Easy to make slipring for wind turbine
2 small bearings (obtained from a kids scooter wheels)
2 lengths of wire (red and black(but is optional))
Some kind of non conductive spacer( i used a rubber ring from a pack i got for £1)
a plastic bottle
Soldering iron (optional) was difficult to solder to the bearings
Step 1: Layout of Bearings and Ring
Here you will need the 2 bearings and the non conductive ring.
The centre hole in the ring needs to be bigger than the inner bearing so it doesn't rub when turned.
Place the ring in the middle of the two bearings and hold together with something ie a clamp.
Cut your red and black wires in half and solder 1 red wire to 1 bearing and 1 black wire to the other
Tightly wrap with electrical tape
Step 2: Finishing Off
Cut some strips from the bottle the same width as the bearings and ring, doesn't matter about length
Solder the other red and black wires to the inside of the bearings corresponding to the 2 that you just soldered.
wind up some of the plastic strip and insert it into the middle, this should then unwind to hold the wires in tightly. Insert more if needed.
At this point its done, but I would suggest checking the connections between all points before wiring it up.