I'm new here in the Forum and I'm not sure if this is the right section, but anyway ;-)
I'm a student from Switzerland. As a school project I have built some dye-sensitized solar cells. Now I want to build a measuring system for these cells with an Arduino board (to measure the IV-curve of the cells).
In the Internet I searched for a kind of Sourcemeter builded with an Arduino controller and I have found this article about building a DIY IV Tester with Arduino:http://pv.mit.edu/education/ivtester/
The resolution (for the current) of this IV Tester is +/- 30mA. My solar cells are really small - and not as efficient as a silizium solar cell - for that I only get a current in the range of about 50-200 micro-Ampère...
Now my question: Is it possible to modify this DIY IV Tester to be able to measure µA (micro-Ampère)?
Or is there a better solution for measuring the IV-curve of my solar cells in the range of µA?
I would welcome your response!