RS232 keypad help

[Roger Bagnall]

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.
RB
[email protected]

 

[JQP]

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 ?

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.