by Dave Booth » Tue Feb 23, 2016 10:54 pm
A while back, I was having problems with small parts sticking to my tweezers and screwdrivers, so I decided it was time to create a demagnetizer. A little digging around in my junk box turned up an old Black and Decker pistol drill from the mid 1950's, with bearings that were nothing more than a fond memory. So I snatched out the field coils, and wired them together in series. Coming up with a suitable power supply was a little harder, but then I remembered I had a Sola Constant voltage transformer in the basement, that had a 110 V primary, and a 19V secondary. A few pieces of scrap brass as non-magnetic standoffs, and a piece of angle iron, so the thing would stand up with the coils horizontal, and I was in business. It isn't very elegant, but it does the trick. And, it turns out the inside of the coils is just the right size for a medium sized pill bottle from my local pharmacy to slide in, so when I want to demagnetize small parts, I just put them in that and seal the cap so that they don't "dance" out onto the floor.
- Attachments
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- Demagnetizer 02 - Copy.JPG (39.34 KiB) Viewed 6165 times
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- SOLA 19v Trf - Copy.JPG (32.95 KiB) Viewed 6165 times
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- Demagnetizer 01 - Copy.JPG (35.52 KiB) Viewed 6165 times