You can combine this circuit with alarm circuit. The output will be the relay which switch on and switch off the alarm.
other circuit
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CIRCUIT POWER AMPLIFIER 2000 WATT SCHEMATIC DIAGRAM This is linear amplifier which need advance knowledge in electronics since the schematic... -
NiCd – NiMH Battery Charger circuit diagram Note: I is 1/10 of the battery’s charging capacity. For example if battery has a rated capac... -
CIRCUIT 13.8 VOLT 20 A TRANSFORMERLESS POWER SUPPLY SCHEMATIC DIAGRAM This 13.8 Volt 20 A regulated transformerless power supply. 20A transf... -
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