Analog Solar Tracker by power Mosfet IRFZ34 + LM339

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The basic operation is essentially that of 2 separate photo sensor circuits in pairs. Each separate sensor circuit has a control pot to set it’s sensitivity for bright sunlight.

It is important to have a thorough understanding of the operation of the circuit in order to be successful in making the correct adjustments for acceptable operation. One must do the adjustments on a clear cloudless day. At the very least wait until the sun is between clouds.

CdS cells have a wide variance in the resistance they exhibit in bright sunlight. Generally the resistance is too low for this type of circuit. I have found that the CdS cells can be modified to have higher resistance by painting the cells with a black marker. I use a Sharpie black permanent marker. I paint this on all sides and edges. If you get too much on it can be removed with fingernail polish remover or acetone.

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http://www.redrok.com/electron.htm#led3x
Thank you.

This entry was posted on Wednesday, November 28th, 2007 at 7:59 am and is filed under Electronic Control, mobile phone. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.