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 ...

Our schematic consists on 3 elements which are: Photoresistor (LDR), Piezo Buzzer, 1 – 10 kΩ. The LDR can be connected any way you want because doesn’t have polarity. For resistance you can use from 1 ...

Theses are the team buzzer boxes which [Philippe Chrétien] built for his mother. She’s a big fan of quiz shows (we’re thinking Jeopardy and the like) and he thought she’d enjoy a … ...

Prototype was constructed & tested using “Arduino UNO-R3” board; Sketch created,compiled & uploaded (to Arduino board) using Arduino IDE0022; Piezo-Speaker in the circuit is a “passive piezo-speaker”.

Inside the cool laser-cut box is an Arduino Uno and a 9V battery, plus a current-limiting resistor and the all-important buzzer. ... to build a project based on your 1D LED pong, Arduino-style ...