Window Burglar Alarm

@Tazer1

3 years ago

https://everycircuit.com/circuit/6301546559832064

Ajustable Time Relay 5 Second to 2 Minute. Remove push button for testing and current source. Replaced by encapsulated flat Piezo Tweeter . Diode= 1N4148 , 2 Transistor=BC547 , Voltage=7812, 10nF and 100nF=Ceramic. Relay=12 Volts.