remote control

Posted on Feb 5, 2014

Every key pad button generates 5 bit binary code and IC1 sends this code to the IR leds through D1 and D2 diodes. Code is shaped from 6 pulses with 5 gaps. Pulse position modulation PPM technique is used for transferring data. Data information occurs at gaps. For logic 0, long gap, for logic 1 short gap is generated. SL490 includes an auto sta

remote control
Click here to download the full size of the above Circuit.

nd-by circuitry. When the buttons are not used for a while, IC will swich to stand-by mode and stand by current will be 6uA.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    60W power amplifier
    HF 1-30MHz linear amplifier
    Multiple output switching power supply circuit Schematic Diagram
    A High Power Led Driver For Low Voltage Halogen Replacement
    USB phone charger
    Geiger Counter Data Logger with LND712
    H-bridge driver circuit composed by the Smart SIPMOS