On 22 December 2014 at 16:19, Sean Breheny wrote: > Russell, > > Was the sound coming from the battery or the relay? Was the relay initial= ly > open and then closed after the battery was connected? > Relay was actuated after battery had been connected across open contacts. Stupid error while playing with a rats nest prototype on workbench. Sound was loud and 'brissant". Stopped too soon to locate by sound. The smell and belated logic led me home :-). R --=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 .