Question

How does automatic hand sanitizer dispenser work?

Answer 1

Automatic Soap Dispenser, $24.49

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DIY Automatic Alcohol Dispenser ($3 No Arduino Needed) - YouTube

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DIY Automatic Alcohol Dispenser ($3 No Arduino Needed) - YouTube

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The red wire of the USB cable goes to the VCC pin and the black wire goes to the ground pin of theMoreThe red wire of the USB cable goes to the VCC pin and the black wire goes to the ground pin of the sensor.