Hey Arduino Heads. So I, a noob Arduino user, have just a few quick questions about the NG:
How much current does the Arduino use? I’d guess it might be around 1W worth of power, so at 5v that means about 200mAh. Does anyone know its exact amperage at 5v?
How good/reliable is the built-in voltage regulator? If I’m running an otherwise 12v circuit, do I need to regulate down to 5v before I go into the Arduino to be safe? I’d imagine that I do.
Without involving duplicators or any other outboard chips, there’s 11 usable output pins, correct? This assumes that 0 and 1 are dedicated serial pins; is this right? Can 0 and 1 be used as 2 thru 13 are, or are they only ever for serial? What does AREF do?
Does anyone know what RadioShack part I need if I’m looking for a transistor to toggle a 12v circuit from the NG’s output pins? I pretty much just need to get from the PWM pins to 12v-rated and -regulated LEDs, and I’d prefer a transistor to a relay (less contacts to deal with). This brings up another question:
If my LEDs are rated at 12v and have built-in voltage regulators, will PWM even work, or at least work properly? Wouldn’t these regulators just convert the pseudo-lower voltage signal back to the 12v they like? Is there a simple way for me to get these LEDs to fade via PWM without removing their regulators? I’m married to these particular LEDs as they are 1Watt-powerful and I’ve already bought a whole bunch (had to for budgetary reasons).
Thanks in advance for taking the time to reply. I’m working on a undergraduate music thesis project and am fairly new to this world of hacking and circuit-bending, so I apologize for the basic questions. I can best be reached at email@example.com, but I’ll be checking this thread too.