Hand Washing Timer With Sounds

I saw a project idea of a handwashing timer using a servo and an ultrasonic sensor and wanted to try it out. Making sure that you and people using the bathroom are washing our hands properly is important to keep clean, especially with the COVID pandemic happening now. I thought this idea was a great way to build something to help in keeping up the handwashing routine. Here is the original project that you can check out! https://www.hackster.io/331510/wash-a-lot-bot-a-diy-hand-washing-timer-2df500

Check out the Youtube Video I made for this project!

Step 1: Materials

Arduino UNO

Ultrasonic Sensor

Micro servo

Buzzer (my addition to the project is sound)

Wires

Breadboard

Paper

Scissors

Marker

Step 2: Build the Circuit And Pieces

Here are some notes to get an understanding of the components. This will be helpful when you make the circuit.

Here is the circuit:

Step 3: Code

The comments will help you understand the code. Basically, when a hand is detected, the buzzer will play a sound, then the servo starts to increment to show the timer. If the hand moves away during the time, a sound will buzz and the timer restarts. At the end, the timer plays a nice sound and resets.

Step 5: Demonstration and Installation

The project looks nice near the sink, like somethings always watching you!

This was a really fun project to make, but the code did take some troubleshooting. To see how I tested and built everything step by step, check out my Youtube video! Make sure to check out the original tutorial as well, as it was a great project idea. Make sure to wash your hands properly everyone!