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Is this a Toroid Bead and can it be used for a joule thief?

I found it at the end of a power chord.

Picture of Is this a Toroid Bead and can it be used for a joule thief?
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lemonie7 years ago
It's a ferrite thing, I've got one - it was on a cable at some point. Yeah, give it a go.

L
coolpizzadude (author)  lemonie7 years ago
thanks.
jpagatpat6 years ago
How about if my ferrite is big? should I make more turns??
NachoMahma7 years ago
.  It's not actually a toroid (donut) (check the first two links here), but it does appear to be ferrite. It probably won't work as well as a toroid, but it should work.
coolpizzadude (author)  NachoMahma7 years ago
I just solderd it together tonight and it worked thanks.
Should do.