Ic circuit speaking to a hand controller.

Discussion in 'General Electronics Chat' started by Netkey, Jul 9, 2012.

  1. Netkey

    Thread Starter New Member

    Jul 9, 2012

    I've joined the forum hoping that someone could help me with a few questions that I'm lacking answers to.

    I have a massage chair, quite old. The hand control has options on it but is now not working. After a long storage here in the UK the small Pcb inside the hand controller is rusted up. Therefor is won't work but I'd need to create a makeshift control as it seems a waste. There is no chance of getting a spare.

    My questions are there, I would greatly appreciate help with this.

    1. I could replace the Start, Stop, Recline, Return commands with something.
    2. What type of signals are these is it a small voltage change (my assumption) The hand controller plugs into a four pin terminal on the main chair board.
    3. Will another controller work if I can identify wiring configuration. We have found another controller similar.

    On the board there is Gnd (ground) and +5v (live) but nothing on other pins. How can 4 commands come from 2 pins?

    Thanks for anyone's help on this.