[Noisebridge-discuss] N00b question - changing power supply voltage

[jim]

   maybe a string of diodes (each diode should be 
rated for greater than the greatest expected current 
(e.g. 7 Amps or greater). at 0.7 V each, probably 
need 16 or so to drop the voltage from 24 to 12. 
   or one resistor, maybe 2.5 ohms and greater than 
50 watts. 
   either of the above in series with the "pelt". 
   note you should verify the current and voltage 
tolerance of the "pelt": maybe a slightly higher 
voltage will be okay--how high. given the passive 
description, higher voltage means greater current, 
which certainly means greater heat and may have
some other affect--should check. also, will the 
thing work with slightly lower-than-rated 
voltage and current? 




On Thu, 2010-07-01 at 19:24 -0700, Thor wrote:
> Heatsink and fan to keep the ICs cool enough to power the pelt which
> needs /another/ fan and heatsink to work =)
> 
> Is there any other way that can limit the voltage without adding that
> much heat?
> 
> -- 
> A curious hephaestus.
> 
> > On Jul 1, 2010 7:05 PM, "Ryan Castellucci"
> > <ryan.castellucci at gmail.com> wrote:
> > 
> > At that much current, the voltage regulators are likely to
> > *extremely*
> > hot.  You'll probably need a heat sink and fan to keep them from
> > melting.
> > 
> > 
> > 
> > On Thu, Jul 1, 2010 at 6:03 PM, Sean Cusack
> > <sean.p.cusack at gmail.com> wrote:
> > > Awesome - thanks guy...
> > 
> > --
> > 
> > 
> > Ryan Castellucci http://ryanc.org/
> > 
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