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How much Current does an Arduino Duemilanove Draw? Answered

How much Current(in MA) does an Arduino Duemilanove Draw While:
  • Running Blinkenlight?
  • Running code not turning any lights on?
Also How much would it draw under those conditions when it is receiving 5V and through the regulator in the DC jack?



Best Answer 8 years ago

measured 18.7 mA just now, powered from an FTDI breakout board.  For curiosity, a mini powered the same way is drawing 18.4.


8 years ago

That golden-looking resistor at the power side is actually a fuse.

Acording to the website it draws around 40ma per digital port, and it needs 1A from the power supply jack to run at max, so if you can supply it with 1A or just use a multimeter to measure.

assuming it can be succsefully powered from a usb port, i would say 100ma it could be anywhere up to 500ma though but i dont think it has any part of it that needs that much power... according to technical specs, dc jack works with 40 - 50 ma

Thanks, Maybe average about 70Ma?

The simple answer is to strap a millammeter on and measure it at the source. Failing that, you'll have to break down the current needs of all the components: The ATMega draws under 1mA (it's 0.3mA in the datasheet) then add the USB interface (another 0.1mA). I would suspect that what ever load you have running (LEDs etc) will account for 99% of the current requirements.

I suppose, I would say more like 75% because there are 3 LEDs, A regulator, and a crystal...

Bump, This is really pathetic.

Bump...I don't want to have to do this...

...Bump... :(