Amazon.com: ACEIRMC 3pcs PCF8575 IO Expander Board Module I2C to 16IO IIC I2C I/O Extension Shield Module 16 bit SMBus I/O Ports for Arduino R3 (3pcs) : Electronics
Amazon.com: RD RD6012W 60V 12A DC DC Step Down Power Supply Whole Set not Assembled (RD6012W+S800 case+ 800W PSU) : Electronics
Amazon.com: SparkFun (PID 14585 Fingerprint Scanner - TTL (GT-521F52) with JST SH Cable : Electronics
Buy One Give One, 81 boards, Blinka on Amazon AWS, and more! #Python #Adafruit #CircuitPython #PythonHardware @circuitpython @micropython @ThePSF @Adafruit
Amazon.com: Waveshare MCP23017 IO Expansion Board I2C Interface Expands 2 Signal Pins as 16 I/O Pins Compatible with 3.3V and 5V Levels : Electronics