Collaborate Disseminate
Amateur radio license exams typically have a question about the bandwidths taken up by various modulation types. The concept behind the question is pretty obvious — as guardians of the …read more Continue reading How Much Bandwidth Does CW Really Occupy?
One of the great things about the Hackaday community is how quickly you find out what you don’t know. That’s not a bad thing, of course; after all, everyone is …read more Continue reading A Single-Resistor Radio Transmitter, Thanks to the Power of Noise
[Larry Wall], inventor of Perl, once famously said that programmers have three key virtues: sloth, hubris, and impatience. It’s safe to say that these personality quirks are also present in …read more Continue reading Impatience is a Virtue When Testing This Old Maritime Teleprinter
The abacus has been around since antiquity, and takes similar forms over the hundreds of cultures that have embraced it. It may be one of the first devices to be …read more Continue reading Abacus Synthesizer Really Adds Up
We have to admit, it was hard not to be insufferably smug this week when Facebook temporarily went dark around the globe. Sick of being stalked by crazy aunts and …read more Continue reading Hackaday Links: October 10, 2021
If you work in a secure facility, the chances are pretty good that any computer there is going to be stripped to the minimum complement of peripherals. After all, the fewer parts that a computer has, the fewer things that can be turned into air-gap breaching transducers, right? So no …read more
Continue reading Side-Channel Attack Turns Power Supply into Speakers
We’ve seen no shortage of projects that use the ESP8266 or ESP32 to add “smart” features to existing home appliances, often by pairing the microcontroller with a radio or IR transmitter. If your device has an existing remote, integrating it into a custom home automation system is often just a …read more
Terrestrial radio may be a dying medium, but there are still plenty of listeners out there. What would a commute to or from work be without a check of “Traffic on the Eights” to see if you need to alter your route, or an update of the scores from yesterday’s …read more
Continue reading A Dangerous Demonstration of the Power of Radio
Of all the people I was looking forward to meeting at Supercon, aside from my Hackaday colleagues with whom I had worked for five years without ever meeting, was a fellow from Germany named Matthias Balwierz. The name might not ring a bell, but he’ll certainly be familiar to Hackaday …read more
Continue reading Bitluni Brings All the ESP-32 Multimedia Hacks to Supercon
Time was once that the amateur radio bands were an aurally predictable place. Spinning the dial up and down the bands, one heard familiar sounds – the staccato of Morse, the [Donald Duck] of sideband voice transmissions, and the occasional flute-like warble of radioteletype signals. Now, the ham bands are …read more
Continue reading Name that Unknown RF Signal with a Little FFT Magic