[Noisebridge-discuss] Bike generator or alternator?

Robert Benson sf99er at gmail.com
Thu Aug 28 21:33:25 UTC 2014

Thx for the info & link. Looks like the NC25A Charge Controller may be
better than a voltage regulator if you dump excess to aux battery. Still
not clear on cause of alternator being more efficient when half it's cycle
is blocked by diode(s). Anyway, I think I'll get an alternator instead of
the generator I was planning to get. Thx again. Cheers

On Thu, Aug 28, 2014 at 1:53 PM, Joseph Brenner <doomvox at gmail.com> wrote:

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> Typically, a "generator" implies it's DC output, and an "alternator"
> implies the output is AC.
> To charge a battery, you need to "rectify" the output from an
> alternator to fake DC, but
> that's more efficient because you get to use the full cycle.
> There's a bunch of other issues... you probably want a "deep discharge
> marine/rv" battery--
> and the last time I messed with this kind of thing, there was no good
> substitute for Sears Die Hards--
> and you'll want some sort of voltage regulator to keep from overcharging...
> There's a bunch of web pages like this around that talk about this stuff:
> http://www.doityourself.com/stry/how-to-charge-a-12v-battery-with-an-exercise-bicycle
> On Thu, Aug 28, 2014 at 10:20 AM, Robert Benson <sf99er at gmail.com> wrote:
> > I'm building a 12v bike generator out of a stationary bike exercise
> stand.
> > Does anyone (jake) know if a car generator or alternator is better or
> what
> > the differences are in output? thx
> >
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