Minimum power supply for Arduino

Discussion in 'Embedded Systems and Microcontrollers' started by vindicate, Jul 15, 2009.

  1. vindicate

    Thread Starter Active Member

    Jul 9, 2009
    158
    0
    Anyone know what the minimum supply I can use is?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    It depends on the processor present and all the connected hardware. Check data sheets for the current figure - always plan on having a healthy reserve of about 50%.
     
  3. vindicate

    Thread Starter Active Member

    Jul 9, 2009
    158
    0
    I was thinking more voltage wise. It has an ATMega328-PU. I'm not too worried about current at this point.
     
  4. nanovate

    Distinguished Member

    May 7, 2007
    665
    1
    Try looking at the datasheet for the board. The micro can go down to 1.8V but the rest of the board probably either needs 3.3V or 5V plus if it has a regulator then you should add about 2 to 3 volts on top of it.
     
  5. John Luciani

    Active Member

    Apr 3, 2007
    477
    0
    The ATmega328P will operate from 1.8V to 5.5V in. At voltages
    below 4.5V you need to reduce the operating frequency below
    the maximum frequency of 20MHz.Check the safe operating area
    graph in the datasheet.

    (* jcl *)
     
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