Each unit consists of an arcade button and one LED ... of this setup is the ability to choose from 30 different buzzer sounds. There are several other quiz buzzer projects kicking around Hackaday ...

visually-impaired pedestrians were meant to cross when the sound of a ringing bell changed to a buzzer. Unfortunately these earlier audio pedestrian buttons caused confusion due to their ...

If you buy something from a Verge link, Vox Media may earn a commission. See our ethics statement. Andru Marino is an audio and video creator at The Verge since 2015. He has produced shows like ...