Collaborate Disseminate
The Casio F-91W digital watch is perhaps one of the most successful pieces of consumer electronics ever made, having quietly supplied the essential function of an inexpensive and accurate LCD …read more Continue reading The Casio F-91W As A Contactless Payment Device.
The basic principle of radar systems is simple enough: send a radio signal out, and measure the time it takes for a reflection to return. Given the abundant sources of …read more Continue reading Using a Scientific Satellite for Passive Radar
If you own a handheld transceiver of any type then the chances are it will come with a “rubber duck” style antenna. These flexible rubber-coated antennas are a compromise in …read more Continue reading All Handheld Antennas Are Not Born The Same
Looking up at the sky just after sunset or just before sunrise will reveal a fairly staggering amount of satellites orbiting overhead, from tiny cubesats to the International Space Station. …read more Continue reading Building a Low-Cost Satellite Tracker
The magnetic loop antenna is a familiar sight in radio amateur circles as a means to pack a high performance HF antenna into a small space. It takes the form …read more Continue reading Cheap VHF Antenna? Can Do!
Using digital techniques has caused a resurgence of interest in VLF — very low frequency — radio. Thanks to software-defined radio, you no longer need huge coils. However, you still …read more Continue reading Optimizing VLF Antennas
For as mysterious, fascinating, and beautiful as lightning is at a distance, it’s not exactly a peaceful phenomenon up close. Not many things are built to withstand millions of volts …read more Continue reading Neon Lamp Detects Lightning Strikes
The ARRL used to have a requirement that any antenna advertised in their publications had to have real-world measurements accompanying it, to back up any claims of extravagant performance. I’m …read more Continue reading Field Testing An Antenna, Using A Field
Metalized Mylar “space blankets” are sold as a survivalist’s accessory, primarily due to their propensity for reflecting heat. They’re pretty cheap, and [HamJazz] has performed some experiments on their RF …read more Continue reading Mylar Space Blankets As RF Reflectors
We’ve seen tons of projects lately using the ESP32-C3, and for good reason. The microcontroller has a lot to offer, and the current crop of tiny dev boards sporting it …read more Continue reading Simple Antenna Makes for Better ESP32-C3 WiFi