Category Archives: radio hacks

Breadboard Breaks the Speed Barrier

It is common wisdom that solderless breadboards are only good for low frequencies. But how fast can they really go? There’s been a contest going on to see who can make the fastest breadboard-mounted oscillator and [Joe Smith] has been trying to keep his leading position. He’s already managed 6 …read more

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Posted in breadboard, contest, oscillator, radio hacks | Leave a comment

Raspberry Pi Takes Control of Ham Radio

Today’s ham radio gear often has a facility for remote control, but they most often talk to a computer, not the operator. Hambone, on the other hand, acts like a ham radio robot, decoding TouchTone digits and taking action — for example, keying the radio and reading off the weather …read more

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Posted in fast fourrier transform, fft, ham radio, numpy, radio hacks, touchtone, yaesu | Leave a comment

Tackling Trunked Radio with Software

For those starting to wade into radio as a hobby, one of the first real technical challenges is understanding trunked radio systems. On the surface, it seems straightforward: A control channel allows users to share a section of bandwidth rather than take up one complete channel, allowing for greater usage …read more

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Posted in amateur radio, dongle, ham radio, radio, radio hacks, RTL-SDR, software, software-defined radio, trunked | Leave a comment

An Open Hardware Modem for the Modern Era

Readers of a certain age will no doubt remember the external modems that used to sit next to their computers, with the madly flashing LEDs and cacophony of familiar squeals announcing your impending connection to a realm of infinite possibilities. By comparison, connecting to the Internet these days is about …read more

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Posted in aes-128, afsk, analog, classic hacks, Microcontrollers, modem, packet radio, radio hacks | Leave a comment

Credit Card Chip Used To Make Crystal Radio

Perhaps the simplest radio one can build is the crystal radio. Using a diode as a detector, the design generally uses less than 10 components and no battery, getting its power to run from the radio signal itself. [Billy Cheung] decided to build a crystal radio using a rather unconventional …read more

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Posted in credit card, crystal radio, radio, radio hacks | Leave a comment

WiFi Goes Open

For most people, adding WiFi to a project means grabbing something like an ESP8266 or an ESP32. But if you are developing your own design on an FPGA, that means adding another package. If you are targeting Linux, the OpenWifi project has a good start at providing WiFi in Verilog. …read more

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Posted in fpga, linux hacks, openwifi, radio hacks, SoC, verilog, wifi, wireless hacks, xilinx | Leave a comment

This Frequency Generator Knows How To Get Down

What kind of clever things could you do with a signal that had a period of 2 hours? Or 20? Any ideas? No seriously, tell us. Because [Joseph Eoff] has come up with a way to produce incredibly low frequency signals that stretch out for hours, and we’d love to …read more

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Posted in demodulation, frequency generator, radio hacks, signal generator, sine wave, software hacks, square wave | Leave a comment

Radio Shack Shortwave Goes Digital

If you spent the 1970s obsessively browsing through the Radio Shack catalog, you probably remember the DX-160 shortwave receiver. You might have even had one. The radio looked suspiciously like the less expensive Eico of the same era, but it had that amazing-looking bandspread dial, instead of the Eico’s uncalibrated …read more

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Posted in digital display, dx-160, frequency counter, frequency display, IF, radio hacks, radio shack, shortwave, VFO | Leave a comment

TEMPEST Comes To GNU Radio

As we use our computers, to watch YouTube videos of trucks hitting bridges, to have a Zoom call with our mothers, or even for some of us to write Hackaday articles, we’re unknowingly sharing a lot of what we are doing with the world. The RF emissions from our monitors, …read more

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Posted in gnu radio, radio hacks, sdr, tempest | Leave a comment

Understanding A Bit About Noise Can Help You Go A Long Way

There are many ways in which one’s youth can be misspent, most of which people wish they’d done when they get older and look back on their own relatively boring formative years. I misspent my youth pulling TV sets out of dumpsters and fixing them or using their parts in …read more

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Posted in friis equation, Hackaday Columns, noise, noise factor, Noise figure, radio hacks | Leave a comment