Where to find memory wire?

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Where to find memory wire?

Postby pete12345 » Mon Jun 22, 2020 6:46 pm

About 10 years ago now, I tinkered a bit with operating points and signals using 'memory wire' which changed length when current was passed through it. A spring pulled it back when the power was switched off. I liked the system as the wiring was straightforward and the cost was significantly less than any of the slow-action motors available at the time, as well as being totally silent in operation.

Now though, it seems to have fallen out of fashion and I can't find it anywhere. The only results for memory wire come back with things for making bracelets.

So does this stuff still exist? Where can I find it? Used to be that you could buy a kit with various springs, angle cranks and crimp connectors, but can't remember the source and in any case it's gone now.
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Re: Where to find memory wire?

Postby heda » Mon Jun 22, 2020 7:00 pm

Try googling 'nitinol wire', whether the jewellery stuff has the same properties I've no idea.

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Re: Where to find memory wire?

Postby RFS » Mon Jun 22, 2020 7:28 pm

If you search for "memory wire" on Ebay you get nearly 800 hits ...
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Re: Where to find memory wire?

Postby Ironduke » Mon Jun 22, 2020 10:54 pm


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Re: Where to find memory wire?

Postby Bufferstop » Tue Jun 23, 2020 11:03 am

There's a lot of work involved in producing a self contained "actuator" based on memory wire. Servos and stepper motors are now available at afford able prices to consign memory and muscle wire to the history of analogue devices. Me, I've gone back to iron rods and steel wire to connect my input to points and signals.
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