>  Why not use a bridge rectifier?  That way it doesn't matter which way
>  it's connected.  And you can use either AC or DC.

That leaves the problem of where the back-emf energy has to go. The
bridge won't let it get back to the battery.

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist