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1. Input voltage range: 4-40V DC; 2. Output voltage range: 1.25-37VDC adjustable; 3. Output current: 2A; 4. Voltmeter range: 0 to 40V, error +/-0.1V; 5. Input reverse polarity protection; Built in output short protection function; 6. Built in thermal shutdown function; 7. Press the rightkey to let the display show the input or output voltage. when the right out led light, it shows output, the left IN led show input.8. Model: LDTR-WG01789. Quantity: 1 piece10. Form Color: Deep Blue11. Material: PCB + electronic components12. Dimensions: 2.36 in x 1.38 in x 0.55 in (6 cm x 3.5 cm x 1.4 cm)13. Weight: 0.74 oz (21 g)14. Packing List: 1 x Module

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Type:Voltage Regulator1. Packaging Electrostatic bag2. It use the same as official R3 board3. Use: Instrument4. Power supply voltage: 5v~9v5. Output voltage: 5V DC voltage output and 3.3V DC voltage output6. Plug in the development board, the driver will be installed automatically7. Select the board in die8. Select the COM port, this can be queried in my computer, just the port inside your development board9. It is best to choose the program that comes with it, PROGRAMMER it in.10. Added pin header, easy to use

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Overview Due to the advantages of ultra-low power consumption, wide viewing angle, and clear display without electricity, it is an ideal choice for applications such as shelf labels and industrial instruments. Features 1. Without backlight, the last content can be displayed for a long time even if it is turned off 2. Ultra-low power consumption, basically only need to refresh the power supply 3. Attached with development resources and manuals (example of Arduin-esp32) Product specifications 1. Working voltage: 3.3V 2. Interface: 3-wire SPI, 4-wire SPI 3. Display color: black, white 4. Grayscale: 2 5. Full refresh time: 8s 6. Refresh power: 26.4mW (typical value) 7. Driver chip: DEPG0213BN ESP32 features: 1. Immersion Gold Craft 2. High cost performance 3. Small size, easy to embed other products 4. Powerful function supports LWIP protocol, Freertos 5. WiFi supports three modes: AP, STA and AP + STA 6. Support Windows system (cygwin and msys32) and Linux system 7. Support Arduino-ide, ESP-IDF, Micropython multiple development environments 8. Support Lua program, easy development

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1. In resistance tester circuit, it is necessary to adjust the potentiometer to balance the resistance tester. Under the influence of temperature, humidity and vibration impact, the position and specifications of the potentiometer will be changed when being used, the system index is also changed. Therefore, to make the system back to the original state it needs to be adjusted, and digital potentiometer module can just solve this problem.2. The digital potentiometer changes in steps or incrementally, and the resistance is of linear change. For example, the resistance range of X9C104 is 40R~1000k, divided into 100 steps, so each increment is 1010R.3. With temperature compensation function: the resistance deviation between endpoints is +/-20%;4. Sliding end data can be kept for a long time, about 100 years;5. With 1% high resistance resolution;6. Working voltage: 5V;7. Total resistance: 100kΩ;8. End voltage: -5~5V;9. Tap number: 100;10. Interface: CS, U/D, INC;11. Resistance increase mode: Linear change;12. Working current: 3mA;13. Package temperature: 8SOIC/-40~85 C;14. Taps will automatically store data when being off.15. Package included: 1 x X9C104 Digital Potentiometer Module

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Features1. Ultra-small 802.11b/g/n Wi-Fi + BT/BLE SoC module2. Low-power dual-core 32-bit CPU for application processors3. Up to 240MHz, up to 600 DMIPS4. Built-in 520 KB SRAM, external 4M PSRAM5. Supports interfaces such as UART/SPI/I2C/PWM/ADC/DAC6. Support OV2640 and OV7670 cameras with built-in flash7. Support for images WiFI upload8. Support TF card9. Support multiple sleep modes10. Embedded Lwip and FreeRTOS11. Support STA/AP/STA+AP working mode12. Support Smart Config/AirKiss One-click distribution network13. Support for serial local upgrade and remote firmware upgrade (FOTA)14. The ESP32-CAM has a very competitive small-size camera module that can operate independently as a minimum system, measuring only 27*40.5*4.5mm, with deep sleep current and a minimum of 6mA.15. ESP-32CAM can be widely used in various IoT applications. It is suitable for home smart devices, industrial wireless control, wireless monitoring, QR wireless identification, wireless positioning system signals and other IoT applications. It is an ideal solution for IoT applications.16. ESP-32CAM is packaged in DIP and can be directly plugged into the backplane for quick production. It provides customers with a highly reliable connection method and is convenient for use in various IoT hardware terminals.17. This product contains the OV2640 Camera Module.Specifications1. Material: FR42. Dimensions: 4 cm x 2.7cm x 0.5 cm3. Weight: 18g4. Module model: ESP32-CAM5. SPI Flash: Default 32Mbit6. RAM: internal520KB+external 4M PSRAM7. Bluetooth: Bluetooth 4.2 BR/EDR and BLE standards8. Wi-Fi: 802.11 b/g/n/e/i9. Support interface: UART, SPI, I2C, PWM10. Support TF card: Maximum support 4G11. IO port: 912. Serial port rate: Default 115200 bps13. Image output format: JPEG (only supported by OV2640), BMP, GRAYSCALE14. Spectrum range: 2412 ~ 2484MHz15. Antenna form: Onboard PCB antenna , gain 2dBi16. Transmit power: 802.11b: 17+/-2 dBm (@11Mbps), 802.11g: 14+/-2 dBm (@54Mbps), 802.11n: 13+/-2 dBm (@MCS7)17. Receiving sensitivity: CCK, 1 Mbps : -90dBm, CK, 11 Mbps: -85dBm, 6 Mbps (1/2 BPSK): -88dBm, 54 Mbps (3/4 64-QAM): -70dBm, MCS7 (65 Mbps, 72.2 Mbps): -67dBm18. Power consumption: Turn off the flash: 180mA@5V19. Turn on the flash and adjust the brightness to the maximum: 310mA@5V20. Deep-sleep: The lowest power consumption can reach 6mA@5V21. Moderm-sleep: Up to 20mA@5V22. Light-sleep: Up to 6.7mA@5V23. Security: WPA/WPA2/WPA2-Enterprise/WPS24. Power supply range: 5V25. Operating temperature: -20 degree C ~ 85 degree C26. Storage environment: -40 degree C ~ 90 degree C, < 90%RH27. Package Included:- 1 x ESP32-CAM Module- 1 x Camera Module OV2640 2MPESP32-CAM Picture Output Format Rate: QQVGA QVGA VGA SVGAJPEG 6 7 7 8BMP 9 9 - -GRAYSCALE 9 8 - -Test environment: camera model: OV2640 XCLK: 20MHz, the module transmits pictures to the computer browser by WiFi.

