IOT

The Other Kind Of Static Hazard to Your Logic Circuits

We’ve all heard of the dangers of static electricity when dealing with electronics, and we all take the proper precautions when working with static-sensitive components — don’t we? But as much as we fear punching an expensive hole in a chip with an errant spark, electrostatic discharge damage isn’t the only kind of static hazard your digital designs can face.

IOT

Flaming Skull Hood Ornament Is Not Suitable For Use In Traffic

It’s one thing to mount a big skull—human or animal—to the front of your car. Really, though, a good hood skull should breathe fire to truly inspire enmity or awe. Thankfully, when [Anthony] went about modifying his ex-school bus, he was sure to equip it with suitably flaming equipment. It’s dangerous, so don’t try this one at home and melt

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Math Book Gets Real with Complex

The [Math Sorcerer] loves books. His latest acquisition is the famous Real and Complex Analysis, which is a very stout math book.  How stout? Well, there are several chapters on holomorphic functions, including how to do a Fourier transform on such a function. There’s also an appendix about Hausdorff’s maximality theorem. What are those? Beats us; read the book. You

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Bluetooth Device Visualizer Reveals Devices In Vicinity

Have you ever wondered how many Bluetooth devices are floating around you? You could use one of those creepy retail store Bluetooth tracking systems, or set your smartphone to scan. Alternatively, you could use the Bluetooth Devices Visualizer from [Jeremy Geppert]. The device was inspired by [Jeremy’s] trip to Hackaday Supercon 2022. Wanting to build something with LEDs that worked

IOT

PC Case Makes Portable Power Supply

Recently, we’ve seen a lot of semi-portable power stations. These have some big rechargeable battery and various connection options. [Dereksgc] wanted to make his own and decided the perfect housing would be a small PC tower case. (Video, embedded below.) It makes sense. There are plenty of easy-to-work front panel inserts, a power supply box with an AC cord (the

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The Wirtz Pump Spins

Over the ages, a lot of human activity has been concerned about getting water from where we find it to where we want it. If you want to move water to a lower elevation, there’s no problem. But if you want to move water up, you need a pump. The ancients used what we call Archimedes’ screw to raise water.

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We’d Sure Like to Strum the Chrumm Keyboard

If you want something as personal as a keyboard done right, you have to do it yourself. Not quite satisfied with the multitude of mechanical offerings out there, [summific] decided to throw their hat into the ring and design the Chrumm keyboard. And boy, are we glad they did. Between the lovely tenting angle and tilt, the gorgeous flexible PCBs,

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Testing Oxide Etchants for the Home Semiconductor Fab

Building circuits on a silicon chip is a bit like a game of Tetris — you have to lay down layer after layer of different materials while lining up holes in the existing layers with blocks of the correct shape on new layers. Of course, Tetris generally doesn’t require you to use insanely high temperatures and spectacularly toxic chemicals to

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You Can Use An Old Tape Deck As A Distortion Pedal

Distorted guitars were a big part of the rock revolution last century; we try to forget about the roll. As a youth, [David Hilowitz] couldn’t afford a loud aggressive amp, a distortion pedal, or even a proper electric guitar. This experience ended up teaching him that you can use random old audio hardware as a distortion effect. [David’s] guitar journey

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Spinning CRT Makes a 360 Degree Audio Oscilloscope

A question for you: if the cathode ray tube had never been invented, what would an oscilloscope look like? We’re not sure ourselves, but it seems like something similar to this mechanical tachyscope display might worked, at least up to a point. What’s ironic about this scenario is that the tachyscope [Daniel Ross] built actually uses a CRT from a

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Building a Rotating Display Plate From A Lazy Susan

A rotating table is a super nifty tool for all kinds of photography and videography purposes. [Handy Bear] built a super simple example using some parts from IKEA. The build starts with a Snudda, which is IKEA’s version of a Lazy Susan. It’s fitted with a 3D-printed gear to allow it to be easily driven. The platter is then fitted

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It’s Time You Built a Smart Pocket Watch

There’s just something about a pocket watch that screams class compared to the barbaric act of bending your arm, or the no-fun way of looking at your phone. But smartwatches are dumb, analog things that mostly look pretty. Or are they? [JGJMatt] proves otherwise with their stunning DIY smart pocket watch. It is essentially a cheap smart watch from Amazon

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China May Have a New Submarine Tracking Technology

Submarines have always been about stealth; that’s always been the whole point of putting them underwater. Tracking them can be difficult, even to this day, but China may have a new technique to help in this endeavour, as reported by the South China Morning Post.

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Breaking Land Speed Records With An RC Car

Building and running a land speed record car is an expensive business that requires incredibly wealthy benefactors. Doing it on a smaller scale with a radio control car is still pricy, but more within the reach of the individual. [ProjectAir] has been working on just that, and recently set out to break records with a car of his own design.

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PicoDebugger Makes Development Easier

Debugging a Raspberry Pi Pico is straightforward enough; it simply involves hooking up something up to the USB and SWD pins. [Mark Stevens] whipped up the PicoDebugger to make this job easier than ever before. The Raspberry Pi Foundation developed the Picoprobe system to allow a RP2040 to act as a USB to SWD and UART bridge for debugging another

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Building a Digital Compass With An Arduino

The magnetic compass has been a crucial navigational tool for around a thousand years or so, perhaps longer. While classical versions still work perfectly well, you can now get digital magnetometers that work in much the same way. [mircemk] decided to whip up a digital compass to demonstrate the value of these parts. The build uses a HMC5883L magnetometer. While

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Watch Those 1% Resistors

Decades ago, electronic components were not as easy to acquire as they are today. Sure, you could get some things at Radio Shack. But you might not have many choices, and the price would be on the high side. TV repair components were another option, but, again, big bucks. Some places sold surplus parts, which could be cheap. These often

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It’s Easy To Make Gears Out Of Wood

Typically, most of the gears we use in our life are made of plastic or metal. However, wood gears can do just fine in some simple roles, and they’re utterly pleasant to make, as this video from [botto bie] demonstrates. With steady hands, it’s easy to make basic gears by hand with basic tools and a printer. You just need

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A BASIC Interpreter For The Raspberry Pi Pico

It’s pretty easy to program the Raspberry Pi Pico in Python, or you can use C or C++ if you so desire. However, if you fancy the easy language of yesteryear, you might like PiccoloBASIC from [Gary Sims]. Putting it simply, piccoloBASIC is a BASIC interpreter that runs on the Raspberry Pi Pico. It features all the good bits of

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Portable Soldering Station Runs On Drill Batteries

Power tool batteries are a convenient portable power supply for all manner of different things. [Zachary Goode] noticed that Ryobi was using them to power soldering irons, but no such tool existed in the DeWalt range. Thus, he set about to build such a rig himself. The build relies on a simple 3D-printed adapter to suck power from a DeWalt

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Arduino-Powered Missile System Uses Ultrasound To Aim

In the real world, missile systems use advanced radars, infrared sensors, and other hardware to track and prosecute their targets. [Raspduino Uno] on YouTube has instead used ultrasound for targeting for an altogether simpler desktop fire control solution. This fun build uses a common off-the-shelf USB “missile launcher” that fires foam darts. To supply targeting data for the launcher, an

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