Commodore PET RS-232
cclist at sydex.com
Mon Dec 15 18:04:14 CST 2008
On 15 Dec 2008 at 21:07, Alexandre Souza wrote:
> > DEC had boards like that for going from TTL to RS232 as modules and
> > for current loop (TTY) to RS232 or the other way around. There were
> > a lot of "things" that often had oddball interfaces like Ham radio
> > tranceivers that could be driven by computer but only had serial TTL.
> You can use the good old max 232 and 5 1µF caps.
I bought a tubeful of TI MAX232Ns, thinking that they were the same
as the MAX232A--nope, the "N" takes 1.0 uF caps and the "A" uses 0.1
If I had to do it over again, I'd use a MAX233 (only a single 1.0 uF
decoupling cap) or a MAX202 (0.1 uF caps).
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