Simple Magnetic Levitator

[Stoppi] always has exciting projects and, as you can see in the video below, the latest one is a very simple magnetic levitator design. The design is classic and simple: a 5 V regulator IC, a Hall…

Spy On Your Cat To Make Sure It Gets Its Paws In

[Scott Cutler] has a young cat, [Cygnus], that loves to run on a cat wheel and [Scott] had some some important questions about [Cygnus]’s usage of the cat wheel like, how often it’s use…

A More Expressive Synth Via Flexure

Synthesizers can make some great music, but sometimes they feel a bit robotic in comparison to their analog counterparts. [Chris Guichet] built a “minimum viable” expressive synth to ov…

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…

Don’t Lose Your Cool With This Fridge Buzzer

[CarrotIndustries] wanted to add an audible warning for when the refrigerator door was left open. The result is a fridge buzzer that attaches to the inside of a fridge door and starts buzzing if th…

Tracing In 2D And 3D With Hall Effect Sensors

Pantographs were once used as simple mechanical devices for a range of tasks, including duplicating simple line drawings. [Tim] decided to make a modern electronic version that spits out G-Code ins…

3D Printed Maglev Switches Are So Hot Right Now

It doesn’t happen all the time, but over the years we’ve noticed that once we feature a project, a number of very similar builds often find themselves in our tip line before too long. O…

Practical Sensors: The Hall Effect

Measuring a magnetic field can be very easy with some pretty low tech, or it can be very high tech. It just depends on what kind of measurement you need and how much effort you want to expend. The …