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RS232 keypad help

Discussion in 'Electronic Basics' started by Roger Bagnall, Jan 5, 2004.

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  1. Hi,

    Can anyone help me with a link or circuit for the following:
    I am wanting to build a small cabled remote control keypad with 2 or 3
    buttons to control a PC during powerpoint presentations without having to
    have the mouse or keyboard on the lectern. I have seen these before but the
    only types i can find on the web are IR types.
    Ideally i would like it to use the RS232 port or parrallel port. Has anyone
    seen such a device and the software for it, i doubt it would be too hard to
    build ?

    Thanks in advance.
  2. JQP

    JQP Guest

    It would be extremely easy to build a 3 button controller that manipulates
    the control lines on the RS232 port. But you'll need software on the PC to
    monitor the port and take appropriate action whenever a change is detected.
    This you probably won't find ready-made anywhere.
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