: 1cm6. Ambient light tolerance: 70klux7. Light source: VCSEL8. Center wavelength: 850nm9. Eye safety: Class1 (IEC60825)10. Field of view: 2°11. Power supply: 3.7-5.2V12. Average current: 70mA13. Power: 0.35W14. Peak current: 150mA15. Communication level: LVTTL (3.3V)16. Communication interface: UART, I2C, I/O17. Working temperature: minus 10-60 degrees Celsius18. Storage temperature: minus 20-75 degrees Celsius19. Dimensions: 35 x 21.25 x 13.5mm20. Weight: 5 grams

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1. Chip model: VL8172. Transmission speed: 5Gbps (theoretical)3. Input interface: USB-A4. Data cable length: 30cm5. Output interface: 4xUSB3.06. Interface compatibility: USB3.0 and backward compatible with USB2.0 and USB1.17. Supporting equipment: ROS robot/car, Raspberry Pi/Rising Sun RDK/Jetson series motherboards, PC computer, industrial computer8. Compatible systems: Win7/8/10, Linux, MacOS, Ubuntu9. Working voltage: 5V10. Working current: 90mA11. Output current: When the external power supply conditions are met, the total output current of four USB channels can reach 5A, and the output current of single USB channel can reach 1.5A12. External power supply voltage and current: 12V input 2.5A, 24V input 1.35A in the case of output 5V5A (laboratory data)13. External power supply interface: microUSB (5V), DC5.5x2.5 (9V-24V), XH2.54 interface (9V-24V)14. Protection circuit: overcurrent protection, short circuit protection, power reverse connection protection15. Dimensions: 68x60x18.5mm16. Weight: 36.5 grams17. The USB HUB board is specially designed for robot developers, compatible with Raspberry Pi, Jetson NANO series development boards18. Onboard VL817 HUB chip, 4 output USB3.0 ports, three power supply interfaces of micro USB, DC5.5x2.5 and XH2.5419. Support external wide voltage power supply, the total current can support 5A (MAX)20. It can provide more stable data transmission and avoid transmission failure due to insufficient current21. 1 input USB interface, 4 USB3.0 output interfaces, the transmission speed can reach 500MB/S22. Three power supply modes, support 9-24V external voltage input23. Wide range of applications, supporting robots, smart cars, Raspberry Pi, Jetson series boards, computers, etc.24. The USB3.0 HUB expansion board is designed to solve the problems of insufficient USB interface on the motherboard and insufficient power supply caused by the increase of USB peripherals.25. In addition to the USB-A standard data interface power supply, it also supports 5V (micro-USB), 9-24V (DC interface/XH2.54 socket) wide-voltage external power supply to ensure the normal power supply of USB peripherals26. Compatible with Win7/8/10, Linux, Ubuntu, MacOS systems, no driver required, plug and play27. If the USB device needs to be restarted, the device can be restarted by switching the power supply, without plugging and unplugging the damaged interface28. Equipped with VL817 main control chip solution, the main control performance is stable, and the transmission is stable and safe29. Efficient and safe power cooling management chip, using large-size heat sink to ensure stable temperature and safe transmission during high-power use30. 4-way USB device status indicators, the device connection status is clear at a glance

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1. Ranging distance:0.1-12.0m @90% reflectivity (indoor 0klux)0.1-4.0m @10% reflectivity (indoor 0klux)0.1-12.0m @90% reflectivity (outdoor 70klux)0.1~4.0m @10% reflectivity (outdoor 70klux)2. Accuracy: 5cm@(0.1-5m), 1%@(5-12m)3. Frame rate: UART: 1-1000Hz (adjustable, default 100Hz); I2C: 1-100Hz (adjustable)4. Repeatability: 1σ: less than 3cm (@100Hz UART); 1σ: less than 4cm (@100Hz I2C)5. Distance resolution: 1cm6. Ambient light tolerance: 70klux7. Working temperature: minus 20-60 degrees Celsius8. Protection level: IP659. Light source: LED10. Center wavelength: 850nm11. Eye safety: Exemption class (EN62471)12. Field of view: 3.6 degrees13. Power supply: 4.5-5.5V14. Average current: 110mA15. Power: 550mW (low power mode: 100mW)16. Peak current: 140mA17. Communication level: LVTTL (3.3V)18. Communication interface: UART, I2C, I/O19. Material: ABS/PC20. Line length: 30 cm21. Dimensions: 35 x 18.5 x 21mm22. Weight: about 12 grams

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1. 13.3 inches 2K AMOLED touch display2. 178-degree wide viewing angle, excellent display performance3. 2560×1440 high resolution, clearer picture and more details4. With 100% SRGB, 100% DCI-P3 color gamut coverage, making the colors more vivid and delicate5. AMOLED active light-emitting screen, with 3.68 million active light-emitting pixels, with precise light control ability, presenting more vivid colors and images6. The 100,000-level contrast radio has a shocking 100,000-level contrast ratio and a hundred times the performance of light and shade, showing the layers and details of the deep starry sky in front of your eyes7. Unlike ordinary LCD, AMOLED uses active emission technology, each pixel on AMOLED will emit light by itself, resulting in brighter highlights or true black shadows, making it almost close to 0nit pure black8. Capacitive 10-point touch9. Support DDC/CI brightness adjustment10. Full-featured Type-C interface, integrated audio and video transmission, plug and play11. Computer dual-screen collaborative processing12. Dual-track ferrite hi-fi speakers, louder volume, wider range and better sound quality13. Product size: 30.7 x 18.3 x 1 cmPacking list:-Display × 1-HDMI flat cable (1m) x 1-USB-A to USB-C cable (1m) x 1-USB-C to USB-C cable × 1-HDMI to Micro HDMI cable (1m) x 1-5V 3A power adapter × 1-Tripod x 1

