[aprssig] Really CHEAP Puck-type USB GPS Receiver
Boyd Prestwood K5YKG
k5ykg at earthlink.net
Sat Jan 21 11:18:41 EST 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
>
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