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Author Topic: what's lowest current usage possible? (1mA?)  (Read 510 times)
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Hi,

Q1 - What's the lowest current usage you can get to with an Arduino Pro http://arduino.cc/en/Main/ArduinoBoardPro board?  I'm assuming this would be best approached by putting the device into the deepest sleep mode (SLEEP_MODE_PWR_DOWN), in which case the question would be effectively what's the lowest current usage you can get to with an Arduino board in Power Down mode?  The testing I have done with my Arduino Pro in each of the modes show that 1mA is about the lowest, but I'd like to get this down to say 0.4mA?.  

Q2 - Would the Arduino Pro Mini (http://arduino.cc/en/Main/ArduinoBoardProMini) use less current than the Pro?  If yes any ideas how much less (e.g. significant?)

Q3 - If it's not possible with one of the Arduino boards to get down to 0.4mA current usage in POWER DOWN mode, then would be the next easiest microprocessor chip/board/kit to go for that would be easiest for a hobbyist to go to? (one that had a couple of input & output pins, with a hardware interrupt, that is programmable somehow & could be powered by a few AA batteries)

My Measurements with the Arduino Pro

Testing notes:
  • Board is an Arduino Pro
  • Powered using 9V battery
  • Measured using Ammeter in line with battery connection to the board

Background: Would like to get my remote battery-based board to last say 6 months without having to change batteries, which I calculate to require current drain of down to roughly 0.4mA I think (ref also - http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1277637970/2#2)

thanks
« Last Edit: June 27, 2010, 02:47:17 pm by callagga » Logged

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I don't think you connected the grounds, Dave.
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You don't say how you're powering the board, or how you're measuring the current.
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ok - updated my post - thanks
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