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where did you find them?

China! specifically Taobao, and I used a forwarding agent to get them to AUS. I'd been looking for dual coloured small LED 8x8's for awhile now.

 

Lots of little Neodymium magnets. I am experimenting with soldering the little bastards for making electrical snap connectors.

Neodymium's are...Nickel? plated right. My experience is that they can be soldered, but with repeated "snaps" the plating peels off, and that's the end of your magnet. :(

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If the edges are rounded, and the solder comes to, but not over, the top edge, there is mechanical grip and they will hold. Soldering into a well helps with this. I have had the sam eexperience soldering to a surface.... the plating cracks off eventually

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Another possibility with these magnets (4mm diameter) is to swage a little bit of copper brake fluid tube and solder them inside. That should give a pretty solid connection.

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Hmmm. Despite ordering mine on 18th Feb, it's still stuck in "Processing". I suppose that serves me right for sneakily ordering one when it wasn't supposed to be in the store yet!

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@pabigot 

 

That was quick!  They quoted 8 weeks on my order so based on your post I logged in and checked.  Scheduled to ship in about a week. :biggrin:

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It may be mine was expedited because I'd bought over $500 worth of other stuff from them in the last four weeks.  Between TI, Adafruit, Pololu, and Sparkfun my research budget for this year has been completely blown; on the other hand, I've got the pieces necessary for a half dozen complex projects.

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Yes kind of , I built a 3d printer and wanted to mount a light up under the print head.

I looked into using one of the neo pixel rings but they didnt quite fit the dimensons needed.

I also wanted to be able to control it more than just on and off so I put a msp430 on there.

I will post about it once I have them built up and working.

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