Hi Ni-cads are pretty low noise, reasonably stable, and close to the per cell voltage of the mercury cells. The gotcha is the self discharge rate. If you don't need a floating supply I suspect you can build up a " good enough" linear regulator to get things working.
Bob On Jun 14, 2011, at 8:12 PM, "Will Matney" <[email protected]> wrote: > Bob, > > I've thought about that, and also thought about the 24 volt battery packs > used in those Schwinn scooters the kids have. I can buy a 24 volt charger > cheap for those, but the batteries run about $60.00 each plus shipping, and > they are probably rated at around 4 amp hours, I think. It may be the way I > go, since I think they are Ni-Cad instead of lead-acid. The problem is, I > wonder what type of noise any voltage regulators will cause in the circuit? > > Thanks, > > Will > > *********** REPLY SEPARATOR *********** > > On 6/14/2011 at 8:01 PM Bob Camp wrote: > >> Hi >> >> Ni-cads are a pretty good bet. >> >> Bob >> >> >> >> On Jun 14, 2011, at 7:02 PM, "Will Matney" <[email protected]> wrote: >> >>> Hello, >>> >>> I am in need of a very clean 24 Vdc power source, to replace some old >>> mercury cell batteries with. What would a good low noise, clean, power >>> supply be in your recommendations? I thought of using two 12 Vdc > lead-acid >>> batteries in series, and making a charging circuit with regulators, but > I >>> am hoping to purchase a good used supply off ebay, etc. The old circuit >>> used two 12 Vdc snap terminal mercury batteries in series, for 24 Vdc, >>> along with a 7 Vdc mercury cell, and two plain AA carbon 1.5 Vdc > batteries >>> in series for 3 volts. Any help and or ideas would be appreciated. >>> >>> Thanks >>> >>> Will >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> >> __________ Information from ESET Smart Security, version of virus > signature database 5851 (20110206) __________ >> >> The message was checked by ESET Smart Security. >> >> http://www.eset.com > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
