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$12.40
Watangtech MCP23017 I/O Expander Module - 16 GPIO Pins, I2C Interface, Onboard 3-Digit DIP Switch - Compatible With Raspberry Pi, Arduino, STM32 (3.3V
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1
$12.40
Watangtech MCP23017 I/O Expander Module - 16 GPIO Pins, I2C Interface, Onboard 3-Digit DIP Switch - Compatible With Raspberry Pi, Arduino, STM32 (3.3V
Amazon.com
$12.40
MCP23017 IO Expander Board, I2C Interface 16 GPIO Pins - Compatible With Raspberry Pi, Arduino, STM32 For Easy IO Port Expansion
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$12.40
MCP23017 IO Expander Board, I2C Interface 16 GPIO Pins - Compatible With Raspberry Pi, Arduino, STM32 For Easy IO Port Expansion
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$8.99
XICOOLEE CAT9555 IO Expansion Module Board I2C Interface, Smbus I/O Port, 16 Bit Parallel GPIO Expander, With Pre-Soldered Header
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10
$8.99
XICOOLEE CAT9555 IO Expansion Module Board I2C Interface, Smbus I/O Port, 16 Bit Parallel GPIO Expander, With Pre-Soldered Header
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$11.50
DSLRKIT 8.5mm+11mm+13.5mm+16mm GPIO And Poe Pin Header Height Increaser Extender For Raspberry Pi 5 4B 3B+ 3B
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$11.50
DSLRKIT 8.5mm+11mm+13.5mm+16mm GPIO And Poe Pin Header Height Increaser Extender For Raspberry Pi 5 4B 3B+ 3B
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Watch all 48 relays turn on and off one by one in this short demo! This setup uses MCP23017 I2C GPIO expanders and can support up to 128 outputs, showing how you can control lots of devices using just a few Arduino pins. Perfect for automation projects, smart home setups, or large Arduino systems.
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