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
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Amazon.com: Arduino Leonardo with Headers [A000057] : Electronics
Amazon.com: for Arduino Nano Elektronik Devreler Nano Terminal Expansion Board Terminal Board Adapter Screw IO Shield Electronic Circuit : Electronics
Amazon.com: Serial Wombat 18AB I2C / UART Smart I/O GPIO and Analog Expander for Arduino (2 Pack, Black Label) : Electronics
Amazon.com: ACEIRMC 6pcs Nano V3.0 3.0 Controller Terminal Adapter Expansion Board Nano IO Shield Simple Extension Plate for Arduino Mano AVR ATMEGA328P : Electronics
Amazon.com: DFRobot Gravity: IO Expansion Shield for Arduino V7.1 : Electronics
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Amazon.com: KNACRO I/O Expansion Sensor Shield Module for UNO R3 Nano V3.0 Nano Pro : Electronics
Amazon.com: 10Gtek# Nano I/O Expansion Multi-Purpose Extension Sensor Shield Module for Arduino UNO R1 R3 Nano, Pack of 3 : Electronics
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Amazon.com: Arduino Nano 33 IoT [ABX00027] : Electronics
Amazon.com: HiLetgo 5pcs Nano I/O Expansion Sensor Shield for Arduino UNO R1 Nano 3.0 Duemilanove 2009 : Electronics
Amazon.com: Comimark 3Pcs PCF8574 PCF8574T I2C 8 Bit IO GPIO Expander Module for Arduino & Raspberry Pi : Electronics
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Amazon.com: Arduino Due with Headers [A000062] : Electronics
Amazon.com: HiLetgo 3pcs Nano V3.0 3.0 Controller Terminal Adapter Expansion Board Nano IO Shield Simple Extension Plate for Arduino Mano AVR ATMEGA328P : Electronics
Amazon.com: Prototype Shield I/O Extension Board Expansion Module V3.0 for Arduino Nano : Electronics
Amazon.com: Gump's grocery Expansion Board Terminal Adapter DIY Kits for Arduino Nano IO Shield V1.0 : Electronics
Amazon.com: 3PCS Mini MP3 Player Audio Module MP3 Voice Decode Board TF Card U Disk IO/Serial Port/AD Board DFPlayer Audio Voice Music Module for Arduino : Electronics
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
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Amazon.com: HiLetgo Nano I/O Expansion Sensor Shield for Arduino UNO R1 Nano 3.0 Duemilanove 2009 : Industrial & Scientific
Amazon.com: HiLetgo Nano I/O Expansion Sensor Shield for Arduino UNO R1 Nano 3.0 Duemilanove 2009 : Industrial & Scientific
Amazon.com: AITRIP 10pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module for Arduino & Raspberry Pi : Industrial & Scientific
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Amazon.com: ARDUINO MEGA 2560 REV3 [A000067] : Electronics
Amazon.com: Velleman VMA05 I/O Shield for Arduino, 1 Grade to 12 Grade, 2.75" L x 2.16" W x 1.18" H : Electronics
Amazon.com: ALMOCN 10pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module for Arduino Raspberry Pi : Electronics
