Hand washing timer

Built by using a bare PIR element and Arduino Nano
May 05, 2020 — 1 min read — Arduino

Hand washing timer

In my previous article I looked at the options of using a PIR sensor in Arduino projects and I came to the conclusion that the best option is to use a commercially available module.

However, when the requirement is to detect movement really close to the sensor, we can use a bare PIR element to detect the movement up-close.

As a proof of concept for this, I've created this hand washing timer prototype circuit with a NeoPixel LED ring that lights up in a rainbow pattern whenever we wave in front of the PIR element.

For more details on the project, make sure to also check the Instructable for it.

To learn more about PIR sensors, please check my previous video.


Tools and materials needed for the project:

led PIR RGB arduino neopixel
Read this next

Fumes extractor with built-in power supply

For a very long time, I did not have a fumes extractor on my bench so while soldering I was often directly exposed to the fumes which are no...

You might enjoy

Making an accurate YouTube Subscriber Counter

I started preparing for this project about one month ago, but then I was derailed by YouTube when they announced that they will no longer pr...