
I like this fan build. Only interesting bit was the author build his own PWM controller. Which I think you can pick up pre-made for a few dollars more than the parts.
https://www.instructables.com/id/DIY-Cordless-Table-Fan-From-Scrap/
I like this fan build. Only interesting bit was the author build his own PWM controller. Which I think you can pick up pre-made for a few dollars more than the parts.
https://www.instructables.com/id/DIY-Cordless-Table-Fan-From-Scrap/