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How many amps are required to run an arduino mega?

I can't find the info on the spec sheet.

http://arduino.cc/en/Main/ArduinoBoardMega
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I can't find the info on the spec sheet.

That's because the actual current used is mostly determined by what and how you interface with external sensors, output devices, etc.

The active current users on the board are the AVR chip, the FTDI chip, the +5vdc regulator and a few miss components. I would guess the board overhead current to be in the 50-100ma range.

Lefty
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If I have 36 servos on each arduino does that change anything?

They all have an independent power supply I am just controlling them with the Arduino. The rest of the pins are all inputs for sensors.
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Not if you are using an external power supply for all the servos, should work fine. However that will need to be one large external power supply as 36 servos can really eat up current, esp is they are all allowed to be able to move at the same time.

Lefty

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When I was looking to see if my arduino powered clock could run off batteries, i measured it in the 20-30 mA range.  And that was a decimillia and 3x 1 mA meters.  
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