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SNA Junior
I have (finally) got round to building my own instance of DuWayne, KV4QB's prize-winning Scalar Network Analyser Jr:and a great little instrument it is too!DuWayne and I have been corresponding for a...
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Occam Going Dutch
Kees, pa5cw, has produced a new variant of my 'Occam's Dirk' software for a multi-band CW transceiver.'Occam's Dirk' was a multi-band development of the original 'Occam's Microcontroller' concept,...
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A WiFi-Controlled VFO
Now that I have placed a DDS on a board with Wireless connectivity, it is only obvious to set it up as an AP Web Server and allow remote control via a 'soft' user interface...When I first started to...
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Noisy ESP8266
Having enjoyed a lot of success transmitting and having produced a usable VFO, I decided it was time to try using the new m0xpd / Kanga ESP8266 - DDS board in a receiving application. I soon discovered...
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ESP8266 Kit Released
The m0xpd / Kanga ESP8266 - AS9834 board, 'A DDS on The Internet of Things,' is now available for purchase as a kit, with the three SMD devices supplied already installed on the PCB...The kit is...
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Homebrew WiFi Shield
Having just finished development of the new m0xpd / Kanga ESP8266 - AD9834 board, I find myself with a few WiFi components knocking about on the bench - so I figured it would be fun to try to make a...
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Forty-9er Shield
I've been tinkering with a quick lash-up of Wayne Burdick, n6kr's famous 'Forty-9er' receiver, implemented on an Arduino shield and tuned by one of my DDS systems.Regular readers will remember how I...
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Santa Stopped Here
Unwilling to go to the trouble of watching out, not crying, not pouting and - worst of all - being nice rather than naughty, the kids round here resorted to posting stop signs, exhorting Santa to call...
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HNY
Don't know about you, but Winter Sports was a complete wash-out for me - perhaps due to a complete lack of snowThe snow-free picture above is the only ski area I can claim any familiarity with -...
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Analog Synths
Cameron was talking about analog synthesizers last week and he got me interested.I refer, of course to my colleague Cameron and not to the former 'Prime' Minister. Don't expect any political comment or...
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Synthesized Sidetone
The m0xpd bench is full of even more tangles of wire, associated with analog synthesis.I realised this morning that my new system could be gated by any time sequence, such as that produced by my Morse...
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A Modular is Born
I should 'fess up'. I've been having a ball. I've been neglectful of the radio arts whilst working up my recent experiments with analog synthesizer elements into something more permanent.In fact, you...
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Signal Processing on the Arduino
I've been doing some DSP on the ArduinoSince signal processing is so computationally intensive, we tend to associate it with powerful processors, like the mighty ARM of the DUE. However, it is entirely...
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Volca Sync DIY
A few weeks back Cameron (yes - the Cameron who started all this synthesizer nonsense) came into the office with a neat little toy. It was the Volca Keys Analog Synthesizer, made by Korg. It was great...
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iPad WSPR
I'm about to take a few weeks rest up in Bonnie M-Land. Since I always take the trusty FT817 on (domestic) holidays and am never far from an iPad or iPhone, I thought it might be fun to see if there is...
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Gaelic WSPRs
I was fortunate to spend a week on the banks of Loch na Deasport on the Isle of Lewis and (as previously advertised) I decided to throw out some WSPR signals.The cottage in which I was staying had a...
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A Scalable Multiplexer for Eurorack
I've been playing with the electronic synthesis and manipulation of sound - mainly in the context of Eurorack Modular Synths - over the past few months.Whilst it is relatively easy to set up systems...
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New Builds and Kudos for a Blogger
At some point during the past five months of development work on my synthesiser, I was lucky to chance on Eddy Bergman's blog. Eddy has built an impressive website which details the development of his...
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Logic Gates and a Modulation Curiosity
Recently I added some logic gates to my synthesiser. Not the familiar little chips we know and loverather, logic gates especially for musical application.I’ve had an OR gate in my synth from the early...
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VCAs and Old Dutch Masters
There's a saying out there, which is almost a truism: "you can never have too many VCAs".Having some time on my hands today, I decided to knock up another of my takes on Yves Usson's 'simple VCA'...
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EAGLE Toroid Library is Available (again)
Yesterday, after a request from Giannis in SV-land, I uploaded my EAGLE Library for inductors and transformers wound on FT37 and FT50 Toroidal Ferrite Cores to a github repository.I had published this...
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SubHarmonics
A couple of posts ago I wrote "I'll have something to say about adding and 'mixing' harmonics; watch this space." Well, the time has come - enter my new module, SubHarmonicsBefore I go any further, I...
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Bombing Run
I was sitting here at my computer yesterday, quietly building envelopes from a bunch of straight-line segments (no, I can't tell you why). Suddenly, the quiet was broken by a familiar and evocative...
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encore!
Some weeks ago I noticed a flurry of discussion of the PT2399 device on various Facebook groups of which I'm a member. The PT2399 is marketed as an 'Echo Processor', offering the ability to generate a...
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Sample and Hold
I have had a Sample and Hold for a long time...It is, as you see above, a homemade module, built around five years ago to the design published by the late, great Ray Wilson of 'Music from Outer...
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