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What can I do with piezo buzzers/sirens/beepers, switches, safety switchs, and other basic components?

I have some components I really like, but I don't know how to use them!!!
 (resistors, leds, 555 timers.. etc.)? relays even?


iceng6 years ago
You can get a head-ache.

or

You can get my favorite a smart tap-tap----tap type binary serial unlock code buried inside of a car door.

A
joeismydad6 years ago
go search online
Kiteman6 years ago
Browse the Technology section and you should be inspired.
frollard6 years ago
Search 'buzzer' and you'll find a tonne of ibles.