Strange little thing

Community General Discussions
1

After taking apart all the old HDD's i ended up with a small piece that took me a little to figure out.

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I stuck 5 volts on the wire and nothing happend. Well that's what seemed. Inside the copper sleeve is a small magnet. Tiny but it holds few grams. So I tried again, this time with the magnet holding a metal o-ring. And yes, with 5 volts it looses its magnetic capabilities. Amazing.

What a boring piece of kit.

Maybe suitable for a little spring operated hatch or a magnetic switch.

2

looks like the pickup coil

looks like the pickup coil for the spindle motor

3

Cool, an inverted electro

Cool, an inverted electro magnet!

4

Neat!!

There are physical magnets that you can “turn on” or “off” with a dial on the magnet but I have never seen one done electrically. I will have to try building a maglock with that property that is switched electrically.