This is very useful circuit you can transmit audio signals by using this circuit.You can send signals for about 4m.Q1 can be PNZ154, PNA1605F, BPW77NA or BPW85.

Note
# this circuit can be operated with 9V power supply
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electronic circuit, circuit diagram, circuit schematic, schematic diagram, electronic diagram, audio, amplifier, power supply, guitar effect, current loop, current limiter, video, receiver, transmitter, transceiver, transistor, radio frequency, rf, active filters, digital, analog circuit, pwm, micro controller Free download
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4 comments:
sir the transmitter should point the receiver or from anywhere the signals can be transmitted and received?
you have to aim the transmitter towards the receiver.
can i use IR sensing LED instead of transister in receiver????
can i use 3mm IR LED with 5mm IR receiver LED??????