Collaborate Disseminate
We all have that one project on our minds that we’d love to build if we could just find the right combination of time, energy, and knowledge to dive right …read more Continue reading Woodworking, Blinkenlites, and FFT’s Dance To The Music
Fast Fourier Transforms. Spectrum Analyzers. Waterfall displays. Not long ago, such terms were reserved for high end test gear. But oh, how things have changed! It’s no surprise to many …read more Continue reading Art Project Fast And Fouriously Transforms Audio Into Eye Candy
Oftentimes in computing, we start doing a thing, and we’re glad we’re doing it. But then we realise, it would be much nicer if we could do it much faster. …read more Continue reading Even Faster Fourier Transforms On the Raspbery Pi Zero
You would think the hard part about creating a spectrum analyzer using a pint-sized ATTiny85 would be the software. But for [tuenhidiy], we suspect the hard part was fabricating an …read more Continue reading Spectrum Display Uses Tiny CPU and Many LEDs
One of the hard things about electronics is that you can’t really see the working parts without some sort of tool. If you work on car engines, fashion swords, or sculpt clay, you can see with your unaided eye what’s going on. Electronic components are just abstract pieces and the …read more
When we think of 3D printed parts for our projects, most of us imagine little bits like brackets and mounting plates. Perhaps the occasional printed project enclosure. But if you’ve got a big custom printer as [Joshendy] does, plus plenty of time, it opens up a whole new world of …read more
Continue reading Illuminated 3D Printed Guitar is Ready to Rock
You probably have at least a nodding familiarity with the Fourier transform, a mathematical process for transforming a time-domain signal into a frequency domain signal. In particular, for computers, we don’t really have a nice equation so we use the discrete version of the transform which takes a series of …read more
Continue reading DSP Spreadsheet: The Goertzel Algorithm is Fourier’s Simpler Cousin
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
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
When you’re operating a machine that’s powerful enough to tear a solid metal block to shards, it pays to be attentive to details. The angular momentum of the spindle of a modern CNC machine can be trouble if it gets unleashed the wrong way, which is why generations of machinists …read more