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

[Ryan Castellucci]

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 guys!
>
> I'm going to try to use this guy to power a peltier cooler (I've got a sweet
> idea here depending on how well I can get this doo-hickey to work). It takes
> 12V at up to 9A, but from the reading I've been doing, it looks like you
> want to stay away from the top value of amperage anyways. I'll give it a
> spin with just the 4.5A first to see how it works.
>
> Based on what I'm seeing below, if I use 2 voltage regulators in parallel,
> it looks like that should handle the current without a problem. I can
> totally drop in a cap after the fact to smooth out the current. Ryan - I'm
> considering doing an ATX PSU mod too...I've got an extra one laying around.
>
> Sean
>
> On Thu, Jul 1, 2010 at 5:05 PM, Ryan Castellucci
> <ryan.castellucci at gmail.com> wrote:
>>
>> How much current are you drawing?  TBH, you should really just go to
>> weird stuff and pick one up for a few dollars.  Another option would
>> be converting an ATX power supply to a bench supply.
>>
>> On Thu, Jul 1, 2010 at 1:57 PM, Sean Cusack <sean.p.cusack at gmail.com>
>> wrote:
>> > Hey kids -
>> >
>> > So, I've got a relatively simple dilemma that I sure pops up all the
>> > time
>> > for those of you that are way better at electronics than me. I've got a
>> > power supply providing a fixed 24V @ 4.5A, but I only want to use 12V of
>> > that for my circuit. I originally thought I could lower the voltage
>> > using a
>> > potentiometer, but because the power is so high, they all cost some
>> > serious
>> > bank. Is there another (not necessarily analog) solution to changing
>> > voltage
>> > and/or amperage through a circuit that is cheap to build?
>> >
>> > Sorry if this one is likely obvious - but everyone can blame Mitch for
>> > getting me way to into electronics for my own good :).
>> >
>> > Sean
>> >
>> > _______________________________________________
>> > Noisebridge-discuss mailing list
>> > Noisebridge-discuss at lists.noisebridge.net
>> > https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
>> >
>> >
>>
>>
>>
>> --
>> Ryan Castellucci http://ryanc.org/
>
>



-- 
Ryan Castellucci http://ryanc.org/