1. January 20, 2014 at 9:09 pm

    Claudia Lopez

    With this kit, do i have to connect the two 3mm LED lights? Are they necessary to make the kit work? I wouldn’t like to have the LED lights on the whole time. Thanks

  2. March 18, 2014 at 1:50 pm

    vinay saurabh

    This is a good and excellent circuit .

  3. July 15, 2014 at 6:29 pm


    I have built this infra red circuit and works no problems until I connect the relay although the led’s shows on and off when clicking tv remote but seems no power going to relay although reads power on multimeter and just for temporary installed resistor and led on power leads to relay and led lights up and switches off when clicking tv remote. any ideas please. thanks

  4. August 26, 2014 at 9:08 pm

    titus joseph

    i made the same circuit, the ir sensor senses but does not turn on the relay??
    what should be the actual input voltage


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