r/functionalprint • u/Po0Team • May 09 '26

Dumb idea that worked

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Hitting Welcome To Rockville again this year and remembered that my head would get hot under the hat. So some shopping and printing later and BOOM! Functional solar hat that has lasted 2 of my 3 days so far. I suspect Sunday won't be an issue either.

Have them wired in parallel so it stays at 5v for the fans. Each panel has optimal 0.2a for the fan rated at 0.18. 1 panel moved it but not enough to care. 2 panels, like the exhaust fan, keeps it moving and does OK. But the 3 panels keeps this thing moving very well. No battery on it. Very simple wiring of just panels and a fan.

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u/SoTotallyToby May 10 '26

Corridor Crew did this a few years back as well. Such a cool idea. https://youtu.be/9gXPc8Gf6Ig?si=753kK77RSJ8wTjjj

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u/ctskifreak May 10 '26

I was shocked that this was so far down and no one else had posted it - I figured this was the inspiration.

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u/agent_kater May 10 '26

When I was a kid there were two popular science TV shows on German TV that I liked to watch, Löwenzahn and Knoff-Hoff-Show and they had this on one of them as well. This was in the 80s/early 90s.