[aprssig] Really CHEAP Puck-type USB GPS Receiver

Boyd Prestwood K5YKG k5ykg at earthlink.net
Sat Jan 21 10:18:41 CST 2012

Stephen H. Smith    wa8lmf (at) aol.com :
> Actually, if you wanted to provide 5 VDC from an external source, it 
> should be possible to tap in ahead of the serial-->USB converter chip 
> to get at the serial data stream.    However, the serial signal will 
> probably be at TTL levels and would have to be inverted, possibly with 
> an added MAX-232    TTL-->RS-232   level-converter chip.
> I'll crack mine open as soon as I receive it and investigate this 
> possibility.
> ------------------------------------------------------------------------------- 
> Cool... this was my second question in a reply that didn't seem to 
> make it to the SIG... maybe it was a personal reply direct... I forget 
> now.  At the advertised price, I wouldn't worry about the warranty or 
> opening the unit up even if this idea didn't work...  I have had TTL 
> work satisfactorily into an RS-232C input before but forget the 
> circumstances now.  It was a long time ago.
> Boyd, K5YKG

More information about the aprssig mailing list