wrote in message
ups.com...
I have a log which is connected to the gyro by RS232 line (around 3
metres long). I want to take a tapping out of this line and give a
parallel feed to the computer 12 metres away. Can I do that?
Which is the cheapest wire for such a distance?

Yes you can do that and you can use any type of twisted pair wire for that.

My second problem is that I need a GPS multiplexer. I dont think I can
get it in India. Is any circuit diagram scematic available whic I can
use for makin a simple 2in/1out multiplexer?

You cannot make a multiplexer with just some electronics. There sis always a
microprocessor with software involved to read, store and forward the NMEA
data.

Also can I increase the number of serial ports on my computer for more
inputs?

Take a look at our website: www.shipmodul.com for info about multiplexers.
We can also ship to India if needed.

Meindert
www.shipmodul.com