Hi there.  I'm Jake, relatively new to the list.  I've done my usual
searching to try to figure this out myself, but to no avail, so I
figure that I'd jump in with my first post.

I'm building a simple motor velocity control out of an L6203 h-bridge.
I'm planning on controlling a 12v, 4.75amp motor with said controller.
(yes I know that the 6203 is only 2amp, but I'm planning two in
parallel and my application won't be near that)

I understand the need for a flyback diode.  However, how does a
flyback diode protect against a reversible motor?  I understand how a
flyback diode protects from a "forward to reverse" transition, but not
from a "reverse to forward" transition.

Do I need something more complicated to protect my controller?  Don't
wanna fry my L6203's or my PIC! ;)

I'm planning on using a shottky MBR1645 (45v, 16a) diode as my
flyback, since I've got them laying around here.  Is this sufficient
to avoid smoke clouds when my motors change direction abruptly?

Thanks for the advice.
Jake

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