Unable to Power DC motor via Arduino with 2 AA Batteries

Discussion in 'General Electronics Chat' started by Kannan Ravi, Dec 18, 2014.

  1. Kannan Ravi

    Thread Starter New Member

    Dec 18, 2014
    1
    0
    I am using 3.7 V 2000mah battery.
    I am stepping it up to power an arduino board via an NCP1402. It has a continuous output current of 200mA.
    I am trying to run two Micro Metal Gear motors with stall current 700mA. This setup works fine.

    However when I try to use 2 AAA batteries and power it up, it does not seem to run the motors.
    Any idea why? Any ideas as to how to overcome this issue?
    Thanks!
     
  2. sirch2

    Well-Known Member

    Jan 21, 2013
    1,008
    351
    What type of AAA's are you using? NiMH are only 1.2v
     
  3. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    And look up the current rating of AAA batteries. Even if you can start the motor(s), AAAs could only run the Arduino board (without motors) for ~30min.
     
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