David VanHorn wrote: >> Usually a diode is added in series with the resistor so that no extra >> current is drawn when the relay is being held closed. > > We looked at this, but we also have to figure in the $0.05/placement > cost, and that makes us favor a dual zener package to snub both relay > coils. Is 5 cents really relevant compared to the cost of a relay? And 5 cents is way out of line for placement cost of a single resistor. > Frequently for us, placement costs far exceed the > component costs. You've got the tail wagging the dog. It sounds like you should be looking for a better manufacturer. 5 cents placement cost for a simple 0805 part i= s out of line. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .