Infrared transmitter circuit schematic
This infrared transmitter use PWM, pulse width modulation
The transmitter is equiped with LM 567, tone decoder circuit. Audio signal ( at least 50mVvv ) is amplified with T1 and then it is used to modulate IC1. Infrared transmitter frequency is adjusted with P2 between 25 and 40KHz.
IR transmitter circuit diagram
about 4 months ago
this circuit is a little bit complicated.. using a 555 timer and a few resistors and diodes makes the circuit a lot simpler easy to construct thereby reducing the cost factor also.
about 4 months ago
@sidharth – do you have the infrared transmitter circuit you are talking about? We would like to present it on the website, thanks a lot.
about 3 months ago
thank yuo its very good