Well...when I wrote my email I was about 250 emails behind and I hadn't
hit that response yet :) How do you bond the heatsink to the chip? Is it
just the little finned one that's slightly smaller than an IC?

Josh
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A common mistake that people make when trying to design something
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Jinx wrote:
>
> > Could you replace the discrete darlingtons with an array?
> > Might be easier if you didn't have to solder each individual
> > transistor
>
> That's what the Allegro ULN200x, 25xx and 28xx series are. As I
> noted in a previous post, the problem I found with arrays isn't so
> much with ICs but with the PCB under them. To prevent this fault
> recurring I attach heatsink fins to them, and this works well.

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