Hello, I've achieve a program that can control 9 LEDs. When they are charged by USB, always run well; but if charged by alternative, after about 3 mins, all runs strange. I'm new to use the arduino, I've no idea about this problem. I use arduino Duemianove. Thanks advance,

the problem about charged by USB and alternative

cmiyc September 29, 2010, 4:58pm 3

What voltages are you using when not connected by USB and where are you connecting them?

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