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Raspberry Pi Pico GPIO Breakout Extender DIY Expansion Board Male Female Pin with Switch for RPI Pico W
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Programmable USB HID board for up to 10 buttons USB to GPIO Extender Module With 10 Inputs / 4 Outputs. Compatible with Raspberry Pi. - Newegg.com
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Raspberry Pi Pico GPIO Breakout Extender DIY Expansion Board Male Female Pin with Switch for RPI Pico W - AliExpress
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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
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