[aprssig] NMEA ISSUE HELP
kg4wsv at gmail.com
Sat Feb 5 21:38:55 EST 2011
On Sat, Feb 5, 2011 at 7:54 PM, Joe Della Barba <joe at dellabarba.com> wrote:
> I looked up this device you mentioned
> Do these invert the GPS output? AFAIK, I don't need it inverted, just more
an RS232 transceiver both inverts the logic and changes the voltage.
I feed the RS232 into the MAX237, fan out on the TTL side, and go back
to RS232 for the extra copies. A schematic is here:
This circuit includes a regulator and a jumper (R1) to feed 5V to the GPS18.
One up side of this arrangement is a non-standard RS232 implementation
like the GPS18 comes out of the splitter meeting spec.
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