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 ...

Visual Circuits recently announced that OTRUM, a leading provider of interactive TV solutions and movies to hotels in Europe, the Middle East and Africa, has selected its Harmony MPEG Decoder. The ...