Collaborate Disseminate
Dipole antennas are easy, right? Just follow the formula, cut two pieces of wire, attach your feedline, and you’re on the air. But then again, maybe not. You’re always advised …read more Continue reading The Dipole Antenna Isn’t as Simple as it Appears
A stroboscope is not the most common tool, and while they can be purchased fairly inexpensively from various online stores, they are straightforward enough tools that plenty of us could …read more Continue reading Spin Up To Speed With This Stroboscope
[mircemk] is quite a wizard when it comes to using coils of wires in projects, especially when their application is within easy-to-build metal detectors. There are all kinds of ways …read more Continue reading Metal Detector Gets Help From Smartphone
Even with fancy smartphone apps and custom-built tuners, tuning a guitar can be a tedious process, especially for the beginner. Pluck a string, figure out if the note is sharp …read more Continue reading Handheld Bot Takes the Tedium Out of Guitar Tuning
Transformers have an obvious use for increasing or decreasing the voltage in AC systems, but they have many other esoteric uses as well. Electric motors and generators are functionally similar …read more Continue reading Keep Coffee Warm Through Induction Heating
GPS technology is a marvel of the modern world. Not only can we reliably locate positions on the planet with remarkable accuracy and relatively inexpensive hardware, but plenty of non-location-based features of the technology are available for other uses as …read more
I suppose most of us have had the experience of going to the mailbox and seeing that telltale package in the white plastic bag, the sign that something has just arrived from China. This happened to me the other day, and like many of you it was one of those …read more
Continue reading Product Review: The tinySA, a Shirt-Pocket Sized Spectrum Analyzer
Building computers from discrete components is a fairly common hobby project, but it used to be the only way to build a computer until integrated circuits came on the scene. If you’re living in the modern times, however, you can get a computer like this running easily enough, but if …read more
Why would anyone put as much effort into resurrecting a 1970s split-flap clock as [mitxela] did when he built this custom PLL frequency converter? We’re not sure, but we do like the results.
The clock is a recreation of the prop from the classic 1993 film, Groundhog Day, rigged …read more
Continue reading Split Flap Clock Keeps Time Thanks to Custom Frequency Converter
Large-scale existential threats exist everywhere and can annihilate us with only trivial effort. Should we all throw everything we can at them? Continue reading How to Model Risk in an Apex Predator Cyber-World