Where to connect earth ground when there is no earth ground?

Discussion in 'General Electronics Chat' started by tpny, Mar 27, 2013.

  1. tpny

    Thread Starter Member

    May 6, 2012
    Hi, I have a mobile (battery operated) device hooked up to a sensor. The sensor has 2 ground wires (circuit ground and earth ground). For circuit ground I connect to battery's (-) terminal. Where should I connect the earth ground to? (I'm ready to connect that ALSO to the battery's (-) terminal. Should I? Why or why not?)

    Thank you so much!
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    For a battery operated device you don't need to attach earth ground to anything. Just leave it unattached.