Tag Archives: 2N2907

Electronic siren circuit with two transistor

Schematic Diagrams      Comments Off on Electronic siren circuit with two transistor

Operation of the circuit is Q1 and Q2 will work with R3, R4 and C2 is a frequency generator circuit with output connected to LED1 and speakers SP1. When I press the switch S1 to the C1 will begin to charge allows the voltage to pin B of Q1 increase… Read more »

Electronic siren circuit with two transistor

Schematic Diagrams      Comments Off on Electronic siren circuit with two transistor

Operation of the circuit is Q1 and Q2 will work with R3, R4 and C2 is a frequency generator circuit with output connected to LED1 and speakers SP1. When I press the switch S1 to the C1 will begin to charge allows the voltage to pin B of Q1 increase… Read more »