- Fan - 12 Volt, 0.25A PC Fan from an old PC case that I found
- Capacitor - Large 25V capacitor ripped out from the old computer I found. Just look through any old electronics and take out the largest one you can find the is rated above 20 Volts (written on the side of it). The one found was 4700uF is probably overkill but eh.
- Wire - I had some lying around as I'm sure you do.
The wiring is as. Connect the positive from the panel to the positive on the capacitor to the positive on the fan. Then the negative on the panel to the negative on the capacitor to the negative on the fan. The panel will power the fan and any excess power will build up in the capacitor, like a small battery. When a shadow crosses the panel, the build up in the capacitor keeps the fan going, so the when the panel gets sun the fan should run pretty smoothly, which makes for better air flow. I cut a hole in the base and lid of the box and hot glued the parts in.
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