I need a hardware solution - preferably off the shelf.  I used something like 
this 15 years ago and have no idea if anyone still makes them - any ideas?

****

I need to be able to generate a TTL signal when the "Enter" or <CR> key is 
pressed on a PC keyboard.  I used a box to do this (a long time ago) which 
plugged into the keyboard cable (old IBM, non-usb DIN type) between the 
keyboard and the PC and was powered by the PC.  The box generated a TTL signal 
when any key was pressed.

****

The background to this is that I have to start a data collection by two 
standalone PC's at the same time - one of the applications is completely 
self-contained with no analog control facilities at all, but the other 
application can be started via a TTL signal.

I know keyboard interface boxes that do this sort of thing existed once (back 
before the world went gui on me) and I could probably build one from scratch if 
the customer wanted to pay and I had the time.  And I realize the "at the same 
time" has a significant error attached to it no matter how it's done - I just 
want to eliminate the user error.

Regards,
Edmund Cramp
-- 
I hate leaving my house confident and looking good and then not seeing anyone 
of importance the entire day. What a waste.


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