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1. 13.3 inches 2K AMOLED touch display2. 178-degree wide viewing angle, excellent display performance3. 2560×1440 high resolution, clearer picture and more details4. With 100% SRGB, 100% DCI-P3 color gamut coverage, making the colors more vivid and delicate5. AMOLED active light-emitting screen, with 3.68 million active light-emitting pixels, with precise light control ability, presenting more vivid colors and images6. The 100,000-level contrast radio has a shocking 100,000-level contrast ratio and a hundred times the performance of light and shade, showing the layers and details of the deep starry sky in front of your eyes7. Unlike ordinary LCD, AMOLED uses active emission technology, each pixel on AMOLED will emit light by itself, resulting in brighter highlights or true black shadows, making it almost close to 0nit pure black8. Capacitive 10-point touch9. Support DDC/CI brightness adjustment10. Full-featured Type-C interface, integrated audio and video transmission, plug and play11. Computer dual-screen collaborative processing12. Dual-track ferrite hi-fi speakers, louder volume, wider range and better sound quality13. Product size: 30.7 x 18.3 x 1 cmPacking list:-Display × 1-HDMI flat cable (1m) x 1-USB-A to USB-C cable (1m) x 1-USB-C to USB-C cable × 1-HDMI to Micro HDMI cable (1m) x 1-5V 3A power adapter × 1-Tripod x 1

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1. Input DC1.8-15V voltage range, applicable current within 2A2. The product is equipped with a self-recovery fuse, which will automatically disconnect when the current is too large, and the fuse will automatically recover after cooling3. Dimensions: length and width 32x32x14 mm4. Net weight: 14 gramsSpecial reminder:- DC motor governor connected to DC power supply- Do not directly connect the household 220V AC, otherwise the damage will be at your own risk!- This is a 2A current governor, the continuous current is greater than 0.5A, the 775 motor, the motor of the childrens car cannot be driven, please dont buy it wrong- It is not recommended to supply power greater than 12V, such as 12V lead-acid batteries, which may cause damage to the governor

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Features:1. A dual serial port device data collector/IoT gateway designed for industrial environments. One RS232 and one RS485 can work simultaneously using one network cable without interfering with each other.2. It integrates multiple functions, including serial port server, Modbus gateway, MQTT gateway, RS232 and RS485 to JSON, etc.3. The other Ethernet port can be used as a network switch or cascade, and the PoE function can be equipped with dual power supply.4. The Ethernet port provides two power supply methods: DC port (outer diameter 5.5mm, inner diameter 2.1mm) and screw terminal.5. The chassis adopts guide rail support, which is small in size, easy to install and cost-effective. 6. Suitable for data collection, IoT gateway, security IoT, smart instrument monitoring and other applications.7. This product is a PoE receiving device (PD) and needs to be connected to a PoE power supply and obtain power from the PSE device to work properly.Product parameters:1. Product type: serial server, Modbus gateway, MQTT gateway2. Basic functions: two-way transparent transmission of data between RS232, RS485 and Ethernet3. Communication interface: RS232 port × 1, RS485 port × 1, Ethernet port × 24. Power supply:TO ETH (B): DC 5.5 power interface, 6~45V DC screw terminalTO POE ETH (B): DC 5.5 power interface, 6~45V DC screw terminal, or PoE interface5. Isolation protection: power isolation, signal isolation6. Ethernet:TO ETH (B)：RJ45TO POE ETH (B): RJ45 with PoE support, IEEE 802.3af compliant10/100M self-negotiating RJ45 connector, 2KV surge protection7. Serial port: Isolated RS232 and RS485 (2 channels can receive and send independently at the same time)8. Baud rate: 300-115200 bps9. Check digit: none, odd, even, mark, space10. Data bits: 5-9 bits11. Flow control: Not applicable12. Protocol: Ethernet, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS13. Configuration: host, browser, device management function library14. Communication method: TCP/IP direct communication, VCOM15. Working mode: TCP server, TCP client (coexisting with TCP server), UDP, UDP multicast16. Working temperature: minus 40 degrees Celsius - 85 degrees Celsius17. Humidity range: 5%-95% relative humidity18. Product size: 78 x 72.5 x 24.2mm19. Weight: 134 grams

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Features:1. A dual serial port device data collector/IoT gateway designed for industrial environments. One RS232 and one RS485 can work simultaneously using one network cable without interfering with each other.2. It integrates multiple functions, including serial port server, Modbus gateway, MQTT gateway, RS232 and RS485 to JSON, etc.3. The other Ethernet port can be used as a network switch or cascade, and the PoE function can be equipped with dual power supply.4. The Ethernet port provides two power supply methods: DC port (outer diameter 5.5mm, inner diameter 2.1mm) and screw terminal.5. The chassis adopts guide rail support, which is small in size, easy to install and cost-effective. 6. Suitable for data collection, IoT gateway, security IoT, smart instrument monitoring and other applications.7. This product is a PoE receiving device (PD) and needs to be connected to a PoE power supply and obtain power from the PSE device to work properly.Product parameters:1. Product type: serial server, Modbus gateway, MQTT gateway2. Basic functions: two-way transparent transmission of data between RS232, RS485 and Ethernet3. Communication interface: RS232 port × 1, RS485 port × 1, Ethernet port × 24. Power supply:TO ETH (B): DC 5.5 power interface, 6~45V DC screw terminalTO POE ETH (B): DC 5.5 power interface, 6~45V DC screw terminal, or PoE interface5. Isolation protection: power isolation, signal isolation6. Ethernet:TO ETH (B)：RJ45TO POE ETH (B): RJ45 with PoE support, IEEE 802.3af compliant10/100M self-negotiating RJ45 connector, 2KV surge protection7. Serial port: Isolated RS232 and RS485 (2 channels can receive and send independently at the same time)8. Baud rate: 300-115200 bps9. Check digit: none, odd, even, mark, space10. Data bits: 5-9 bits11. Flow control: Not applicable12. Protocol: Ethernet, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS13. Configuration: host, browser, device management function library14. Communication method: TCP/IP direct communication, VCOM15. Working mode: TCP server, TCP client (coexisting with TCP server), UDP, UDP multicast16. Working temperature: minus 40 degrees Celsius - 85 degrees Celsius17. Humidity range: 5%-95% relative humidity18. Product size: 78 x 72.5 x 24.2mm19. Weight: 134 grams

