Figure an Arduino most matches the "Other ... You're overthinking this. Note: You can't really use PWM to vary the volume of a buzzer. I think it has something to do with the oscillator.

Each buzzer consists of an Arduino Pro Mini 3.3 V, a nRF24L01, and of course a big pushbutton on the top. Each one is powered by a 110 mAh 3.7 V LiPo battery, though [Flute Systems] notes that the ...

Since [Chuck] only had a short bit of time and a tiny budget to work on, he opted to find the easiest solution to the problem, which was an Arduino-based game show buzzer system. The game display ...