From: "William Chops Westfield" Sent: Wednesday, October 19, 2005 6:44 PM > In the short term, do you have any sort of regulated 5V supply that > you can use for testing? A better wall-wart, lab-style supply, or > even a connector into your PC's supply? This would let you find out > pretty quickly if the power supply really IS the problem... I can use my PC power supply, but I was thinking 4 NiMH AA's would work too. They should be around 4.8-5v, and able to handle 2 amps. > I can't help but notice that the suggestions to throw in a 7805 don't > match well with the fact the current supply is spec'ed at 2 amps :-) Yeah I noticed that too. I hadn't looked up the specs of the 7805's yet but I figured at least I was looking at a TO-220 with a hefty heatsink. A few volts a a couple of amps is a big amount to turn into heat. > A lot of LEDs end up using a lot of current. > (Perhaps your problem is even along the lines that your modified code > doesn't cause the LED drivers to consume enough current to keep the > unregulated supply down to a reasonable voltage...) That's an interesting idea, it's quite possibly the problem if the chip is frying due to overvoltage. > You mentioned you have several units - do ALL the power supplies put > out 7+V? It's potentially possible that the particular supply was damaged > somehow... The other units are still sealed in their retail packaging, I haven't measured their power supplies. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist