designing circuit with two power sources, thermal battery and external

Discussion in 'The Projects Forum' started by Rashed ali, Dec 16, 2015.

  1. Rashed ali

    Thread Starter New Member

    Dec 16, 2015
    1
    0
    please I need a solution in designing circuit that use two power sources??

    the first source is the external source from ground, this source should feed the power board without going into thermal battery,

    then we the body is unattached from the ground, the thermal battery which is internal source should feed the power board with same current and voltage which is 24v

    thanks
     
  2. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    5,001
    745
    Put a diode in series with the battery, or use a changeover power socket.
     
  3. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    There are ways to avoid the voltage drop in the diode but they are more complicated than this simple solution.
     
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