Amazon.com: ALMOCN 10pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module for Arduino Raspberry Pi : Electronics
Amazon.com: PCF8575 I2C 16 GPIO Expander Breakout - Stemma QT / Qwiic Ada 5611 : Electronics
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Amazon.com: Arduino Leonardo with Headers [A000057] : Electronics
Amazon.com: NOYITO PCF8575 25mm x 25mm Electronic Adapter, 16 IO Port Expansion Board for Microcontrollers : Electronics
Amazon.com: Waveshare MCP23017 IO Expansion Board I2C Interface Expands 16 I/O Pins Stack to 8 pcs Used at The Same Time Allow Multi I2C Modules to be Stacked : Electronics
Amazon.com: Waveshare MCP23017 IO Expansion Board I2C Interface Expands 16 I/O Pins Stack to 8 pcs Used at The Same Time Allow Multi I2C Modules to be Stacked : Electronics
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Amazon.com: Adafruit MCP23017 - i2c 16 Input/Output Port Expander [ADA732]
Amazon.com: JESSINIE MCP23017-E/SS I2C IIC Expander Board Module I2C to 16IO IIC Input/Output Expansion Board MCP23017 3.0V-5.5V for Arduino : Electronics
Amazon.com: Comimark 3Pcs PCF8574 PCF8574T I2C 8 Bit IO GPIO Expander Module for Arduino & Raspberry Pi : Electronics
Amazon.com: ALMOCN 10pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module for Arduino Raspberry Pi : Electronics
PCF8575 Remote 16 Bits I2C IIC SMBus I/O Expander Module with Interrupt Output for arduino Control Relay/Buzzer/LED: Amazon.com: Industrial & Scientific
8 Channel I2C Interface Relay Module for Arduino, Raspberry PI, Home Assistant YAML, ESP32 3.3V 5.0V 10A Peak LED Indicator for Each Relay Channel Control AC DC Voltage - I2C I/O pin
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Amazon.com: XICOOLEE CAT9555 IO Expansion Module Board I2C Interface, SMBus I/O Port, 16 bit Parallel GPIO Expander, with Pre-soldered Header : Electronics
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
Amazon.com: Waveshare MCP23017 IO Expansion Board I2C Interface Expands 16 I/O Pins Stack to 8 pcs Used at The Same Time Allow Multi I2C Modules to be Stacked : Electronics
Waveshare MCP23017 IO Expansion Board I2C Interface Expands 16 I/O Pins Stack to 8 pcs Used at The Same Time Allow Multi I2C Modules to be Stacked : Electronics - Amazon.com
Amazon.com: MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins 8pcs of Boards can Stack to Use at The Same Time up to 128 I/O Pins Allows Multi I2C
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Amazon.com: ALMOCN 10pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module for Arduino Raspberry Pi : Electronics
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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
Amazon.com: MCP23017 I2C GPIO Expander Breakout - Stemma QT / Qwiic Ada 5346 : Electronics
Amazon.com: ALMOCN 10pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module for Arduino Raspberry Pi : 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
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
