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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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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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Control a 16x2 LCD with Only 2 Wires — Arduino + MCP23017 I2C Expander
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ESP32P4-C6開発ホードJC4880P443とMCP23017拡張GPIOボードとの組み合わせでMOS-FETモジュールを制御する様子。
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