- #1
nova_n
- 2
- 1
Hello! first post!
So my copper wire is 24 gauge, aka 0.51mm diameter. And the spool was filled to the full volume of the cylinder. In the finalized coil, the portion in between the walls is 7.75cm in length, and the coil(not the black walls) is 7.5 cm. I found that by taking the diameter of the walls and subtracting it from the length of a line that goes up from the red wire, all the way to the edge. The hole in the black spool is about 1.75 cm. Approximating the coil as many circles stacked onto each other, i have 112 layers, and 151 coils per layer. This means i have approximately 16912 turns.
I made sure the turns ALL go in the same direction
However, when i use my 90 lb pull force cup magnets, and make sure that the changing field is parallel to the coil, i can only induce 0.2 volts moving it slowly.
When he was building it, he only used 300 turns,didn't have an iron/steel core, and used weak ceramic magnets. And he even spun the magnets slowly, and managed to get 1.5-3 volts out of it.
I tried spinning my cup magnets with the power drill that can go 700 rpm max, and that actually induced less voltage.
I suspect there may be breaks in the enamel, but I couldn't see them. That wouldn't make sense though, because it could pick up a spoon when i turned it into an electromagnet with 18v running through Any input on what went wrong?
So my copper wire is 24 gauge, aka 0.51mm diameter. And the spool was filled to the full volume of the cylinder. In the finalized coil, the portion in between the walls is 7.75cm in length, and the coil(not the black walls) is 7.5 cm. I found that by taking the diameter of the walls and subtracting it from the length of a line that goes up from the red wire, all the way to the edge. The hole in the black spool is about 1.75 cm. Approximating the coil as many circles stacked onto each other, i have 112 layers, and 151 coils per layer. This means i have approximately 16912 turns.
I made sure the turns ALL go in the same direction
However, when i use my 90 lb pull force cup magnets, and make sure that the changing field is parallel to the coil, i can only induce 0.2 volts moving it slowly.
When he was building it, he only used 300 turns,didn't have an iron/steel core, and used weak ceramic magnets. And he even spun the magnets slowly, and managed to get 1.5-3 volts out of it.
I tried spinning my cup magnets with the power drill that can go 700 rpm max, and that actually induced less voltage.
I suspect there may be breaks in the enamel, but I couldn't see them. That wouldn't make sense though, because it could pick up a spoon when i turned it into an electromagnet with 18v running through Any input on what went wrong?
Attachments
Last edited: