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Simple Intercom Circuit Transistor

2015-01-09 19:12  
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Circuit diagram is a simple but effective circuit intercom circuit is based entirely on transistors. Circuit diagram is based on three stages plus RC amplifier. When the pushbutton S2 is pressed, the amplifier cord around T1 & T2 becomes astable multivibrator and started to generate a ringing signal. This ringing signal is amplified by the transistor T3 to drive the speaker. When the S2 button is released the circuit will behave as a normal amplifier and you can talk to the other side through it. The following is a schematic drawing:

transistor intercom circuit1 Simple Intercom Circuit Transistor

M1 condenser mic can micro phone. Use push to ON type switch to the S2. Use the slide S1. Switch S1 to switch can be used to turn on the circuit. Build a two-way intercom, making two identical copies of the sequence given below and link it in accordance with a given connection diagrams. Who stood with consumption of this circuit current is about 20mA. Here is a picture of the transistor diagram of the intercom system:

transistor intercom connection diagram 300x219 Simple Intercom Circuit Transistor

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