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.

Supplies:

• 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,

g3holliday