On Wed, 3 Aug 2016 14:30:33 -0700, you wrote: >On Wed, Aug 3, 2016 at 2:08 PM, David <[email protected]> wrote: > >> >> I looked at the schematic and is seems feasible without excessive >> effort. Either the existing simple series preregulator can be >> modified or replaced allowing it to both charge the battery (through a >> blocking diode) and power the instrument or a completely separate >> power charging circuit can be added in parallel. > >The existing charging circuit _is_ in parallel with the pre-regulator; they >are separated by CR5 and CR6 and the pre-regulator/battery outputs are >combined by CR8 and CR9. The only problem with the existing circuit is >with a fresh, strong, fully charged battery pack, charging pulses will leak >past CR8 with only R1/C1 to filter them.
Ah, I did not see that A1S1A is the same as switch A1S1B; I am used to seeing a little dashed line connecting all of the elements of a single switch. I guess that goes along with the symbol they used for constant current diode CR10 which I have not seen in a long time. Anyway, the changes I suggested still apply. Actually, using a battery which accepts a constant voltage charge simplifies the requirements. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