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Features:1. Support USB to 2 UART, or USB to 1 UART+1 I2C+1 SPI, or USB to 1 UART+1 JTAG2. Supports 2-channel high-speed UART interface, baud rate up to 9Mbps, with CTS and RTS hardware automatic flow control3. Supports 1-channel I2C interface, which is convenient for operating EEPROM or programming I2C devices such as OLEDs and sensors through the host computer.4. Supports 1 SPI interface and has 2 chip select signal pins, which can control 2 SPI slave devices at different times.5. Supports 1-way JTAG interface and can be used with OpenOCD for debugging and testing (due to limited chip and software function testing, users need to evaluate and test this function by themselves)6. Onboard 3.3V and 5V level conversion circuit, used to switch the working level of the communication interface, with better compatibility7. Onboard resettable fuse and ESD protection circuit provide over-current/over-voltage protection and ensure safe and stable communication.8. Aluminum alloy shell, oxidized matte surface, CNC process opening, sturdy and durable, excellent workmanship9. High-quality USB-B and DC connectors, smooth plugging and unplugging, durable and reliable, with anti-reverse connection protectionProduct parameters:1. Host interface: USB2. Power supply: USB port, 5V3. Working voltage: 3.3V/5V (selected through onboard switch)4. USB:Connector: USB-BInterface protection: resettable fuse, ESD protection5. Serial port:Channel: 2 (red DIP switch needs to be set to M0 mode)Connector: 6PIN IDC connectorBaud rate: 1200bps-9MbpsHardware flow control: CTS and RTS6. I2C:Channel: 1 (red DIP switch needs to be set to M1/M2 mode)Connector: 12PIN IDC connector (the first 4 pins are I2C)7. SPI:Channel: 1 (red DIP switch needs to be set to M1/M2 mode)Connector: 12PIN IDC connector (the last 8 pins are SPI)8. JTAG：Channel: 1 (red DIP switch needs to be set to M3 mode)Connector: 12PIN IDC connector (the last 8 pins are JTAG)9. Product size: 86 x 48 x 27.6mm10. Weight: 170gPacking list:-USB to UART/I2C/SPI/JTAG x1-USB Type A to Type B cable 1.2m x1-12PIN cable 20cm x1-6PIN cable 20cm x2

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Features:1. Expand USB to 4-channel RS485, allowing each channel to communicate concurrently and independently2. Onboard TVS (transient voltage suppressor), effectively suppresses surge voltages and transient peak voltages in the circuit, and protects against lightning and static electricity3. Onboard self-restoring fuse and protection diode ensure stable current/voltage output, provide over-current/over-voltage protection, and improve shock-proof performance4. Onboard RS485 output terminal 120R resistor, enabled/disabled by DIP switch5. Aluminum alloy shell, oxidized matte surface, CNC process opening, sturdy and durable, excellent workmanshipProduct parameters:1. Host port: USB2. Device interface: RS4853. Baud rate: 1200bps-460800bps4. USB:Working voltage: 5VConnector: USB-BProtection: 500mA resettable fuse, ESD protectionTransmission distance: about 5m5.RS485Connector: screw terminalProtection: 600W lightning surge protection, 15KV ESD protectionTransmission distance: Maximum communication distance is about 1200m (low speed, turn on 120R resistor)Transmission method: point-to-multipoint (up to 32 nodes, repeaters are recommended for more than 16 nodes)6. Temperature: minus 40 degrees Celsius - 85 degrees Celsius7. Humidity: 5%RH-95%RH8. Operating system: Win7/8/8.1/10/11, Mac, Linux, Android9. Product size: 86.2 x 48 x 27.2mm10. Weight: 181 gramsPacking list:-USB to 4-way RS485 x1-USB Type A to Type B cable 1.2m x1

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1. Onboard DVI interface, TF card slot and PIO-USB port, compatible with Raspberry Pi 40PIN GPIO header, easy to develop and integrate into products2. RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom3. Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz4. 264KB of SRAM, and 16MB of onboard Flash memory5. Onboard DVI interface can drive most HDMI screens (DVI compatibility required)6. Supports using as a USB host or slave via onboard PIO-USB port7. Onboard TF card slot for reading and writing TF card8. Onboard Lithium battery recharge/discharge header, suitable for mobile scenarios9. USB 1.1 with device and host support10. Drag-and-drop programming using mass storage over USB11. Low-power sleep and dormant modes12. 2 × SPI, 2 × I2C, 2 × UART, 4 × 12-bit ADC, 16 × controllable PWM channels13. Accurate clock and timer on-chip14. Temperature sensor15. Accelerated floating-point libraries on-chip16. 8 × Programmable I/O (PIO) state machines for custom peripheral support17. Product size: 65 x 30mm18. Weight: 12 grams

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1. RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom2. Onboard 3PIN SWD port for connecting the debugged target board3. Standard CMSIS-DAP interface can be used to debug most ARM-based microcontrollers4. Works with OpenOCD and other tools supporting CMSIS-DAP5. Adopts the Raspberry Pi 3PIN Debug Connector Specification6. Onboard 3PIN USB to UART bridge7. Onboard 4PIN I2C port for the testing target board8. Onboard 1.14inch 240×135 pixels 65K color IPS LCD display9. Equipped with plastic case and cables10. Open-source firmware, more convenient to upgrade11. Product size: 61 x 15.86 x 9mm12. Weight: 15g

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Features:1. This is an industrial-grade integrated 802.11b/g/n module that can realize two-way transparent transmission of TTL serial port, WiFi, and network port.2. It integrates multiple functions into one, including serial port server, Modbus gateway, MQTT gateway, UART to HTTPD client, etc.3. Traditional serial port devices or MCU control devices can quickly access WiFi wireless networks through this WiFi module.4. Small size and easy to install.5. Suitable for data collection, IoT gateway, security IoT, smart instrument monitoring and other applicationsProduct parameters:1. Power supply: DC 3.3V2. Power supply method: pin header3. Dimensions: 25 x 40 x 8mm4. Ethernet: 10/100M auto-negotiation (connected through pin header)5. WIFI: Complies with 802.11b/g/n6. Serial port: UART7. Frequency band: 2.412-2.484 GHz8. Wireless network: Station / AP / AP+Station mode9. Security mechanism: WPA-PSK / WPA2-PSK10. Encryption type: TKIP/AES11. Transmission power:802.11b: +19dBm (max @11Mbps)802.11g: +18dBm (max @54Mbps)802.11n: +17dBm (maximum @HT20, MCS7); +17dBm (maximum @HT40, MCS7)12. Receiving sensitivity:802.11b: -89dBm (@11Mbps)802.11g: -81dBm (@54Mbps)802.11n: -73dBm (@HT20, MCS7); -71dBm (@HT40, MCS7)13. Baud rate: 300-460800 bps14. Check digit: none, odd, even, mark, space15. Data bits: 5-9 bits16. Flow control: RTS/CTS17. Protocol: TCP/UDP/ARP/ICMP/DHCP/DNS/HTTP/MQTT18. Configuration: host, browser, serial AT command19. Communication method: TCP/IP direct communication, VCOM20. Working mode: transparent transmission, serial port command, HTTPD Client, Modbus TCP to Modbus RTU21. Operating temperature: -40 to 85 degrees Celsius22. Humidity range: 5% to 95%

