Color-changing lamp emulates a “touch” sensor with a microphone

Jun 10th, 2020 | by: Alice Kun
Category: Electronics LEDs

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YouTuber “Peterbiglab” wanted an input for his DIY color-changing lamp, but didn’t want to use buttons or even have it detect claps, so he decided to make it respond to touch. Instead of using a capacitive sensor or force-sensitive resistor, he placed a microphone inside his lamp to hear inputs. An op-amp was also included to pull the voltage up to a level that can be read by its Arduino Nano.

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With code implemented to keep it from picking up on music and other sounds, the device can now be controlled with finger taps: two to switch colors, three to turn on/off , or even four to enter Hue mode. It’s an ingeniously-simple sensing method, which works well here, and could be applied to a variety of other projects.

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