Category Archives: electromagnet

Magnets Turn Flexible PCB Into Electric Grasshopper

Just because something doesn’t seem to have an apparent purpose, that doesn’t mean we shouldn’t try making it anyway. As flexible PCBs become cheaper and easier to order from low-scale fab houses, we’re seeing hobbyists experiment with new uses for them such as [Carl Bugeja]’s jumping circuit.

The circuit is …read more

Continue reading

Posted in electromagnet, flexible circuit board, flexible PCB, flexible robotics, hardware, magnets | Leave a comment

Inverse Kinematics Robot Arm Magna-Doodles The Time For You

Following a surge of creativity fueled by the current lockdown, [Diglo] writes in with his tabletop clock driven by a robotic arm drawing on a Magna Doodle tablet. And if you have one of those still lying around with some old toys and don’t mind cannibalizing it for the project, …read more

Continue reading

Posted in clock, clock hacks, custom clock, drawing clock, electromagnet, inverse kinematics, magnadoodle, magnet, robot arm | Leave a comment

This V8 Makes a Shocking Amount of Power

As a work of art, solenoid engines are an impressive display of electromagnetics in action. There is limited practical use for them though, so usually they are relegated to that realm and remain display pieces. This one from [Emiel] certainly looks like a work of art, too. It has eight …read more

Continue reading

Posted in camshaft, coil, crankshaft, electric, electromagnet, engine, Engine Hacks, lathe, machine, solenoid, v8 | Leave a comment

A Tin Can Phone, but with Magnets

The tin can phone is a staple of longitudinal wave demonstrations wherein a human voice vibrates the bottom of a soup can, and compression waves travel along a string to reproduce the speaker in another can at the other end. All the parts in this electrical demonstration are different, but …read more

Continue reading

Posted in coil, electromagnet, magnet, microphone, musical hacks, solenoid, speaker, voice coil | Leave a comment

Tracking Wasted Time With A Ferrofluid Clock

We know this project is supposed to be about developing a fine-looking ferrofluid clock, and not about the value of procrastination. But after watching the video below, see if you don’t think that procrastination has taken these two students further than expected.

We first ran into [Simen] and [Amund] several …read more

Continue reading

Posted in brine, Chemistry, clock hacks, electromagnet, ferrofluid, magnet, misc hacks, Procrastination, Teensy | Leave a comment

Solenoid Engine Adds Three “Pistons”

The earliest piston engines typically had only one cylinder, and at best, produced horsepower measured in single digits. But once you have a working engine, it’s a relatively short step to adding cylinders and increasing the power output. [Emiel] made a similar upgrade to one of his engines recently, upgrading …read more

Continue reading

Posted in camshaft, coil, crankshaft, electric, electromagnet, engine, Engine Hacks, lathe, machine, solenoid, v4 | Leave a comment

Voice Chess Uses Phone, Arduino, And An Electromagnet

[Diyguypt] may be an altruist to provide the means for people who can’t manipulate chess pieces to play the game. Or he may just have his hands too busy with food and drink to play. Either way, his voice command chessboard appears to work, although it has a lot of …read more

Continue reading

Posted in android, arduino, Arduino Hacks, chess, electromagnet, voice command, voice control | Leave a comment

The Surprising Tech Of A Cheap Toaster

How complicated can a toaster be? You can get a cheap one for way under $10 that is little more than a hot wire. However, there are a few little complications. First, consumer products need to be safe — lawsuits are expensive. Second, there has to be some mechanism to …read more

Continue reading

Posted in electromagnet, teardown, timer, toaster | Leave a comment

Old Meets New In 3D Printed Telegraph

We often think of 3D printing as a way to create specific components in our builds, everything from some hard-to-find little sprocket to a custom enclosure. More and more of the projects that grace the pages of Hackaday utilize at least a few 3D printed parts, even if the overall …read more

Continue reading

Posted in 3d printed, 3d Printer hacks, classic hacks, electromagnet, mosfet, telegraph, vintage | Leave a comment

Turn Old Pinball Parts Into A Unique Digital Clock

It’s getting ever harder to build a truly unique digital clock. From electronic displays to the flip-dots and flip-cards, everything seems to have been done to death. But this pinball scoring reel clock manages to keep the unique clock ball in play, as it were.

It’s not entirely clear whom to credit with this build, but the article was written by [Lucky]. Nor do they mention which pinball machine gave up its electromechanical scoring display for the build. Our guess would be a machine from the ’60s, before the era of score inflation that required more than the four digits …read more

Continue reading

Posted in classic hacks, clock hacks, coil, DS3231 RTC, electromagnet, ESP8266, MOSFETT, pinball | Leave a comment