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1. Charging mode IN: By setting the upper limit voltage UP and lower limit voltage dn; when the battery voltage is less than or equal to the lower limit voltage dn, the relay is turned on and the charger starts charging the battery; when the battery voltage is greater than or equal to the upper limit voltage UP, the relay is turned off and complete. One-time automatic charging; the relay is turned on and IN flashes, indicating that charging is in progress.2. Discharge mode OUT: By setting the upper limit voltage UP and lower limit voltage dn; when the battery voltage ≥ the upper limit voltage UP, the relay is turned on and discharge starts; when the battery voltage is less than or equal to the lower limit voltage dn, the relay is turned off to complete an automatic discharge function; The relay is turned on and OUT flashes, indicating that it is discharging.3. Charge/discharge time control function: When the set time parameter OP is non-zero, charge/discharge time control is started; when the relay is turned on to start a charge/discharge, the timing starts; when the timing is completed, the relay is automatically disconnected to complete a charge. /Discharge process; if the timing is completed, in charging mode, the detection voltage is less than the lower limit voltage dn or in discharge mode, the detection voltage is greater than the upper limit voltage UP, the charging time control function will be automatically turned off, and H:ER will flash to remind the user that the time parameter setting is incorrect. Reasonable; press any key to stop flashing4. When charging/discharging time control is not turned on, the product will record a complete time. When entering the time display interface, the charging time will flash and display; it will be cleared when exiting the time display interface or the next charging is turned on (relay is turned on).5. Automatic parameter detection: After setting the parameters and exiting, if the lower voltage limit dn ≥ the upper limit voltage up, the system will flash "ERR" as a reminder.6. Discharge conduction forced start time FOP (0~10S): After the relay conduction conditions are met, the relay is forced to conduct (0~10S) and the battery voltage is detected again; this function is mainly for the discharge function, and some test loads are At the moment of conduction, it will be instantly pulled down to the lower limit voltage, causing the relay to be disconnected due to false triggering, and the normal discharge process cannot be carried out.7. Dimensions: 62x57x22mm8. Weight: 51 grams9. Note: This product is a simple voltage controller that turns on and off the output through a relay. It only functions as a switch and cannot transform voltage.

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1. LED brightness adjustment, frequency and duty cycle can be adjusted2. Motor speed adjustment, frequency and duty cycle are adjustable3. Drive the solenoid valve to engage and release, automatically cycle, delay output, cycle number (or infinite cycle) can be set4. Control the on and off of equipment, conduct switch fatigue tests, voltage sag and other tests to verify the reliability of customer equipment5. Delay start load, the delay time can be set, it will always be on or work intermittently after the delay6. Can directly drive LEDs, motors, solenoid valves and other loads7. Two modes can be selected: PWM mode - frequency (continuous), duty cycle, and number of pulses are adjustable; PULSE pulse mode - positive pulse width time, negative pulse width time, power-on delay start time, pulse The number is adjustable8. Equipped with start and stop buttons to control signal output and stop9. Wide voltage input: 3.3-30V, 5.08mm terminal wiring10. Working voltage: 3.3~30V (be careful not to reverse the positive and negative poles, otherwise they may burn)11. Frequency range: 1Hz~150KHz. Generally, 20KHz is selected for motor speed regulation.12. Number of pulses: 1-9999, or infinite (display ‘----’ means infinite)13. Delay output time: 0.000s-9999s, can be set to 1ms (MIN)14. Positive and negative pulse width length: 0.000s-9999s, 1msMIN can be set)15. Output load capacity: less than 8A (MOS switch tube)16. Output amplitude: The amplitude is equal to the supply voltage (OUT+ and V+ modules are directly connected internally)17. Dimensions: 60x32mm18. Weight: 20 grams

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1. On-board MAX485 chip, suitable for RS-485 communication, low power consumption, limited swing rate transceiver2. 5.08 (mm) pitch 2P terminal block on board, convenient RS-485 communication wiring3. Chip all the pins have been cited, you can control the operation through the microcontroller4. Operating voltage: 5V5. Weight: about 4.2 g6. Board size: about 5.5 x 2.5 cm

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1. Scope of application: Suitable for Arduin beginners, Arduin experimental equipment platform, Arduin interactive electronics, Arduin robots, etc.2. Advantages: Many functions, easy operation, powerful driver library support and function updates.3. Disadvantages: It takes up a lot of I/O and has low power when driving four motors at the same time (compared to the version with less Arduin I/O).4. It can drive 4-channel DC motors or 2-channel stepper motors and also drive 2-channel servos. It supports Arduin UNO and Arduin Mega 2560.5. This is a commonly used DC motor drive module, using the 293D chip small current DC motor drive chip. The pins are made Arduin compatible, which also facilitates enthusiasts to quickly develop based on Arduin.6. 2 5V servo motor (servo) ports connected to Arduin’s high-resolution and high-precision timer - no jitter!7. Up to 4 bidirectional DC motors and 4-channel PWM speed regulation (approximately 0.5% resolution)8. Forward and reverse control of up to 2 stepper motors, single/double step control, staggered or micro-stepping and rotation angle control.9. 4-way H-bridge: Each bridge of the L293D chip provides .0.6A (peak 1.2A) current and has thermal power-off protection, 4.5V to 36V.10. The pull-down resistor ensures that the motor remains stopped when powered on.11. Large terminal terminal block makes wiring easier (10 - 22AWG) and power supply.12. With Arduin reset button.13. 2 large terminal external power supply terminal blocks ensure the separation of logic and motor drive power.14. Compatible with Mega, Diecimila, & Duemilanove.

