Diy Hand Wash Reminder

About the project

Hand Wash Reminder is a Hand Band which reminds you to wash your hands after every 20 minutes.

Items used in this project

Hardware components

Polymer Lithium Ion Battery - 1000mAh Polymer Lithium Ion Battery - 1000mAh x 1
Push-button Power Switch Breakout Push-button Power Switch Breakout x 1
ON/OFF Rocker switch ON/OFF Rocker switch x 1
Single Stand Wire Single Stand Wire x 1

Software apps and online services

Arduino IDE Arduino IDE

Hand tools and fabrication machines

Soldering tools Soldering tools x 1
3D Printer 3D Printer x 1


Hand Wash Reminder is made using a Arduino Nano, a WS2812b LED and a home made Vibration Sensor. Whenever a person wants wash his/her hands they have to shake their hand with force so that vibration sensor detects the vibrations and triggers the reset of the Arduino board. As Arduino is reset the program comes to the initial values and starts. First the fading colors are lighten on the LED for 30 seconds which acts as a timer for rubbing our hands for 30 seconds, after fading mode Green color lights on the LED it stays for 20 minutes indicating that your hands are washed, after 20 minutes LED lights with Red color indicating that your hands are not washed. The Red color stays until you shake your hand and wash your Hands.

Schematics, diagrams and documents

Circuit Diagram:

CAD, enclosures and custom parts

Hand Band Clip

Go to download

3D Body

Go to download


Arduino Code


Photo of mukesh-sankhla


🧑‍💻Passionate software engineer at Siemens, dedicated to driving digitalization by day. 🧑‍🏭By night, I'm a maker exploring IoT, product design, electronics, CAD, and 3D printing, sharing my projects with the world.


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