Sean Breheny wrote: > > Just to explain this a bit further... That's a much better explanation; thanks. Each LED has its own current-limiting resistor, but the primary reason they're in parallel rather than series is because the number isn't necessarily constant: there will be from 1 to 10 LEDs in each of the three circuits. Some number may be removed, or may not, and the three circuits may not have the same number of LEDs. -- #ken P-)} Ken Coar, Sanagendamgagwedweinini http://Ken.Coar.Org/ Author, developer, opinionist http://Apache-Server.Com/ "Millennium hand and shrimp!" -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist