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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,...
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Shoot the Moon with this Homebrew Hardline RF Divider
You can say one thing for [Derek]’s amateur radio ambitions — he certainly jumps in with both feet. While most hams never even attempt to “shoot the Moon”, he’s building out an Earth-Moon-Earth, or...
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Handheld 3D Scanning, Using Raspberry Pi 4 and Intel RealSense Camera
Raspberry Pi 4 (with USB 3.0) and Intel RealSense D415 depth sensing camera. When the Raspberry Pi 4 came out, [Frank Zhao] saw the potential to make a realtime 3D scanner that was completely handheld...
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Empanada Becomes Impractical, Delicious Synth
Vegemite is an Australian staple – a rich, protein-filled sandwich spread with a strong salty flavor. It serves as a great way to add a little umami to any dish, which is the hottest open secret in...
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A Digital Pitch Pipe Gets You In Tune
Some humans are blessed with perfect pitch, an ability that comes in handy when pursuing the musical arts. For many others though, a little help is often appreciated. A pitch pipe is a handy way to...
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Making PCBs With A Vinyl Cutter
You might assume that you need a lot of expensive stuff to make your own PCBs, but that isn’t the case: you can do it with a vinyl cutter and a few common chemicals and tools. [Emiliano Valencia] has...
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Teaching Robots Workplace Etiquette
Most often, humans and robots do not have to work directly together, instead working on different parts in a production pipeline or with the robot performing tasks instead of a human. In such cases any...
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Using the Steam Controller with LEGO Motors
While Valve’s Steam Controller was ultimately a commercial failure, there’s no denying it’s an interesting piece of hardware. With dual trackpads, a wealth of buttons, and Bluetooth capability, it...
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Particle Sniffer For Pollution Point Sources
When measuring air quality, particulate matter is an important metric to watch. The PM2.5 rating refers to particulate matter that has a diameter of less than 2.5 micrometers. While it’s often...
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DIY ESP32 Alarm System Leverages 433 MHz Sensors
There’s a huge market for 433 MHz alarm system hardware out there, from PIR motion detectors to door and window sensors. If you want to put them to work, all you need is a receiver, a network-enabled...
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The ATtiny Series Is A Great Companion In Isolation
As a consequence of the social distancing and self isolation, many a maker has been searching for ways to cure boredom. So what happens when you put a maker in a closed space with electronics parts....
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Teaching Science With An Empty Soda Bottle
Creating the next generation of scientists and engineers starts by getting kids interested in STEM at an early age, but that’s not always so easy to do. There’s no shortage of games and movies out...
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Infinite Flying Glider
If you’ve exhausted your list of electronics projects over the past several weeks of trying to stay at home, it might be time to take a break from all of that and do something off the wall....
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ESP8266 and Sensors Make for a Brainy NERF Ball
For his final project in UCLA’s Physics 4AL program, [Timothy Kanarsky] used a NodeMCU to smarten up a carefully dissected NERF football. With the addition to dual MPU6050 digital accelerometers and...
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LED Heart Beats With The Beholder
Many a maker likes to use their craft to create gifts for loved ones. [Jiří Praus] was celebrating having been married for 5 years, and crafted this beautiful LED heart sculpture to commemorate the...
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A Touchless Handwashing Timer Comes In Handy
In 2020, it’s no longer enough to simply wash your hands. You’ve got to do it right. Proper process involves rubbing soap and water over every surface of your hands, and taking a full 20 seconds to do...
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Making Aerogel, It’s Not For The Faint-Hearted
Aerogel — that mixture of air and silica — is one of those materials that seems like a miracle. It is almost not there since the material is 99% air. [NileRed] wanted to make his own and he documented...
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Oscilloscope and Microscope Augmented With Ghosts
Augmented reality saw a huge boom a few years ago, where an image of the real world has some virtual element layer displayed on top of it. To get this effect to work, however, you don’t need a suite...
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Is This The Oldest Still-Working Geostationary Satellite?
The LES-5 spacecraft Regular followers of space news will know that when satellites or space probes reach the end of their life, they either are de-orbited in a fiery re-entry, or they stay lifeless in...
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Typing By Slamming Your Laptop Closed. Repeatedly
Do you sometimes feel that your custom mechanical keyboard is not quite loud enough to proclaim your superior hacking powers? Or do you need a more forceful way shout in all caps at someone who is...
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