Mini 5v Generator Using 12v Printer Motor

thingiverse

I'm tinkering with a generator that can be paired with windmill blades. For now, I've got a handle on it, literally. It's built around a salvaged 12v printer motor and a pair of 4 x 608zz bearings, which I suspect were originally rollerblade bearings. To secure the top of the motor mount, I used a clip. The goal is to integrate a couple of small 6v solar panels into the system and transform it into a more robust and efficient setup that charges a lipo battery and powers a light or charges a cell phone. Interestingly, this setup proves surprisingly efficient. With the handle, I can easily generate 3-4 volts. I've connected it to the electronics from an old solar e-cig charger, which includes solar panel inlets, a built-in white LED flashlight, a lipo battery, and charging circuit. As you can see from the photos, it's generating enough power to operate. With a larger main gear, this system could be made even more efficient. Currently, I estimate the ratio is 10:1, but the main gear reached its maximum size limit on my printer. Next up, I'm designing lightweight blades to spin it.