[time-nuts] TTL to RS-232

[Robert E. Martinson]

See also: http://www.futurlec.com/Mini_RS232_TTL_5V.shtml, its $4.90.  They
also have a 3 volt version, same price.  They have many other interesting
parts etc.

My recent order came from Australia so it took 2 weeks to arrive.  Shipping
cost is reasonable.

Regards,
Bob Martinson, N1VQR



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of N3IZN at aol.com
Sent: Tuesday, February 13, 2007 8:23 PM
To: time-nuts at febo.com
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
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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