This is designed to be a wind-powered node for Meshcore/Meshtastic networks. Disclaimer: This design is still undergoing testing, and so far it has failed to charge itself reliably. The wind conditions where I am testing it are really terrible though (low average windspeed, sheltered area, turbine situated below roof/tree height in turbulence), so in proper conditions it should perform as designed. If anyone builds it and gets it running, do please tell me how it performs!

See overview video here for circuit diagrams: https://www.youtube.com/watch?v=iL6E8QJHeZw

The circuitry has changed a bit since I made the video, the components list is now as follows: Capacitors: 100V 470uF 5pcs Zener (TVS) Diode: 1.5KE91A 1pcs Rectification Diodes: SR5100 5A 100V 12pcs

It uses this motor as a generator: https://www.aliexpress.com/item/1005006317036687.html

This voltage regulator, to regulate to 5V: https://www.aliexpress.com/item/1005005976497776.html

a 2x18650 parallel holder, such as this: https://www.aliexpress.com/item/1005009609871811.html

and this 68x36mm solar panel on top: https://www.aliexpress.com/item/1005007298732132.html

it also requires 2pcs 4mmx8mmx3mm bearings, a length of brass rod OD4mmxL125mm (which will require a crossdrilled hole for the blade hub key pin), and a 4mm to 2mm shaft coupler or universal joint. A universal joint might help reduce friction in the drivetrain.

Included in the images is the layout of the components on stripboard (the strips run horizontally), such that the circuit board fits into the 3D printed housing (the capacitors push through the circular holes in the electronics tray). An image is included of the assembled rectifier/booster board. Note the voltage regulator is soldered perpendicularly onto the perfboard, to fit through the rectangular hole on the electronics tray.

On the PCB layout diagram, the motor input wires go into the three pins (14,1), (14,2), and (14, 3), x and y hole spacing respectively. Study the circuit diagram carefully to figure out where to cut the stripboard traces on the back surface, and note the diode and capacitor orientations shown on the PCB layout diagram. Note the values on the circuit diagram are incorrect, the capacitors and diodes listed above should be used instead. On the PCB diagram, the bank of 12 diodes on the left are all rectification diodes, and the diode on the right hand side is the zener diode that limits the output voltage.

The blades have a wee loop at their tip. This is so that a stay wire or thread may be passed through each blade tip, and tied under tension in order to help prevent the blades from shattering at high speeds. Also, in the root of each blade, there is a slot for an M2x20mm bolt that goes up the blade axis, to strengthen the root (ask me why it needed those additions...!).

The solar panel gets mounted inside the top recess with silicone sealant to keep the water out. I recommend resoldering the panel wires to have a plug on the end of them to make it easy to assemble/disassemble the nacelle.

Fixing hardware includes M2x6 and M3x10 stainless steel self-tapping plastic screws. You might be able to use standard metric thread screws, but the self-tapping plastic specific types are far better for this application. It will also need 2pcs M3 CSK screws for mounting the 18650 holder.

I can't really provide any more images of this at the moment, as it is currently outside in its test location, and (As you can see in the video) dismantling it is a total pain!