Josh Koffman wrote:
> Hi all. I might be called on to help out with a project. The part I'm
> most unsure about is that the intensity of a 24V 250W light bulb will
> need to be controlled, preferably by a PIC. It's being supplied by a
> 24V battery.
>
>  I'd love to be able to find a compact, ready made module that would
> do this part for me. Digital (ie serial data, etc) control would be
> ideal, but analog might be possible. Alternatively I could use the CCP
> module to generate some PWM, but I'd need a driver. The reason I'd
> like a module is that in the event of a problem it would be easy to
> swap out. I've done some searching and what I'm finding are a ton of
> smaller modules meant for dimming LEDs.
>
> Alternatively I could use PWM and some sort of home built driver. The
> circuit here: http://www.solorb.com/elect/solarcirc/pwm1/ suggests the
> use of a FET. Having never controlled this large a DC load before, I
> have no idea if this is a good or bad idea. Any thoughts?
>
> Thanks for the help!
>
> Josh
>   
take a look at robot powers simple-H its probably in the ball park, feed 
it with a PWM from the PIC and you should be set.

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