If you
can find them (still) and the input side you use itself doesn't
have a problem, one thing we used to do on any oddball lashup was to buy
a small, 64k or so serial FIFO buffer. it eliminated all sorts of
When I had signal level problems, I used a mAX232 chip. I only needed the
data leads (TxD and RxD) so 2 buffer cirucits were enough. Each consisted
of a receiver section of the MAX232 driving a transmitter extion of the
same IC -- that is the logic-level (TTL-ish) output of the receiver was
strapped to the input of the transmitter. The receiver section seemed
fairly toelreant of waht it woudl accept, the transmitter produced a
signal that the receiving machine would tolerate.
Took me a few minutes to wire up. I can;'t remember how I powered it,
possibly a 7805 running from a junk-box wall-wart.
-tony
