Hello to the group Nigel is correct the way the schematic is drawn the Regulator will feed the battery and most likely cause it to burst. It should be 1 diode in series with the regulator and 1 in series with the battery so that the regulator can not charge the battery. Nice design you have created. Regards Paul WB8TSL
On Tue, Dec 15, 2020 at 11:55 AM Nigel gm8pzr via time-nuts < [email protected]> wrote: > Hi Mathias, > I'm assuming you're using a coin cell for back up, so wondering if one of > the diodes shouldn't be in series with the battery, with both cathodes to > V_BCKP? > Nigel GM8PZR > > > I've updated the repository on github with the latest design files. The > breakout board is now final as far as I'm concerned. > > I managed to implement all the requested features, this includes the > backup > battery and also the buffered PPS output with SMA footprint. > > Next step on my side will be to order a small batch of PCBs. There's not > much > on them and I guess I will end up with around 25? for 5 boards fully > assembled, shipping not included. > > I eventually removed the I2C pull-ups again, thanks to Patrick Tudor for > the > hint. The footprints are still there, I only removed them from the BOM. > > Schematic and a screenshot of the top and bottom sides attached. > > BR, > Matthias > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
