Since I had a couple of spare RS-232 driver gates, I built a simple PPS extender/level shifter in my Thunderbolt Monitor kit. It is not as general purpose (not configurable) as the Fat PPS kit from TAPR, but it works well for the Thunderbolt. You could easily build the circuit on a piece of perf board using the DIP version of the chip.
Didier KO4BB WWW.KO4BB.com Hal Murray <hmur...@megapathdsl.net> wrote: >> Does the Trimble Thunderbolt provide 1pps on DCD of the RS232 >interface? > >No, but you can open it up and add a wire. That will give you CMOS >rather >than RS232, but it works. (Or at least, it works for me and I've never >heard >a good story where it didn't work.) > >One problem is that the PPS signal is narrow. Some PCs may not be able >to >catch it. You can use the FatPPS from TAPR: > http://www.tapr.org/kits_fatpps.html >(It needs power. You can probably find that in the TBolt. I haven't >done >it.) > >I added a diode and R/C. That was good enough for the PC I was using. > > >-- >These are my opinions. I hate spam. > > > >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. -- Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