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1. Function: to realize the remote power on, off, restart, forced shutdown, incoming calls automatically turn on the computer2. Support PCI-E slots (pcie x1 x4 x8 x16), and graphics card slots aligned with the PCIE slots can be used3. Use with APP, at present, a cell phone supports binding up to 4 computers4. Real-time display of computer status, easy to use5. APP interface is simple and easy to use6. Easy to connect, realize remote control and office work7. Weight: about 20gNote: electronic module products, you need to have a certain degree of basic electronics

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1. Digital tube display and LCD display version: only temperature control function, without manual control2. Version without display WFT1: with temperature control and manual switch function, can be manually opened and closed remotely, timing, time delay, cycle switch and other settings (timing delay function, need to keep WIFI has been networking), otherwise the time settings are invalidated3. Product power supply: DC6-30V (recommended 24V or less), WFT1 with 5V MICRO-USB power supply port control terminal for the relay passive output, can be turned on and off the DC voltage and 220V AC voltage (current is recommended to be used within 7A)4. With cloud temperature records, switching action WeChat, e-mail notification, local buzzer alarms5. Networking instructions: ensure that the phone has been connected to the WiFi network, must be 24Ghz band, 5Ghz band can not be paired, if your router 2.4Ghz band and 5Ghz band is combined, please reconfigure the router, separate it, select the 2.4G band for pairing6. Size:- WFT1: 65 x 33mm- WT02-W: 79 x 43 x 27mm- WT03-W: 79 x 43 x 27mm7. Weight:- WFT1: 30g- WT02-W: 50g- WT03-W: 53gNote: electronic module products, you need to have a certain degree of electronic foundation

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1. The current size can be set for limiting the output current, constant current drive, battery charging2. Comes with output anti-backflow function, no need to add anti-backflow diode when charging battery3. After undervoltage protection, as long as the input voltage can be restored to start without re-power off, can be restored4. Enlarge the heat sink and copper, high power rectifier diode5. Usage:- As a general lift module with overcurrent protection ability to use- As a battery charger- As a high-power LED constant current driver module6. Note: this module in more than 3A, 35W use, please strengthen the heat dissipationParameters:1. Input voltage: 4.8-30V2. Output voltage: 0.5-30V3. Output current: can work stably at 3A for a long time, and can reach 4A under enhanced heat dissipation4. Output power: 35W with natural heat dissipation, 60W with enhanced heat dissipation5. Conversion efficiency: 88 percent or so6. Short circuit protection: yes7. Operating frequency: 180KHz8. Size: 68 x 37 x 22mm, mounting hole diameter 3mm9. Weight: 38.7g

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Features:1. WAVE ROVER is a four-wheel-drive mobile robot chassis with an all-metal body. It has strong off-road traversing capabilities and shock absorption performance. All codes are open source and can be developed again.2. Supports multiple hosts (Raspberry Pi, Jetson Nano, Jetson Orin Nano, etc.). The host can communicate with the ESP32 slave through the serial port.3. Equipped with four N20 reduction motors and high-quality gearboxes, the mobile robot can travel at high speeds and has strong power.4. Built-in 3S UPS power module, supports 3 18650 lithium batteries (series connection, not included), provides uninterrupted power supply for the robot, and supports charging and power output at the same time.5. Built-in multi-functional robot driver board, based on ESP32, with onboard WIFI and Bluetooth, used to drive serial bus servos, output PWM signals, expand TF card slots, etc.6. WAVE ROVER uses flexible rubber tires, which greatly reduces the impact of complex terrain and easily meets the needs of high-speed driving, shock absorption, and off-roading.7. Comes with a mounting plate that can be used to install hosts (Raspberry Pi 4B, Jetson Nano, Jetson Orin Nano, etc.), LD19/STL-27L lidar, and gimbal cameras, providing more possibilities for secondary development.Product parameters:1. Tire material: nylon wheels, rubber tires2. Body material: 5052 aluminum alloy (2mm thick)3. OLED screen: 0.91 inches4. Chassis height: 33.70mm5. Tire diameter: 80mm6. Tire width: 42.50mm7. Motor: N20 12V 200RPM x 48. Number of driving wheels: 49. Running speed: 1.25m/s10. Vertical obstacle surmounting ability: 40mm11. Drive payload: 0.8kg12. Climbing ability: 22 degrees13. Minimum turning radius: 0m (rotating in place)14. Motor power: 1.5W x 415. Remote control function: WIFI AP/STA16. Upper surface area: 17551 square millimeters17. Communication interface: UART/serial bus servo interface/I2C18. Battery support: 18650 lithium battery × 3 (delivered without battery)19. Overall dimensions: 194×168×100mm20. Weight: 860g

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1. Digital tube display and LCD display version: only temperature control function, without manual control2. Version without display WFT1: with temperature control and manual switch function, can be manually opened and closed remotely, timing, time delay, cycle switch and other settings (timing delay function, need to keep WIFI has been networking), otherwise the time settings are invalidated3. Product power supply: DC6-30V (recommended 24V or less), WFT1 with 5V MICRO-USB power supply port control terminal for the relay passive output, can be turned on and off the DC voltage and 220V AC voltage (current is recommended to be used within 7A)4. With cloud temperature records, switching action WeChat, e-mail notification, local buzzer alarms5. Networking instructions: ensure that the phone has been connected to the WiFi network, must be 24Ghz band, 5Ghz band can not be paired, if your router 2.4Ghz band and 5Ghz band is combined, please reconfigure the router, separate it, select the 2.4G band for pairing6. Size:- WFT1: 65 x 33mm- WT02-W: 79 x 43 x 27mm- WT03-W: 79 x 43 x 27mm7. Weight:- WFT1: 30g- WT02-W: 50g- WT03-W: 53gNote: electronic module products, you need to have a certain degree of electronic foundation

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1. Metal shell + cooling fan, better protection and heat dissipation2. The casing is made of bent steel plate with powder coating process on the surface. The protection level reaches IP30, making it more sturdy and durable.3. Precise hole position design, each cutout is completely aligned with the circuit board interface4. Easy to connect 40PIN GPIO5. Reasonable layout and full use of various interfaces6. Product size: 106 x 79.5 x 31mm7. Weight: 252 gramsPacking list:-Metal case x 1-Cooling fan x 1-Silicone thermal tape (4PCS) x 1-Screw pack x 1

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1. Interface: PH2.02. Can be utilized for lithium battery charging applications powered by voltage sources with limited current output such as solar panels3. Input voltage range: 4.4V-6V (please note the solar panel voltage, support 5V solar panel)4. Constant voltage charging voltage 4.2V5. Can be used as a voltage source6. Internal integrated charging current adaptive module, can automatically adjust the charging current according to the current output capacity of the input voltage source7. In order to activate the deeply discharged battery and reduce power consumption, it adopts trickle charging mode when the battery voltage is low8. Continuous constant current charging current up to 0.99A (1A)9. Constant current/constant voltage/constant temperature charging mode can maximize the charging current and prevent the chip from overheating10. Automatically enter the low-power sleep mode when the power supply voltage drops11. Charging status and end-of-charging status dual indicator outputs12. C/10 end-of-charge detection, automatic re-charging13. Size: 20 x 40mm

