Infrared circuits for remote control


Posted on Jun 23, 2012

Infrared remote controls are using a 32-56 kHz modulated square wave for communication. These circuits are used to transmit a 1-4 kHz digital signal (OOK modulation) through infra light (this is the maximum attainable speed, 1000-4000 bits per sec). The transmitter oscillator runs with adjustable frequency in the 32-56kHz range, and is being turned ON/OFF with the modulating signal, a TTL voltage on the MOD input. On the receiver side a photodiode takes up the signal.


Infrared circuits for remote control
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ali   Feb 16, 2008

Infrared circuits for remote control schematic diagram for transmitter and reciever

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