Collaborate Disseminate
There are many ways to build a radio receiver, but most have a few things in common, such as oscillators, tuned circuits, detectors, mixers, and amplifiers. Put those together in …read more Continue reading All-Band Receiver Lets You Listen to All the Radio at Once
[Dale Cook] has cats, and as he readily admits, cats are jerks. We’d use stronger language than that, but either way it became a significant impediment to making progress with …read more Continue reading RFID From First Principles and Saving a Cat
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