Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced into 500+ categories.
We have searched the web to help you find quick solutions & design ideas.

Got Designs?
Please eMail
if you want me to link to and/or post your original design
NOTE:  We make every effort to link to original material posted by the designer. 
Please contact us if our link is not to your site!  Thanks.

DiscoverCircuits.com -- Hobby Corner
Last Updated on: Tuesday, June 01, 2021 03:06 PM

Hobby Circuits List

The contents & graphics of Discovercircuits.com are copyright protected.
LINK to Dave's circuit, but DO NOT COPY any files to your WEB SITE server

More  Solar Cell Circuits  Tester Circuits

Solar Cell Test Fixture Circuit

If you are considering building your own solar panel, you might try building the solar cell tester shown below. When constructing a solar panel it is important to make sure that all the solar cells used in the panel be closely matched for their short circuit current. One weak cell will lower the efficiency of the whole panel. The system shown allows individual solar cells to be tested for their short circuit current under a constant light intensity condition. The system uses a low voltage 2550 watt halogen spot light to simulate the light from the sun.
A small PIN photodiode is placed in the path of the light from the lamp and is connected to a circuit, which converts the light intensity collected by the diode into a voltage. Another circuit compares that voltage to a reference. The error signal is fed to a pulse width modulation circuit, which controls the amount of power fed to the lamp. The result is a uniform light source, whose intensity remains fixed. The system can be calibrated to produce a light intensity equal to one sun.
The assembly could be made from piece of plywood with cutout for the test area. A bracket of some kind could hold the lamp assembly below the window. Id recommend a piece of high temperature frosted glass as a light diffuser to insure a more uniform light pattern. I think a glass window area about 6 inches by 6 inches would be big enough for most solar cells. The current generated by the solar cell under test is measured by any digital multimeter, which can measure a few Amps of current.  I will add the complete control circuit for this system later.

Solar Cell Test Fixture, circuit designed

 by David Johnson, P.E., July 9, 2006

Click on Circuit Below to view PDF of Schematic


Circuit SCHEMATIC SOLAR TEST FIXTURE



More  Solar Cell Circuits  Tester Circuits

Hobby Circuits List
eMail David A. Johnson, P.E. about this circuit


HOME Schematics Index Hobby Corner Dave's Circuits Contact Info
Imagineering Ezine Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy

Copyright  January, 1998 - June, 2021     David A. Johnson  All Rights reserved. 
 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.