Introduction: COVID-19 Visitor Counter

About: I love robotics and all things electronic. print("Hello World")

This is a device that counts the number of people that come in or out of your door. It can beep if more than ____ people come in your door, since we need to keep occupancy low.


- Arduino Uno and necessary supplies - get it here

- ProtoShield - get it here

- Jumper wires - get them here

- Ultrasonic sensor - get it here

- Piezo buzzer - get it here

- Mini breadboard - get it here

Step 1: Wiring

The diagram and simulation is here at Tinkercad.

The code has wiring comments too.

Step 2: Code

The code is here at GitHub.

Upload it to your Arduino. If it doesn't work, then check your wiring. If the wiring is correct, then comment me.

Step 3: Finish

Congratulations! You are finished.

If it doesn't work as expected, then comment me. Stay safe from COVID-19!

Merry Making at Home,


Arduino Contest 2020

Participated in the
Arduino Contest 2020