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AI Recognizes And Locks Out Murder Cats
Anyone with a cat knows that the little purring ball of fluff in your lap is one tiny step away from turning into a bloodthirsty serial killer. Give kitty half a chance and something small and...
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The Backbone Of VHF Amateur Radio May Be Under Threat
A story that has been on the burner for a few weeks concerns a proposal that will be advanced to the ITU World Radiocommunication Conference 2023. It originates with French spectrum regulators and is...
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Building a Googie-Style Sign With The Help Of CNC
The Googie style was a major architectural trend of the post-war period in the United States. It remains popular to throwback to this style, and [Wesley Treat] got the job to create a sign in this...
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This Arduino Is Feeding The Fishes
Fish are easy to keep as pets, requiring little more than regular feeding to keep them happy in the short-to-medium term. If you’re going on holiday, it can be nice to know that your pets are being...
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RC Trike Handles Great With Rear Steering
Small robotics builds with three wheels are plentiful. The most typical configuration is to have the two front wheels drive and turn the vehicle in a skid-steer configuration. The third wheel is often...
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Emulating A 6502 In ROM
The Gigatron TTL microcomputer is an exercise in alternative history. What if, by some bizarre anomaly of invention and technology, the 1970s was not the age of the microprocessor? What if we could...
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PiTop, Makers Of Raspberry Pi Laptops, Release Something That’s Not A Laptop
The Raspberry Pi the closest thing to a modular laptop. That’s the idea behind the Pi-Top, a laptop with a Raspberry Pi as a brain. Need an upgrade? No problem, just get the latest Pi, they’re up to...
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This MDF Sound Bar Sounds Great
Everyone should build a speaker cabinet at least once in their life, if only so they can realize how much thought goes into building a simple box. [John] of ibuildit.ca wanted a sound bar for his home...
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A Briefcase Pentesting Rig For The Discerning Hacker
In the movies, the most-high tech stuff is always built into a briefcase. It doesn’t whether whether it’s some spy gear or the command and control system for a orbiting weapons platform; when an...
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LED Music Visualizer Bespeckles Your Bedroom
When it comes to wall-mounted ornamentation, get ready to throw out your throw-rugs and swap them for something that will pop so vividly, you’ll want to get your eyes checked. To get our eyes warmed...
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Spice With A Sound Card
In years gone by, trying out a new circuit probably would have meant heating up a soldering iron. Solderless breadboards have made that even easier and computer simulation is easier still, but there’s...
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The Power Of Directional Antennas
AM broadcasting had a big problem, but usually only at night. During the day the AM signals had limited range, but at night they could travel across the country. With simple wire antennas, any two...
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E-Book Reader Gets Page Turn Buttons, Is None The Wiser
Most e-book readers don’t have physical page turn buttons. Why? They just don’t. Virtual page turns are accomplished with a tap at a screen edge. Determined to reduce the awkwardness of one-handed...
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MIDI-Gurdy, MIDI-Gurdy, MIDI-Gurdy Man
The hurdy gurdy is the perfect musical instrument. It’s an instrument with a crank, and a mechanical wonderment of drone strings and weird chromatic keyboards. No other musical instrument combines the...
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Sprucing Up A Bell & Howell Model 34 Oscilloscope
We’ll admit it, in an era when you can get a four channel digital storage oscilloscope with protocol decoding for a few hundred bucks, it can be hard not to see the appeal of analog CRT scopes from...
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Understanding Elliptic Curve Cryptography And Embedded Security
We all know the usual jokes about the ‘S’ in ‘IoT’ standing for ‘Security’. It’s hardly a secret that security in embedded, networked devices (‘IoT devices’) is all too often a last-minute task that...
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Raspberry Pi Catches The Early Bird
If you live in an area with high bird activity, setting up a bird feeder and watching some hungry little fellows visit you can be a nice and relaxing pastime. Throw in a Raspberry Pi with some sensors...
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How Not To Get Paid for Open Source Work
[Avi Press] recently made a Medium post sharing his thoughts on a failed effort to allow for paid users of an open source project. [Avi] is the author of Toodles, a tool to help organize and manage...
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Building A Smart Speaker From Scratch
Smart speakers have proliferated since their initial launch earlier this decade. The devices combine voice recognition and assistant functionality with a foreboding sense that paying corporations for...
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How To Turn A Chainsaw Into A Chopsaw
If you’re doing a lot of metal working, a chop saw is a great tool to have. It’s an easy and quick way to do a lot of neat, clean accurate cuts. [Making Stuff] wanted to do just that, but didn’t have...
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