While some decent lasers are out there for under $400 USD, they tend to be a little small. What if you wanted something a little nicer but didn’t want to jump to the $2,000 category? The answer for [Owen Schafer] was to build it with parts he had lying around and a few strategic purchases. While […]
A HOME MADE LASER CUTTER FOR $700 Continue Reading
Drums are an exciting instrument to learn to play, but often prohibitive if there are housemates or close neighbors involved. For that problem there are still electronic drums which can be played much more quietly, but then the problem becomes one of price. To solve at least part of that one, [Jeremy] turned to using an
ARDUINO DRUM PLATFORM IS FAST Continue Reading
We’ve all heard of the smoke test, and we know that it’s the lowest possible bar for performance of an electronic device. If it doesn’t burst into flames when power is applied, you’re good to go for more functional testing. But the smoke test means something else for cars, especially those powered by diesel fuel.
HOMEBREW OPTICAL SENSOR HELPS YOUR DIESEL PASS THE SMOKE TEST Continue Reading
Before smartphones exploded on the scene in the late 00s, there was still a reasonable demand for pocket-sized computers that could do relatively simple computing tasks. Palm Pilots and other PDAs (Personal Digital Assistants) were all the rage in the ’90s and early ’00s, although for cutting-edge tech from that era plenty of these devices
POCKET COMPUTER REMINDS US OF PDAS Continue Reading
We see a lot of simple pen plotter projects around here, and while we appreciate them one and all, most of them are a little on the slow side. That’s OK — a glacial pace is sometimes all that’s needed, as long as it gets the job done. But there’s nothing wrong with putting the
THIS ARDUINO PEN PLOTTER IS BUILT FOR SPEED Continue Reading
As the internet of things evolves, understanding it is key to both better security and more efficient use. The 2022 Complete Raspberry Pi & Arduino Developer Bundle features nine courses to hone your open-source controllers and device skills. All nine courses are taught by Edouard Renard. In addition to Renard’s extensive work experience with open-source software as a software
Develop your IoT and robotics skills with this training bundle deal Continue Reading
Two-factor authentication is becoming the norm for many applications and services, and security concerns around phone porting hacks are leading to a phaseout of SMS-based systems. Amidst that backdrop, [Josh] developed his own authentication device by the name of Good USB. The device can be built using a Arduino Leonardo, SS Micro, or even a BadUSB
BUILD YOUR OWN TWO-FACTOR AUTHENTICATOR WITH GOOD USB Continue Reading
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Learn Arduino with this comprehensive kit Continue Reading
The Commodore 64 is a much-loved 8-bit retro computer that first appeared in 1982 and finally faded away around a decade later. The Commodore company started by [Jack Tramiel] went on to make the Amiga, and eventually ceased trading some time in the late 1990s. All history, now kept alive only by enthusiasts, right? Well,
WILL THE REAL COMMODORE PLEASE STAND UP? Continue Reading
There are a variety of instruments used in sleep studies to measure bodily activity during sleep and consequent sleep quality. Many of them use techniques that perhaps aren’t so easy to replicate on the bench, but an EEG or electroencephalograph to measure brain waves can be achieved using a readily-available module. [Ben Jabituya] shows us a
A SLEEP MONITOR FOR MINIMUM OUTLAY Continue Reading
