SIREN 100dB Circuit
This is a very loud siren and if two or more piezo's are located in
a room, the burglar does not know where the sound is coming from.
A robber will not stay anywhere with an ear-piercing sound as he
cannot hear if someone is approaching. It's the best deterrent you can get. The "F" contact on the piezo is
"feedback" and is not needed in this circuit.
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