The base unit houses an Arduino board which polls the buttons ... There are several other quiz buzzer projects kicking around Hackaday if you’re interested. One of our favorites is this system ...

With their cheap price tags, massive I/O provisions, and low power consumption, microcontrollers like the uber-popular ...

These Modulinos include controls like buttons and knobs, programmable LEDs, a buzzer ... any of seven different projects: The Plug and Make Kit is available on Arduino’s online store now ...