I need help making a super small buzzer powered by a large hearing aid battery. I am in need of it being around the size of a quarter to a half dollar and simply must buzz every 10 or so seconds when activated. The simpler the execution the better. Any help or diagrams would be appreciated. He...
I am looking for an extremely loud buzzer for a personal project. I'm looking for something that is about 130 db at the source. Ideally, I would like to find something like what is used in all the personal defense keychains. The buzzer needs to be small and the voltage needs to be less than 20...