Electromagnets Make Vertical CNC Cutter A Little Stickier

Workholding is generally not a problem on a big CNC plasma cutter.; gravity does a pretty good job of keeping heavy sheet steel in place on the bed. But what if your CNC table isn’t a table? …

Vibratory Rock Tumbler Bounces On Printed Spring

If you’re reading Hackaday, there’s a good chance you had a rock tumbler in your younger days. Hell, we’d put odds on a few of you having one rumbling away in the background as yo…

Sort Of Electromagnet Attracts Copper, Aluminum

It is a common grade school experiment to wind some wire around a screw, power it up, and watch it pick up paper clips or other ferrous materials. It is also grade school science to show that neith…

Handle Sheet Metal With The Power Of Microwave Oven Electromagnets

For those of us who don’t do it every day, handling sheet metal can be a nerve-wracking affair. Sheet metal is thin, heavy, and sharp, and one wrong move while handling it can have much the s…

Levitating Banana Is An Excellent Conversation Starter

“I really like your floating banana.” If that’s something you’ve always wanted your guests to say when visiting your living room, this levitating banana project from [Electr…

Propel Paper Planes, Bisect Sausages With Electromagnets

Are you still launching paper airplanes using your hands? That’s like a baby’s toy! [Tom Stanton] and his homebrew electromagnetic rail launcher are sure to bring your paper airplane ga…

Is This 12-layer PCB Coil The Next Step In Ferrofluid Displays?

[Applied Procrastination] is in the business of vertical ferrofluid displays, but struggles somewhat with the electromagnets available off the shelf and the proliferation of wiring that results. [C…

DIY Machine Enables PEMF Therapy On A Budget

We’re certainly not qualified to say whether or not pulsed electromagnetic field (PEMF) therapy will actually reduce your stress or improve your circulation, but there seems to be enough legi…

Ferrofluid Display Gets New, Better Driver Circuitry

In 2019 [Simen] and [Amud], two students from the University of Oslo, set out to design a unique open-source display. The result was Fetch, a display that uses electromagnets to suspend ferrofluid …

A 3D Printer With An Electromagnetic Tool Changer

The versatility of 3D printers is simply amazing. Capable of producing a wide variety of prototypes, miscellaneous parts, artwork, and even other 3D printers, it’s an excellent addition to an…