That's nice to say, but I can't modify the basic board. :( Thanks for=20 the comment :) On 12/11/13 5:35 PM, David VanHorn wrote: > There are catch diodes that all feed to pin 9 but you need to zener pin 9 > to gnd. Zener significantly higher than vcoil and lower than 50v --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .