Solar panel low voltage detection

Thread Starter

Gnome

Joined Mar 21, 2017
2
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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