Amazon.com: HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B : Electronics
Amazon.com: XICOOLEE MCP23017 I/O Expansion Board Module SG-IO-E017, 16 I/O Pins Supports for Raspberry Pi Series, Onboard 3-Digit DIP Switch, I2C Interface Compatible with 3.3V/5V Working Level : Electronics
Amazon.com: XICOOLEE MCP23017 I/O Expansion Board Module SG-IO-E017, 16 I/O Pins Supports for Raspberry Pi Series, Onboard 3-Digit DIP Switch, I2C Interface Compatible with 3.3V/5V Working Level : Electronics
Amazon.com: CQRobot Ocean: MCP23017 IO Expansion Board Compatible with Raspberry Pi/Micro:bit/Arduino/STM32 Motherboard. I2C Interface, Expands 16 I/O Pins, Up to 8 Expansion Boards Can be Used Simultaneously. : Electronics
Amazon.com: XICOOLEE MCP23017 I/O Expansion Board Module SG-IO-E017, 16 I/O Pins Supports for Raspberry Pi Series, Onboard 3-Digit DIP Switch, I2C Interface Compatible with 3.3V/5V Working Level : Electronics
Amazon.com: I2C Interface Extension Module, 3.3V 5V Levels 16 IO Pins IO Expansion Board PCB Material Current Controllable for Computer : Electronics
Amazon.com: GeeekPi GPIO Screw Terminal Block Breakout Board HAT for Raspberry Pi, GPIO Expansion Board Breakout Module with GPIO Status LED for Raspberry Pi 4B/3B+/3B/2B/B+/Pi Zero W/Pi Zero 2 W : Electronics
Amazon.com: Edge Connector Expansion Board for Micro:bit Breakout The I/O pins to 2.54mm Pitch Pinheader Interface @XYGStudy : Electronics
Amazon.com: KEYESTUDIO GPIO Breakout Kit for Raspberry Pi - Assembled Pi Breakout + Rainbow Ribbon Cable + 400 Tie Points Solderless Breadboard : Electronics
Amazon.com: AW9523B IO Expansion Board for Raspberry Pi/Micro:bit/Ardu/STM32, I2C Interface, Expands 16 I/O Pins Allows Using 4 Expansion Boards at The Same Time, Expanding up to 64 I/O Ports : Electronics
Amazon.com: XICOOLEE MCP23017 I/O Expansion Board Module SG-IO-E017, 16 I/O Pins Supports for Raspberry Pi Series, Onboard 3-Digit DIP Switch, I2C Interface Compatible with 3.3V/5V Working Level : Electronics
Amazon.com: XICOOLEE MCP23017 I/O Expansion Board Module SG-IO-E017, 16 I/O Pins Supports for Raspberry Pi Series, Onboard 3-Digit DIP Switch, I2C Interface Compatible with 3.3V/5V Working Level : Electronics
Amazon.com: CQRobot Ocean: MCP23017 IO Expansion Board Compatible with Raspberry Pi/Micro:bit/Arduino/STM32 Motherboard. I2C Interface, Expands 16 I/O Pins, Up to 8 Expansion Boards Can be Used Simultaneously. : Electronics
Amazon.com: DIYmall ESP32 Expansion Board, ESP32-IO Sensor Expansion Shield for DOIT DEVIT V1 ESP32-WROOM-32 ESP32 Development Board : Electronics
Amazon.com: KEYESTUDIO GPIO Breakout Kit for Raspberry Pi - Assembled Pi Breakout + Rainbow Ribbon Cable + 400 Tie Points Solderless Breadboard : Electronics
Amazon.com: risingsaplings 4pcs GPIO IO 8 Pins Breakout Board for pms5003 (not Included Cable) : Electronics
Amazon.com: CQRobot Ocean: MCP23017 IO Expansion Board Compatible with Raspberry Pi/Micro:bit/Arduino/STM32 Motherboard. I2C Interface, Expands 16 I/O Pins, Up to 8 Expansion Boards Can be Used Simultaneously. : Electronics
![Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C [STEMMA QT / Qwiic] : ID 4132 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/4132-07.jpg "Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C [STEMMA QT / Qwiic] : ID 4132 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits")
Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C [STEMMA QT / Qwiic] : ID 4132 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
8 Channel I2C Interface Relay Module for Arduino, Raspberry PI, Home Assistant YAML, ESP32 3.3V
Amazon.com: Micro Connectors Raspberry Pi 40-pin GPIO 1 to 2 Expansion Board (RAS-GP02),Green : Electronics
Amazon.com: HiLetgo Nano IO Shield Sensor with Compatible for XBee and nRF24L01 IO Wireless Interface Breakout : Industrial & Scientific
