The circuit has been created to design a decoder circuit that will operate in a module that would produce an audio surround sound. TL072 – a low noise JFET input operational amplifier with features ...

This infrared transmitter use PWM (pulse width modulation). The transmitter is equiped with LM567, tone decoder circuit. Audio signal ( at least 50mVvv ) is amplified with T1 and then it is used to ...