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Protection mechanism:1. Input anti-reverse connection: yes2. Output backflow prevention: yes3. Input undervoltage protection: 4.7-30V adjustable, default 4.7V4. Output over-voltage protection: 0-37V adjustable, default 37V5. Output overcurrent protection: 0-5.2A adjustable, default 5.2A6. Output over power protection: 0-82W adjustable, default 82W7. Over-temperature protection, default 100 degrees celsius8. Timeout protection: 0-100H adjustable, default off9. Over capacity protection: 0-9999AH adjustable, default off10. Super energy protection: 0-9999WH adjustable, default offParameters:1. Input voltage: 6.0-36V2. Output voltage: 0.6-36V3. Output current: 0-5.0A4. Voltage accuracy: the error does not exceed 0.5 percent+1 word5. Output power: 80W6. Current accuracy: error of no more than 0.5 percent + 3 words7. Voltage resolution: 0.01V8. Current resolution: 0.001A9. Conversion efficiency: 88 percent or so9. Soft start: yes10. Size: 79 x 43 x 25mmNotes:1. Electronic module for a kind of electronic components, the purchase must have the basis for use2. Please look at the product picture and description before purchase, otherwise it is easy to buy the wrong or cause damage3. After purchase, please use it according to the parameters, otherwise it will be damaged4. Power supply is very important, DC products must be a standard DC voltage, (i.e., a complete rectifier, filtering, voltage regulator), otherwise it can not be used or will cause damage to the product5. Pay attention to the output connected to the battery, capacitor, positive and negative poles do not reverse, reverse direct scrapped6. Connect inductive loads such as fans, motors, etc., start-up current is large, please leave 2-3 times the margin, that is, 35W can only use the current 1-2A or less, the power is about 10W or less7. When boosting, if the input voltage is low, the output will be limited

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1. Torque: 25kg.cm@12V2. Rotation angle: 360 degrees (0-4095)3. Position sensor resolution: 0.088 degrees (360 degrees/4096)4. Institutional restriction angle: no restriction5. Working voltage: 6-14 V (typ. 12V)6. Gear: high-precision metal gear7. No-load speed: 0.167 seconds/60 degrees (60RPM)@12V8. Encoder type: 12-bit magnetic encoder9. ID range: 1-25310. Baud rate: 38400bps-1Mbps (default 1Mbps)11. Feedback: position, load, speed, input voltage, current, temperature12. No-load current: 200mA@12V13. Stalled rotor current: 2.7A@12V14. KT: 9.26kg.cm/A15. Weight: 97 grams

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1. Input voltage range: 6-24V2. Output voltage: 5.2V (Considering the charging line loss, the output terminal is 5.3-5.4V, and the load terminal is 5.1-5.2V)3. Output current: 3A (in the case of no heat sink, the stable output current is 2A)4. DC-DC USB step-down charging module with working indicator, standard contact gold-plated socket, reliable quality, wear-resistant and durable5. Compatible cell phone models: for Android series, iPhone series, Huawei, Xiaomi, Nokia6. Product weight: about 6.2 g7. Product size: about 33 x 33 x 8 mmPrecautions:1. The input voltage can not exceed 24V, otherwise it will lead to chip damage2. The positive and negative poles of the input must not be reversed, otherwise the chip will be damaged3. When powering on, do not touched on the resistors, capacitors, IC feet on the circuit board with your hands, otherwise it may lead to sudden change of output voltage and damage to the device

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1. Module characteristics: non-isolated boost module (BOOST)2. Input voltage: DC8.5V-48V3. Input current: 10A (MAX). Please strengthen heat dissipation if it exceeds 8A.4. Quiescent current: 10mA (when 12V rises to 20V, the higher the output voltage, the quiescent current will increase)5. Output voltage: 10-50V continuously adjustable6. Constant current range: 0.2-8A7. Temperature: -40 to +85 degrees Celsius (the ambient temperature is too high, please enhance heat dissipation)8. Working frequency: 150KHz9. Conversion efficiency: up to 96%10. Overcurrent protection: Yes11. Input reverse connection protection: Yes12. Installation method: 4 3mm screw holes13. Wiring method: Wiring output14. Module size: 70mm long, 36mm wide, 13mm high15. Weight: 50 gramsApplication:1. DIY a regulated power supply, the input is 12V, and the output can be adjusted from 12-50V.2. Power your electronic equipment and set the output value according to your system voltage.3. As a car power supply, power your laptop, PDA or various digital devicesProduct Supply.4. DIY a high-power notebook mobile power supply: equipped with a large-capacity 12V lithium battery pack, your notebook can shine wherever you go.5. Solar panel voltage stabilization.6. Charge batteries, lithium batteries, etc.

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1. Voltage range: DC 6V-28V2. Current range: within 3A3. Weight: about 22.6 g4. Size: about 3.2 x 5 x 1.5 cmPrecautions:1. Please make sure the power supply is off before attempting to wire the controller2. Connect the DC motor governor to DC power supply, not directly to household 220V AC power supply, otherwise it will damage the governor3. Pay attention to this is not a power module, must be connected to the motor in order to speed, not connected to the motor multimeter output did not change4. Connect the motor can not be divided into positive and negative, when the running direction is inconsistent with the expectation, you can adjust the wire sequence to change the direction5. Do not connect the positive and negative power load reversed, which will damage the controller

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1. Support network: quad-band network2. Operating voltage: 3.7-4.2V (current peak 1A, please do a good job)3. Serial port is TTL serial port, can be directly linked with the microcontroller4. Module power-on automatic boot, automatic network search5. Board all the way signal indicator (signal slow flash, no signal fast flash)6. Full machine chip processing, reflow soldering, stable performance, power supply can be directly powered by lithium batteries7. Weight: about 5.4 g8. Module size: about 2.5 x 2.3 cm

