COVID-19 Visitor Counter

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

The diagram and simulation is here at Tinkercad.

The code has wiring comments too.

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.

Congratulations! You are finished.

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

Merry Making at Home,

g3holliday