It is a small circuit using two 555 timers to create a repeating short buzz.
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wisefideloper/drunkzackkitz/scripts/fideloper.txt at master · fideloper/wisefideloper · GitHub
It is a small circuit using two 555 timers to create a repeating short buzz.
Buzzing Prank Toy
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Prank Stuff,Mini PCB Lrritating Noisemaker & Calls of Lnsects ,Small Size and Long Battery Life Start a Prank at Party,Office,Home : Toys & Games