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Type:Voltage Regulator1. Packaging Electrostatic bag2. It use the same as official R3 board3. Use: Instrument4. Power supply voltage: 5v~9v5. Output voltage: 5V DC voltage output and 3.3V DC voltage output6. Plug in the development board, the driver will be installed automatically7. Select the board in die8. Select the COM port, this can be queried in my computer, just the port inside your development board9. It is best to choose the program that comes with it, PROGRAMMER it in.10. Added pin header, easy to use

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Type:Voltage Regulator1. Packaging Electrostatic bag2. It use the same as official R3 board3. Use: Instrument4. Power supply voltage: 5v~9v5. Output voltage: 5V DC voltage output and 3.3V DC voltage output6. Plug in the development board, the driver will be installed automatically7. Select the board in die8. Select the COM port, this can be queried in my computer, just the port inside your development board9. It is best to choose the program that comes with it, PROGRAMMER it in.10. Added pin header, easy to use

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Electrical characteristics1. The maximum output current: 2 a2. The input voltage: 2 v ~ 24 v3. The maximum output voltage: 28 v4. Efficiency: ＞93%Mechanical propertiesProduct size: 36 mm X 17 mm X 14 mmMethod of useThe module of the IN+ and - after 2~24v, IN adjusting the potentiometer can adjust output voltage, output voltage is greater than the input voltageMatters needing attention1. The input voltage should not exceed the maximum input voltage2. The peak current output current is no more than TV university

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Type:Voltage Regulator1. Packaging Electrostatic bag2. It use the same as official R3 board3. Use: Instrument4. Power supply voltage: 5v~9v5. Output voltage: 5V DC voltage output and 3.3V DC voltage output6. Plug in the development board, the driver will be installed automatically7. Select the board in die8. Select the COM port, this can be queried in my computer, just the port inside your development board9. It is best to choose the program that comes with it, PROGRAMMER it in.10. Added pin header, easy to use

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Features1. Supports NVIDIA Jetson Nano Developer Kit2. 8 Megapixels3. Sensor: IMX2194. Resolution: 3280 × 24645. Lens specifications:- CMOS size: 1/4inch- Aperture (F): 2.2- Focal Length: 1.88mm- Angle of View (diagonal): 120 degree- Distortion: <13.6%- Lens dimensions: 6.5mm x 6.5mm6. 4 screw holes7. Used for attachment8. Provide 3.3V power output9. Dimension: 25mm x 24mm10. Weight: 12gPacking List:1. IMX219-120 Camera x12. 15-pin FFC (opposite sides contact) x1

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1. Working voltage: 5 ～ 12V2. Board size: 29 (mm) x12 (mm)3. Chip: NE555 chip on board4. Resistance: adjustable5. Packing: static bag

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1. Dimensions: 35x16.6x2.5 mm2. Upper limit working current: 3A3. Upper limit instantaneous current: 5A4. Overcharge voltage range: 4.28V +/- 0.05V5. Over discharge voltage range: 2.9V +/- 0.05V6. Quiescent current: less than 3uA7. Charging voltage: 8.4-9V8. Short circuit protection: protectable, delayed self-recovery9. Lithium battery protection board cannot be used for lithium iron phosphate battery, hernia lamp, hand drill battery pack. Electric fish machine battery pack. Please pay attention to the electric bicycle battery pack, children's car battery, 550 or more power motor, 1W fisheye LED, etc., for the above combination purchase10. The described power range is applicable to the following products: massager battery pack, LED lamp backup power supply, 12V electronic products, solar street lamp battery pack, monitoring backup power supply and other products.

