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solar cells can someone instruct me where to put the diode pos or neg .in the panel or down stream thanks ? Answered

solar cells can someone instruct me where to put the diode pos or neg .in the panel or down stream thanks ?

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AndyGadget (author)2009-09-06

It doesn't matter which side of the solar cell it goes, as long as it's pointing in the right direction. If it's connected to the +ve of the cell, the band should be AWAY from the terminal. If you're after every last bit of voltage from it, It's best to use a schottky or germanium diode. Normal silicon ones will work but the other types give you around 0.4v more to the circuit.

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user

thanks that was very helpful info ...

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AndyGadget (author)AndyGadget2009-09-06

Usually, it goes before any other circuitry to prevent your rechargable battery discharging through the panel in low light conditions.

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seandogue (author)2009-09-06

technically, it should be located downstream of the panel. There's usually a bar graphic on the diode to show where it's cathode is. That's the side that gets hooked to the load, the other side to the solar cell's + terminal. diode.jpg Agree with Andy on the selection of diode to be used. The lower the diode drop, the better.

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