[time-nuts] TTL to RS-232
N3IZN at aol.com
N3IZN at aol.com
Tue Feb 13 20:22:39 EST 2007
Thought I would pass this on.
I was working on one of those GPS disciplined oscillators kits out there and
it didn't have provisions to read the NEMA data to see if it was locked or
not. So I was at the local electronics surplus parts store (AKA junk place)
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 the
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 received
data. Hooked it directly to the GPS engine and it worked. A TTL to RS232
adapter for less than $4.
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