I'm using a 12v fan and 12v LED modules in my project, so I need about 400mA by their combined specs. I have a 12.6v dc regulated power source that can give ~700mA I wish to use, and since it has a rather small form factor I would also like to power my Arduino Diecimila with it. I'm using PWM from pins 10 and 6 to go through N-channel MOSFETs in order to control both the LEDs and the fan. Anyway, in the Arduino Diecimila board page it says the recommended voltages are between 7-12v, and beyond that it can handle 6-20v, but it might cause the voltage regulator to heat too much, which might damage the board. So, my question is that: will 12.6v really damage my board, or is it within some margin of error? The actual voltage I got when I checked my power supply was 12.55V. Can I maybe just dial it down a bit somehow?
Thanks in advance,