/challenges-projects/project14/solarpowerdevices/b/blog/posts/solar-spec---what-s-nextI learned a lot putting together the Solar SPEC unit for the Heat Is On Challenge. I still have some work to do finishing the SPEC unit, but I&#39;ve also thought of some other solar related projects to work on. 1) VI Curve tracer - this is ac...en-USTelligent Community 12https://community.element14.com/challenges-projects/project14/solarpowerdevices/b/blog/posts/solar-spec---what-s-nextSat, 15 Sep 2018 21:41:20 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e9fdceae-50a0-4f48-a078-f5646004042egenebren1<p>Cool plans.&nbsp; Is a camera necessary for a sun tracker?&nbsp; You could mount your reference cell to a pan/tilt&nbsp; base and attempt to find the peak.&nbsp; I have seen a lot of trackers built from photo-diodes, again looking for a peak signal.</p><p>&nbsp;</p><p>On the VI curve tracer, on though that I had was to use a li-ion battery charger with programmable charge current setting to act as a variable load.&nbsp; That way you can command the current and measure the voltage.</p><p>&nbsp;</p><p>Good luck and have fun!</p><p>Gene</p><img src="https://community.element14.com/aggbug?PostID=5505&AppID=210&AppType=Weblog&ContentType=0" width="1" height="1">