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1. Two sets of 3.3V and 5V DC output pins are on board, which is convenient for external use2. The upper and lower two channels are independently controlled, which can be switched to 0V, 3.3V, 5V3. Output current: Less than 700ma4. Output voltage: 3.3V, 5V can be switched5. Input voltage: 6.5-12V (DC) or USB power supply6. Dimensions: 32.2 x 52.8 x 20.7mm

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1. Power supply current: 0-20mA2. Power supply voltage: 0-10V3. Power supply voltage: 7-36V4. Packaging: Static Bag5. Features: Wide supply voltage range, support multiple ranges, high stability, good linearity, high-precision color ring resistance, high accuracy, low temperature drift, high power

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1. Using Bluetooth 5.0 master chip, JL6925A, true stereo 5.0 chip. Good sound quality 2. Support automatically back to connect function, support to decode WAV/APE/FLAC/MP3 files losslessly, support to output stereo. Specifications 1. Power Supply: 3.7-5V 2. SNR: 90dB 3. THD+N: -70dB 4. Crosstalk: -86dB 5. DNR: 91dB 6. Support Profile: A2DP/AVCTP/AVDTP/AVRCP/HFP 7. LOS: >15m Interfaces 1. USB powered: Micro USB 5V power supply 2. 3.7-5V Supply board: External 3.7-5V lithium battery power conversion 3. LED indicator: Bluetooth mode long blue light 4. 3.5mm stereo audio interface: Standard 3.5mm interface, output stereo sound source, plug in headphones, connect amplifiers and other devices Pair Instructions After the power is turned on, the blue indicator lights up and enters the Bluetooth mode; The English a??The bluetooth device is ready to paira?? is displayed, indicating that the Bluetooth mode is entered and waiting for pairing; The a??JH_BTa?? searched by the mobile phone Bluetooth is the device name of the decoding board. Click on the connection, the decoder board prompts "The bluetooth device is connected successfully", indicating that the decoder board and the mobile phone are connected successfully, you can play music.

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1. Type: Shield 2. Mainly Compatible with: Ardunio

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1. This is a cloud intelligent hardware development board kit, simple and cost-effective 2. Use EMC's witty cloud SDK to quickly realize the secondary development 3. The DEMO board can use mobile phone to control the panel mount of RGB colorful lights and display environment brightness by photosensitive resistance through APP of mobile phone 4. Only needs half an hour modification, you can create your own remote control device system.

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Features1. Using Bluetooth 5.0 main control chip, good transmission effect and high stability 2. With button control, there are control up and down music, volume addition and subtraction, playback, pause, switch machine, etc., and reserved high and low level control interfaces, regardless of daily use, and DIY modification, it is very playable 3. Micro 5 Pin interface power supply, ordinary mobile phone charger charging cable can be used. 4. Product use: Bluetooth audio signals from mobile phones, laptops, and tablets can be transmitted to power amplifiers, active speakers and other devices through this Bluetooth audio receiver. The audio interface can also be connected to ordinary headphones with a 3.5mm interface. The headset becomes a Bluetooth headset (without a microphone, voice chat is not supported)Specification1. Power interface: Micro 5 Pin (reserved 2.5mm welding port, this model does not support battery power supply) 2. Input voltage: 3.7V-5V 3. Signal-to-noise ratio: 90DB 4. THD+N: -70DB 5. Crosstalk: -86db 6. DNR: 91dB 7. Transmission protocol: A2DP/AVCTP/AVDTP/HFP 8. Transmission distance: about 10 meters (the shorter the distance, the better the stability) 9. Output interface: 3.5mm stereo (reserved soldering points, you can DIY by yourself) 10 Dimensions: 30mm x 30mm

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Features1. Using Bluetooth 5.0 main control chip, good transmission effect and high stability 2. With button control, there are control up and down music, volume addition and subtraction, playback, pause, switch machine, etc., and reserved high and low level control interfaces, regardless of daily use, and DIY modification, it is very playable 3. Micro 5 Pin interface power supply, ordinary mobile phone charger charging cable can be used. 4. Product use: Bluetooth audio signals from mobile phones, laptops, and tablets can be transmitted to power amplifiers, active speakers and other devices through this Bluetooth audio receiver. The audio interface can also be connected to ordinary headphones with a 3.5mm interface. The headset becomes a Bluetooth headset (without a microphone, voice chat is not supported)Specification1. Power interface: Micro 5 Pin (reserved 2.5mm welding port, this model does not support battery power supply) 2. Input voltage: 3.7V-5V 3. Signal-to-noise ratio: 90DB 4. THD+N: -70DB 5. Crosstalk: -86db 6. DNR: 91dB 7. Transmission protocol: A2DP/AVCTP/AVDTP/HFP 8. Transmission distance: about 10 meters (the shorter the distance, the better the stability) 9. Output interface: 3.5mm stereo (reserved soldering points, you can DIY by yourself) 10 Dimensions: 30mm x 30mm

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