I've done this before but this time all it made was a perm magnet. Took a u shaped piece of rebar, two coils wound in opposite direction. A quick touch of the battery but it doesn't seem to release its magnetism. I have removed the keeper several times but it's still a magnet. Quickest mag I've ever made.
Quote from: JimBoot on 2015.07.15, 13:31:56
I've done this before but this time all it made was a perm magnet. Took a u shaped piece of rebar, two coils wound in opposite direction. A quick touch of the battery but it doesn't seem to release its magnetism. I have removed the keeper several times but it's still a magnet. Quickest mag I've ever made.
Dear Jim.
You probably found a bit of Re bar with a higher Carbon content. The first PM's were made from High Carbon Steel. You need to find a piece of Wrought Iron or better still Pure Iron.
It'll work then !! ;) O0
Cheers Grum.
Quote from: Grumage on 2015.07.15, 15:36:28
Dear Jim.
You probably found a bit of Re bar with a higher Carbon content. The first PM's were made from High Carbon Steel. You need to find a piece of Wrought Iron or better still Pure Iron.
It'll work then !! ;) O0
Cheers Grum.
Agreed!
Thanks grum!
Ferrite works too. Not as strong, but definitely works.
https://www.youtube.com/watch?v=tvi5yBZfeFk
I think I just wound the coils in the same direction and linked them as end of one to start of the other. The 2 ends then become where power goes to.
Agreed !!
https://www.youtube.com/watch?v=dWXMxAOFW-w
O0
Cheers Grum.