Figure an Arduino most matches the "Other" category. To be specific, it isn't an Arduino brand, it is a DigiSpark, but the trouble isn't with the device itself. The problem is with a buzzer. I got ...

It’s an electronic device commonly used to produce and signaling a procces that is happening through a sound, beep or etc. The Piezo buzzer produces sound through electricity. Some uses of Piezo ...

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 ...

Powered by a Lithium cell, it monitors an MQ-3 Alcohol gas sensor and drives a buzzer. ... Posted in Arduino Hacks Tagged alcohol sensor, breathalyzer, buzzer, mq-3, New Year's Eve, Teensy.