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Arduino VFO
The m0xpd wallet has been dusted off - to the extent that I actually invested in a genuine Arduino (!!!)Â Nothing against the penny-pinching WotduinoTM - but I need to be able to show true...
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Using the Arduino VFO
I've been playing with the Arduino VFO system, after she made her brief appearance as a blushing debutante in the sumptuous elegance of the Norbreck Castle Hotel. Regular readers will remember the...
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Analog Nostalgia
Having sold my soul to the devil (as some would see it) by playing with a digital synthesized VFO (Blogs passim), I decided it would be fun to take a walk down memory lane and look at a traditional...
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More Analog and the RBN
In the midst of yesterday's fun-and-games with the VFO, I was trying to engage in the G-QRP valve day with my (replica) Paraset. It was an almost complete failure! Unfortunately, I had greater than S8...
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VFO Pull
Now here's a pretty problem. Actually, it has been a living nightmare, spoiling my "playtime" these past few weekends!Having been in raptures over the elegance and efficiency of the DDS synth module...
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VFO Pulls No More!
My troubles with the SA602/612-based VFO are over - now she is completely oblivious to large signals, keeping on oscillating at just the same rate as when tickled by weak signals or nothing at all!The...
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Octals and Octuples
Younger readers will be amused to hear that bits once were so precious that we did't group them profligately in fours. Rather, we arranged them sparingly in threes.The four-bit groups conveniently were...
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Arduino Controlled Colpitts Oscillator
A recent post closed in something of a "cliff-hanger" ..."This puts me in the interesting position of being able to "close the loop" and making an automatic controller to regulate the frequency to a...
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Phone !
After the frustrations of getting an analog oscillator under the closed-loop control of an Arduino, I had promised myself a rest. I decided a change would be just as good - so I took what is (for me) a...
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Vintage Playthings
Just back from a(nother) splendid jaunt in the heavenly surroundings of Pickering, Yorks.The idea for the trip was conceived back when our trusty (and slightly rusty) 850 estate started to drift beyond...
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Kanga / m0xpd DDS Shield
I'm pleased to be able to report that the m0xpd DDS shield has been made ready for sale and will soon be available from Kanga-UK... The schematic is very much similar to that previously reported on...
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Sudden Transmitter Shield
After the fun and games with my original Arduino Transmitter Shield and experiments with an ugly version of George, g3rjv's "Sudden" transmitter, I've now closed the loop and built the first prototype...
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Arduino DDS Shield Available Now!
Delighted to see that the Kanga / m0xpd Arduino DDS Shield is available for purchase NOW... Even more delighted to see that Kanga is offering it at (what seems to me to be) a very attractive price!I've...
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Suddenly, best-ever beacon dx
Last weekend I saw my new Arduino Sudden Tx Shield and the DDS Shield sitting on the bench and an idea struck me - I'd work up a beacon which combined some of the flexibility of my multi-mode beacon...
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Occam's Microcontroller
I just arrived home from work to find that our beloved SPRAT has landed on my doormat, in its 156th issue. Perhaps your copy has arrived too.I am delighted that it contains what the editor, George,...
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Following Noble Tyre Prints
Having quoted from the book in my recent article in SPRAT, I was pleased to spend last week in "Five Red Herrings" country.I was staying just outside Gatehouse of Fleet, at the West Lodge of the Cally...
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Occam's Dagger
You've heard about his Razor - well now William is tooled up with a new blade - meet "Occam's Dagger"...It is just as sharp as the original "Occam's Microcontroller" rig, but it packs a much bigger...
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Arduino Sudden Tx Shield Available Now!
I am delighted to see Kanga's announcement that the Arduino "Sudden" Transmitter Shield is to be launched at the Rishworth G-QRP Mini-Convention at the weekend...You met my prototype in this post,...
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Occam's Beacon
Over the past few days I've been running a beacon system on 30m...Partly to provide opportunity for a soak test of the first build of the Kanga / m0xpd Sudden Tx shield and partly as context to get the...
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Beacon Real Time Clock
Today I lashed up a Tiny RTC module to the "Occam's Beacon" system...The RTC uses the Maxim DS1307 chip and communicates with the Arduino over I2C, which it shares with the LCD display. There's a...
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