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Product features:1. Adopts FT232BL chip with external EEPRON (93C46)2. Support Windows 103. Support 3 power supply modes: 5V external power supply, 3.3V external power supply, external power supply (requires 3.3V-5V)4. With 3 LEDs: TXD LED, RXD LED, POWER LED5. GND, RXD, TXD, 3V3, 5V: using a curved pin pin out6. The rest of the function PIN: reserved pads CTS, RTSInstructions for use: (to access the MCU as an example)1. GND: connected to GND2. RXD: connect to MCU.TX (Signal flow: MCU.TX - FT232 - PC.RX)3. TXD: connect to MCU.RX (signal flow: PC.TX - FT232 - MCU.RX)4. 3V3/5V: output 3.3V or 5V (the module is powered by USB, the jumper cap must be jumped to 3.3V or 5V)5. RTS: connect to MCU.CTS (signal flow: PC.RTS - FT232 - MCU.CTS)6. CTS: connect to MCU.RTS (Signal flow: MCU.RTS - FT232 - PC.CTS)

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1. Support network: quad-band network2. Operating voltage: 3.7-4.2V (current peak 1A, please do a good job)3. Serial port is TTL serial port, can be directly linked with the microcontroller4. Module power-on automatic boot, automatic network search5. Board all the way signal indicator (signal slow flash, no signal fast flash)6. Full machine chip processing, reflow soldering, stable performance, power supply can be directly powered by lithium batteries7. Weight: about 5.4 g8. Module size: about 2.5 x 2.3 cm

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Product features:1. Adopts FT232BL chip with external EEPRON (93C46)2. Support Windows 103. Support 3 power supply modes: 5V external power supply, 3.3V external power supply, external power supply (requires 3.3V-5V)4. With 3 LEDs: TXD LED, RXD LED, POWER LED5. GND, RXD, TXD, 3V3, 5V: using a curved pin pin out6. The rest of the function PIN: reserved pads CTS, RTSInstructions for use: (to access the MCU as an example)1. GND: connected to GND2. RXD: connect to MCU.TX (Signal flow: MCU.TX - FT232 - PC.RX)3. TXD: connect to MCU.RX (signal flow: PC.TX - FT232 - MCU.RX)4. 3V3/5V: output 3.3V or 5V (the module is powered by USB, the jumper cap must be jumped to 3.3V or 5V)5. RTS: connect to MCU.CTS (signal flow: PC.RTS - FT232 - MCU.CTS)6. CTS: connect to MCU.RTS (Signal flow: MCU.RTS - FT232 - PC.CTS)

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Product features:1. Adopts FT232BL chip with external EEPRON (93C46)2. Support Windows 103. Support 3 power supply modes: 5V external power supply, 3.3V external power supply, external power supply (requires 3.3V-5V)4. With 3 LEDs: TXD LED, RXD LED, POWER LED5. GND, RXD, TXD, 3V3, 5V: using a curved pin pin out6. The rest of the function PIN: reserved pads CTS, RTSInstructions for use: (to access the MCU as an example)1. GND: connected to GND2. RXD: connect to MCU.TX (Signal flow: MCU.TX - FT232 - PC.RX)3. TXD: connect to MCU.RX (signal flow: PC.TX - FT232 - MCU.RX)4. 3V3/5V: output 3.3V or 5V (the module is powered by USB, the jumper cap must be jumped to 3.3V or 5V)5. RTS: connect to MCU.CTS (signal flow: PC.RTS - FT232 - MCU.CTS)6. CTS: connect to MCU.RTS (Signal flow: MCU.RTS - FT232 - PC.CTS)

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1. Charging indication: the charging display will show IN letters2. Output load indication: long press the LED button after connecting the load, the output will start, the display will show OUT letters and the relative output voltage and current 5V1A or 5V2.1A3. Protection function: the protection circuit of the boosted lithium battery has been integrated to prevent over-discharge, overcharge and overload4. Note: B+ and B- connected to the boosted battery must not be reversed, reverse must burn, can be connected to a lithium-ion battery can also be connected in parallel with a number of lithium-ion battery5. Capacity of not more than 200,000 mAh, voltage 3-4.2V can be used, lithium positive pole connected to B +, lithium negative pole connected to B-6. Size: about 5.8 x 2.7 x 1.5 cm

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1. 14 digital input/output ports: RX, TX, D2-D132. 8 analog input ports: A0-A73. 1 pair of TTL level serial transceiver ports: RX/TX4. 6 PWM ports: D3, D5, D6, D9, D10, D115. Clock frequency: 16MHz6. Using Atmel Atmega328P-AU microcontroller7. Support serial port download, support external 3.3V-12V DC power supply, support 9V battery power supply.8. The professional version of Mini Pro is a microcontroller board which has 14 digital input/output pins (6 of which can be used as PWM outputs), 8 analog inputs, a 16MHz resonator, a reset button, and mounting holes pin header9. Size: about 33.3 x 18 mm

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1. 14 digital input/output ports: RX, TX, D2-D132. 8 analog input ports: A0-A73. 1 pair of TTL level serial transceiver ports: RX/TX4. 6 PWM ports: D3, D5, D6, D9, D10, D115. Clock frequency: 16MHz6. Using Atmel Atmega328P-AU microcontroller7. Support serial port download, support external 3.3V-12V DC power supply, support 9V battery power supply.8. The professional version of Mini Pro is a microcontroller board which has 14 digital input/output pins (6 of which can be used as PWM outputs), 8 analog inputs, a 16MHz resonator, a reset button, and mounting holes pin header9. Size: about 33.3 x 18 mm

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Feature1. This aluminum heat sink is to cool down the board and make it operate safely2. Reducing the risk of hardware failure because of overheating. Various MOS tube3. Electronic Audio and Video, converter, circuit board, Power IC, Transistor etcSpecification1. Quantity of blade: 242. Material: Aluminum3. Color: Silver4. Blade thickness: 1mm5. Base plate thickness: 2mm6. Size: 150 x 60 x 25mm7. Package included:- 1 x Aluminum heat sink 150 x 60 x 25mm

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1. Support I2C protocol2. With backlight power control, you can set whether to connect the backlight power through the jumper cap. Plug in the jumper cap to connect the backlight power, unplug the jumper cap to disconnect the backlight power3. The contrast can be adjusted. Rotate the blue potentiometer to increase clockwise and decrease counterclockwise. The potentiometer is designed on the front, which is convenient for customers to adjust freely anytime and anywhere4. Modules can be cascaded, up to 8 can be cascaded. Modify the device address by shorting A0/A1/A2. The default address is 0x275. Weight: 5g6. Size: 41.5x19x15.3mm8. Power supply voltage: 2.5-6v9. Note: LCD screen is not included10. Delivery list: one IC module (pearl cotton + anti-static packaging

