Here you can see [Matt Hanson’s] take on this idea. He used one Arduino to gather not just buzzer info, but also keypad data from four satellite controllers. Each has an RJ45 jack, allowing it ...

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 ...

After the buzzer goes off, you need to press the ... Probably one of the coolest Arduino projects out there is a ...