Day 21: Dual-Mode Control — IR Remote + Sound
Day 21 of Learn Coding with Arduino — combine the IR remote and sound sensor in one sketch with manual and auto modes, and the LCD showing current state.
Integration
Day 22: Project — Smart Room System
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Day 22 of Learn Coding with Arduino — the big one. Build a Smart Room System combining IR, sound, LCD, light sensor, LED, and buzzer into one program.