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Development Boards

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Environment Science Board for micro: bit (V1.0)
US$122.50
Environment Science Board for micro: bit is designed with highly symbolic trees, houses, and snowy mountains. On a wide and easy-to-use PCB, it integrates many sensor modules of nature and science. Including UV sensor, temperature sensor, humidity sensor, air pressure sensor, sound sensor, color sensor, light sensor, water temperature sensor, TDS water quality sensor, buzzer, OLED display, etc. This kit is rich in knowledge, including a wide range of applications.
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SparkFun Qwiic SHIM for Raspberry Pi
US$2.71
The SparkFun Qwiic SHIM for Raspberry Pi is a small, easily removable breakout that easily adds a Qwiic connector to your Raspberry Pi. The SHIM design allows you to plug directly to the Pi's I2C bus with no soldering required and the thin PCB design allows for it to be sandwiched on your Pi GPIO with other HATs!
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Li-polymer Battery HAT, 5V Output, Quick Charge
US$26.95
The Li-polymer Battery HAT integrates SW6106 power bank management chip, allows providing 5V regulated power supply to your Raspberry Pi or other 5V devices, from a high capacity Li-polymer battery. It will charge the battery as well, supports bi-directional quick charge. Compared with the Li-ion Battery HAT, this HAT utilizes Li-polymer battery with higher capacity, which means longer battery life, and allows higher loads. The size of the HAT is more fit for Raspberry Pi B/A+/B+/2B/3B/3B+/4B.
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Argon ONE: A Decent Aluminum Case for Raspberry Pi 4, with Safe Power Button
US$34.95
Argon ONE Aluminum Case [Pi 4 Applicable]. Make A Shiny Mini-Computer By This Decent Aluminium-Alloy Case Customized For Raspberry Pi 4.
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4G / 3G / 2G / GSM / GPRS / GNSS HAT for Raspberry Pi, LTE CAT4, the Global Version
US$109.95
The SIM7600G-H 4G HAT is a 4G/3G/2G communication and GNSS positioning module, which supports LTE CAT4 up to 150Mbps for downlink data transfer. it is pretty low power consumption. You can connect this 4G module with computer to surf the Internet, or attach it onto Raspberry Pi to enable functions like 4G high speed connection, wireless communication, making telephone call, sending SMS, global positioning, etc.
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ICE Tower CPU Cooling Fan for Raspberry Pi 4 & 3, Super Heat Dissipation
US$34.95
This super ICE Tower CPU Cooling Fan for Raspberry Pi is born for solving heat dissipation problem! Tower structure, 5mm copper tube, multi-layer heat sinks, 7 blades powerful fan, all the above combinations make this super radiator for Raspberry Pi. In the case of overclocking, it can reduce the temperature of the Raspberry Pi from 80℃ to 40℃. Best of all, this super cooling fan support both Raspberry Pi 3 and the new Raspberry Pi 4. In our actual use, we found that Raspberry Pi 4 has a large amount of heat. with the help of this super fan, the powerful performance of the Raspberry Pi 4 will be fully released.
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Assembled Adafruit Feather M0 WiFi - ATSAMD21 + ATWINC1500
US$56.95
Feather is the new development board from Adafruit, and like its namesake, it is thin, light, and lets you fly! We designed Feather to be a new standard for portable microcontroller cores. This is the Assembled Adafruit Feather M0 WiFi w/ATWINC1500 - our take on an 'all-in-one' Arduino-compatible + high speed, reliable WiFi with built in USB and battery charging. Its an Adafruit Feather M0 with a WiFi module.
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4pcs Heatsink Kit for Raspberry Pi 4 Model B
US$1.99

This Heat Sink Cooler Kit For Cooling your Raspberry Pi includes 4 aluminum heat sinks with adhesive backing.

Delivery within 2-3 weeks
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8 Channel 24V to 5V PLC Signal Converter
US$12.09
This 8 channel opto-coupled module converts PLC 24 volt signals to 5 volt logic levels.
Delivery within 2-3 weeks
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RC Models Signal Loss Alarm Module
US$5.49
A simple device that plugs into any servo/Rx port, will detect the loss of Tx signal and emit a loud 85dB alarm.
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SparkFun RedBoard Turbo - SAMD21 Development Board
US$34.16
If you’re ready to step up your Arduino game from older 8-bit/16MHz microcontrollers, the SparkFun RedBoard Turbo is a formidable alternative. At its heart, the RedBoard Turbo uses the ATSAMD21G18, which is an ARM Cortex M0+, 32-bit microcontroller that can run at up to 48MHz. With an impressive 4MB of external flash memory and a UF2 (USB Flashing Format) bootloader, the RedBoard Turbo provides you with an economical and easy to use development platform if you're needing more power than the classic RedBoard.
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SparkFun Qwiic Pro Kit
US$120.30
The Qwiic Pro kit provides you with a RedBoard Turbo, two sensors, two accessory boards, and all the cables you need to start utilizing Qwiic and I2C easily. This kit was designed to allow users to get started with Arduino without the need for soldering or breadboarding. Hooking up a handful of inputs and outputs to a RedBoard has never been so easy. Use the joystick, accelerometer, or proximity sensor, and one small display for outputting text, graphics, or even a microPong game!
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EPZ2019 USB-High Speed EEPROM Programmer
US$24.99

This is a highspeed EEPROM programmer designed to flash and rewrite EEPROMs. The EZP2019 is the upgraded version of our EZP2010 programmer. Unit comes with the programmer, USB Cable and Protoboard for SMD types. The manual, driver and software is found in the CD included in the box.

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2.1-CH 60W Digital Audio Amplifier Board
US$17.55
Its a fully assembled 2.1 channel 60W Amplifier board.
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2-Channel Isolated RS485 Expansion HAT for Raspberry Pi
US$26.99
This is a 2-channel isolated RS485 expansion HAT designed for Raspberry Pi, adopts the SC16IS752+SP3485 solution, with embedded protection circuits such as power supply isolation, ADI magnetical isolation, and TVS diode, etc. It is easy to control the 2-channel RS485 for auto transceiving via SPI interface. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for fields like industrial automation.
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69 - 83