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1. Input voltage: DC 3.2~40V2. Output voltage: 1.25~35V3. Output current: 3A4. Output ripple: Less than 30mv5. Switching frequency: 65Khz6. Working temperature: -45 to 85 degrees Celsius7. Size: 43x21x14mm8. Note: This is a step-down module, and the input voltage needs to be higher than the output voltage. The output current is greater than 2.5A (or the output power is greater than 10W), please add a heat sink to work for a long time

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1. Two-wire car voltmeter + 5.0V USB charging combo2. High-performance, multi-purpose, intelligent and user-friendly design3. If you don’t need to enable the switch, just disconnect the pointed line4. Ultra-wide range of voltmeter: DC4. 5~40V5. The output current capacity of 5.0V, 2A is enough to meet various USB devices, and the voltage is very stable. This module is short-circuited by D+D- by default, which is compatible with most mobile phone charging, and reserves the installation position of various mobile phone identification resistors. , If you need to add identification resistance, please cut off the wire connecting D+ D-6. Purpose: Ultra-wide input voltage, can be used for cars, battery cars, motorcycles, used to monitor the battery voltage, timely grasp the battery status, can be used for various voltage measurement purposes7. Note: The power module will become hot during normal use. If you are mindful of this heat or are sensitive to heat, please take it carefully.8. Weight: 13g9. Size: 58x21x10mmModule performance and highlights:1. The output current capacity of 5V/2A (note: when the input voltage is 6.5~40V, the output voltage of 5.0V can be stabilized)2. With reverse connection protection, reverse connection will not burn3. With over-current and over-temperature protection4. With USB power indicator5. With wiring terminals, easy to access the line6. High efficiency, low rippleModule instructions:After the module is powered on, the voltage can be detected in real time. When you need to charge mobile phones, Ipads, MP3s and other digital products, just touch the "output enable" button. At this time, the USB power indicator lights up and the USB outputs 5.0V voltage; When you need to turn off the digital tube, touch the "low power consumption" button, and the module enters the ultra-low power standby mode, and the USB output is also turned off accordingly.

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1. Type: Voltage Regulator IC2. Conversion efficiency: 96%3. Features: High power, high efficiency, low ripple, with power indicator, free heat sink4. Module nature: Non-isolated step-down module (BUCK)5. Input voltage: 4-38V (please try not to exceed 38V for input)6. Output voltage: 1.25-36V continuously adjustable7. Output current: 0-5A8. Output power: 75W9. Working temperature: -40 to 85 degrees Celsius10. Working frequency: 180KHz11. Wiring mode: welding, V-IN is input, V-OUT is output12. Load regulation rate: Input 24V, output 12V, measured when the load changes from 1 to 4.5A13. Voltage adjustment rate: When output 12V, 4A, when the voltage changes from 18~32V14. Short circuit protection: Limit current 8A15. Over-temperature protection: Automatically shuts off the output after over-temperature16. Installation method: 2 3mm screws17. Application range: Step-down fields where the input voltage is higher than the output voltage, such as batteries, power transformers, DIY adjustable stabilized power supplies, 24V car pen meter power supplies, industrial equipment step-down, 12V to 3.3V, 12V to 5V, 24V to 5V, 24V to 12V, 36V to 24V, etc.18. Dimensions: 54x23x15mm

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1. Power supply current: 5A2. Input voltage: 5-32V3. Output voltage: 0.8-30V4. Switching frequency: 300KHz5. Working temperature: -40 to 85 degrees Celsius6. Size: 51x26.3x14mm7. Note: The IN- (input negative), IN+ (input positive), OUT- (output negative), and OUT+ (output positive) marked on the module must be connected correctly, otherwise the module may be damaged.Features:1. The module uses imported high-quality chips, with high efficiency (95% higher), and low heat generation, which can reach 5A current. At the same time, it cooperates with the original TI op amp to control the output current, so that the overall output is very stable.2. This module uses the original Sanyo filter capacitor with low ESR, which can make the ripple voltage as low as 50mV3. This module uses machine placement and reflow soldering. At the same time, each module undergoes a two-hour aging test before shipment to ensure high reliability.4. This module is an adjustable step-down module, and the output voltage can be changed by adjusting the blue adjustable resistor on the module. The input and output voltage difference is 1V, and the small voltage can output 0.8V.Battery charging method:1. Determine the float voltage and charging current of the rechargeable battery you need, and the input voltage of the module;2. Adjust the constant voltage potentiometer to adjust the output voltage to about 5V.3. Measure the output short-circuit current with the 10A current block of a multimeter, and adjust the constant current potentiometer to make the output current reach the predetermined charging current value;4. The default shipping current of the charging lamp is 0.1 times the charging current (constant current value).5. Adjust the constant voltage potentiometer to make the output voltage reach the float voltage;6. Connect the battery and try charging.(Steps 1, 2, 3, 4, and 5 are for the module input to connect to the power supply, and the output does not connect to the battery without load.)

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1. Applicable to various platforms such as 51/AVR/AVR/ARM2. Using high current relay, AC250V/10A, DC30V/10A3. Independent wiring of the contact part, safe and reliable4. Standard interface, which can be expanded on various development boards5. With fixing screw holes for easy installation6. Size: 138x56x19.3mm

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1. Purpose: 3 digital audio power amplifier2. Output voltage: 8-24v3. Power amplifier type: Class D4. Output power: 20w5. Output impedance: 4-8 ohms6. Protection: output short circuit protection, overheating protection, function self-recovery7. Module size: 43x55x14mm

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1. Features: Higher copper content, good heat dissipation performance, strong current stability2. Manufacturing process: SMT placement machine manufacturing, non-manual welding, higher yield rate, more stable performanceRemarks:1. A single-head printer requires 4 A4988 modules.2. A set of dual-nozzle printer requires 5 A4988 modules.4. Delivery list: A4988 module x 1, heat sink aluminum sheet x 15. Matters needing attention: Please do not plug and unplug the motor and drive when the power is on, which will easily cause the drive to burn out; also do not adjust the current when the motor is running. The correct way is to first disconnect the power supply, unplug the motor, and then power on again, adjust the potentiometer, and measure the voltage on the potentiometer until the measured voltage is the same as expected. Do not plug in the reverse drive, otherwise it will burn out the drive and even the motherboard

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