On Thu, 7 Apr 2005 13:49:14 -0500, "Thomas Abell"
put finger to keyboard and composed:

I am searching for a circuit diagram for a device that I can build. I need
this device to divide serial data while amplifying the signal so that both
outputs are equal to the input.

I need this because I have a serial device that is providing a one-way data
flow into the serial port on my computer. I want to be able to split this
signal and put it into two ports. Simply running the data in parallel to
both com ports doesn't work because I believe that too much signal is being
lost.

Can anyone offer suggestions?

Thanks.

You *should* be able to drive two RS232 inputs from one output. If
not, then you could buffer the output with an MC1489 quad line
receiver and use this to drive an MC1488 quad line driver.
Alternatively, to avoid the need for additional +/-12V supplies, you
could use a single +5V Maxim IC with on-chip charge pumps.


- Franc Zabkar
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