2 Transistor Electronic Siren Circuit Diagram


This is the electronic siren schematic diagram which used 2 transistor BC547 and BC557. The siren is powered by 9V battery or power supply adapter and use 8 ohm speaker to produce the sound. The siren is controlled by the touch plate switch. If you touch the plate, then this electronic siren will be activated. 

2 Transistor Electronic Siren Circuit Diagram

2 Transistor Electronic Siren Circuit Diagram