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Ultrasonic occupancy counter with Arduino and HC-SR04

Limiting the number of people inside a shop or venue can help to maintain social distancing. This simple Arduino project can be placed in the doorway of a shop or other venue to count the number of people inside. The parts list, instructions, and code for building your own counter are available here: Instructables

We have also created a short demonstration video:

Video demonstration of the counter

All of the required components can be purchased for under £30, while the price per unit could drop to £10 when bought in bulk. If you are a maker, then perhaps consider creating these for local shops so that they can reopen safely as lockdown ends.

If you have any questions or feedback on this project please contact us by email:

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