On Wed, Feb 22, 2012 at 11:03 PM, V G <x.solarwind.x@gmail.com> wrote:
> On Mon, Feb 13, 2012 at 6:35 AM, <alan.b.pearce@stfc.ac.uk> wrote:
>
>> For extra brownie points make a project out of a PIC that has a 12 bit
>> ADC, and a keypad for setting the voltage, and maybe also current limit,
>> and be able to display both current and voltage.
>>
>
> Sounds like my next project. I should be able to get the PIC to drive a
> switched mode power supply with its PWM, but I don't know how to make a
> switched mode power supply and how to calculate the PWM values and stuff =
to
> create voltage/current/whatever.
>
> Any hints?

I think the previously mentioned EEVblog series on power supplies
should do the trick, of which episode 4 addresses PWM:

http://www.eevblog.com/2011/12/07/eevblog-225-lab-power-supply-design-part-=
4-pwm-control/

-Eric
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