During a recent trip to Canada, I couldn't figure out why the green lamp was flashing for the first several seconds after switching from red to green. It turns out that is a signal that it is OK to make a left turn, opposing traffic still has a red signal; much like a green left turn arrow. -----Original Message----- From: Andy Kunz To: PICLIST@MITVMA.MIT.EDU Date: Tuesday, July 27, 1999 1:27 PM Subject: Re: Car LED lighting system; PIC filament monitoring > Andy, I'd have thought you'd be paying attention! :-) I was. > Wagner did say flashing XENON light. This is a new technique. Different paragraph. The original said: >Now tell me, isn't the yellow lamp stupid? why not flash the green lamp >during the last 10 seconds of the "green" status? Can you imagine the >savings? Lamps, relays, wires, supports, weight, cables... That is NOT a good idea. The incandescent GREEN LAMP would be flashed for 10 seconds. The filament wouldn't last long. > Ours is on a long straight road that has new cross traffic > and didn't use to have a traffic light at all. Impossible > to ignore, very effective. Probably controlled with a PIC. This is like what I saw used in NC. Andy ================================================================== Andy Kunz Life is what we do to prepare for Eternity ------------------------------------------------------------------ andy@rc-hydros.com http://www.rc-hydros.com - Race Boats andy@montanadesign.com http://www.montanadesign.com - Electronics ==================================================================