…a sinewave generator using PWM

February 9, 2011
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I was reading up on filter design when I came across an article on the Lab3 site…. The results were impressive, using just Pulse Width Modulation generate an accurate 8-bit sine wave. The key is a good low pass filter – most of the time I’ve been using as RC filter, but this uses a […]

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Very short video of the DRSSTC Tesla coil

February 9, 2011

I’ve had this coil running for a while, but never shot any footage of it. The movie ends a bit quickly, because I got too close with the camera, and it went a bit mental…

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Controlling an LCD with just 3 pins…

February 7, 2011
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How do you know when you’ve had a really good idea? It’s when you go online and realize that a bunch of other people have all done the same thing. I use often use LCD panels in my projects – they’re cool to look at, and can really help with tracking down bugs. Trouble is, […]

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Can *you* top the laser harp…?

February 1, 2011
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This pitch tracking interface was originally created to add MIDI capability to a Vacuum Tube Theremin. It was only after it was finished that I realised it could be used as the basis for a whole range of different electronic instruments. The idea is that this processor can be used to interface to a wide […]

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Official! Laser Harp #2 most badass musical instrument ever built…

January 29, 2011
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Bill Fredette – a fellow laser harp user – alerted me to this write-up on cracked.com… http://www.cracked.com/article_18980_the-5-most-badass-musical-instruments-ever-built.html “If you could kill Bond with your Nanoguitar pick, you’d use the Laser Harp you’d to wipe out the rest of MI6 in one hellish afternoon of fire, blood, and inappropriately mellow tunes.” Just getting in, in front […]

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Pitch and Volume Tracking MIDI interface for the Theremin

January 24, 2011
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Can you top a laser harp…? After I published some of my earlier videos I get asked on a regular basis if I can create a MIDI interface that would work with any Theremin. So after completing the vacuum tube Theremin, I thought it was about time I put something together. The hardware tracks threshold […]

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R.I.P. CASIO VZ-1 Synth

January 21, 2011
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I think I was 17 when I finally saved up the £300 I needed to buy my first synthesizer. I opted for the Casio VZ-1 – not a particularly powerful synth, but at the time it was a very good controller keyboard. Casio where well known for “novelty” keyboards, and so the VZ-1 was quite […]

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Watts really were bigger in the 70’s…

January 11, 2011
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From time to time I like to check out the local Goodwill store – mainly the electronics to see if there’s anything worth salvaging and re-purposing. I keep a look out for TVs, radios and speakers but once in a while you can snag a real bargain. I just bought this amp for $10 – […]

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Laser Harp most viewed project on ScienceForCitizens.net

January 2, 2011

I just got an email from John Ohab at www.scienceforcitizens.net – he tells me that the laser harp was the most viewed project in 2010. They published a full list here: Science For Citizens

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How *not* to make a vacuum tube Theremin…

December 28, 2010
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I think that the humble coil has to be my favourite electronic component – You take some wire, and wind it round and round and make a radio, a metal detector, a tesla coil, and a theremin. And they look darned cool too. For a long time I’d been thinking about trying to build something […]

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