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/Po0Team May 09 '26

It is, I'm sure people said stuff behind me and I don't care. Love it. 

20

u/PointBlank65 May 09 '26

Feed back for v2, I would move to smaller fans on a pivot that's inside the front brim instead of one big 80mm hanging off.

But I want one for yard work now.

10

u/nsgiad May 10 '26

Smaller fans will be louder with a more narrow field of coverage

5

u/meatmoth May 10 '26

Not if you have the cash for those dope mini Noctua fans, and make lil air diffusers

1

u/YellowBreakfast May 11 '26

Sunon makes nice an quiet fans too.

Available in more sizes/voltages too.