Solar panel low voltage detection

Discussion in 'The Projects Forum' started by Gnome, Mar 23, 2017.

  1. Gnome

    Thread Starter New Member

    Mar 21, 2017
    2
    0
    Hello,
    I would like to use the solar panel from the below circuit - screenshot picture attached - to turn on the circuit when the solar panel reads about 100mv.

    I have made the circuit and it works fine, but it turns on the LED too soon. Still not quite dark. In using the one with the NIMH batteries.

    When I measure the voltage from the solar panel (disconnected from the circuit) at the darkness level I would like it to turn on, the solar panel reads about 100mv.

    Is there a simple way to do this? Maybe using a Mofset since it is voltage based? I can't seem to figure it out.

    And I don't want to use a LDR.

    Here is the website where I found the circuit.
    http://www.evilmadscientist.com/2008/simple-solar-circuits/comment-page-1/

    Any help would be appreciated!
     
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