[time-nuts] TTL to RS-232
jgray at zianet.com
Tue Feb 13 20:31:07 EST 2007
Great tip. Thanks for sharing. You're lucky to have a decent surplus place
locally. If I were to walk into the only so-called surplus place we have and
asked for a MAX232 chip, I'd get blank stares. If it's not 50 years old, or
a new clone PC component, he won't have it or know what it is.
----- Original Message -----
From: <N3IZN at aol.com>
To: <time-nuts at febo.com>
Sent: Tuesday, February 13, 2007 6:22 PM
Subject: [time-nuts] TTL to RS-232
> Thought I would pass this on.
> I was working on one of those GPS disciplined oscillators kits out there
> it didn't have provisions to read the NEMA data to see if it was locked
> not. So I was at the local electronics surplus parts store (AKA junk
> and started looking for MAX232 chips and he directed me to a section
> where they
> had cell phone accessory cables.
> This cable had a DB 9 on one side and the other plugged in to the cell
> phone. From his suggestion, I cut off the cell phone plug end and stripped
> wires. Plugged it in to a pc with procomm running in "chat" mode. It was
> just a
> process of elimination to see which one was sending data and which
> data. Hooked it directly to the GPS engine and it worked. A TTL to RS232
> adapter for less than $4.
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> time-nuts at febo.com
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