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Waveshare MCP23017 IO Expansion Board I2C Interface Expands 16 I/O Pins 8 pcs Stacked and Used at The Same Time Allow Multi I2C Modules to be Stacked Müheloses Einkaufen Garantiert 100% authentisch
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Amazon.com: GeeekPi Raspberry Pi GPIO Extension Board, Raspberry Pi 4 Expansion Board GPIO 1 to 4 for Raspberry Pi 4B / 3B+ / 3B with Screws : Electronics
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