once the switch is flipped on the timed soundie, you have 12 seconds before it emits a nice loud and constant beeeeeeeeeeep, enough for me to hear throughout my whole house. on the underside of the soundie is a magnet, becuase throwing them to places people can't reach is fun!
this instructable inspired in part by:
the original LED throwie
Step 1: The nitty-gritty...
2 3v button cells (cr2032)
1 M ohm resistor
piezo buzzer (about the width around of a 3v button battery)
(this is my first time drawing a schematic, so tell me if its wrong!)
the legs of the 555 are bent out and the whole circuit wraps around the buzzer.
all of the parts are soldered or taped directly onto the 555 or the piezo buzzer. the wires soldered onto the circuit going to the batterys are just taped to the top and bottom of a stack of two button cell batterys. like a soundie sandwich, a battery is added and taped to the bottom. (this is optional, incase its just being used as a sound grenade to bother people or for use in an airsoft or paintball scrim)
NOTE: the buzzer's + should be connected to pin 3. the - is connected to pin 1.