Each buzzer consists of an Arduino Pro Mini 3.3 V, a nRF24L01, and of course a big pushbutton on the top.

An Arduino Pro Mini takes care of switching the relays based on the button presses. On the input side, you can plug in devices like a phone, TV, digital audio player or a computer.

The creator of the Arduino RF Pro Mini open source development board Etienne, explains a little more about the inspiration behind the project. “ I’ve loved Arduino for years.

Arduino is a company that’s best known for making small, programmable microcontroller boards. But the new Arduino Pro Portenta X8 is a full-fledged, Linux-friendly computer with a compact design.

This morning, Arduino announced a $22 million extension to that round led by Bosch Ventures and featuring Renesas Electronics.