Stephen Hobley

AudioLab – a very slick audio processing library for .Net

March 15, 2011
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I recently needed to do some analysis on an audio signal through the microphone socket. I tried using an “off-the-shelf” audio package and the results were OK, but it took quite a lot of effort to isolate the correct frequency bands to get the information I needed. So much so, that I started to look […]

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…the last darned MIDI interface I’ll ever build.

March 14, 2011
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I have a love/hate relationship with MIDI. More than half the projects I work on require some kind of MIDI interface, and I can *never* remember the hookup. All the diagrams on the web never indicate if the view is from the front, or the back of the connector. *And* I can never find a […]

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1 second of time, stretched to 24 seconds

March 13, 2011
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I don’t usually give in to impulse-buy urges, but I picked up a camcorder (JVC GZ-HM550) at Fry’s the other day and was surprised to see it had 120, 300 and 600 fps shooting modes. I didn’t know consumer camcorders could do that… So I put it down again, and went home thinking I’d research […]

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…still messing with forces I don’t understand – the formula.

March 2, 2011
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NEWSFLASH : Just when I thought this story was done with – I just tried adding a sprinkle of salt to the (already) potent mix of Hydrogen Peroxide and Muriatic Acid – Dang! It etched the whole board in under a minute… Wow! Definitely some kind of catalyst. Resulting solution is bright green (CuCl2?), not […]

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…messing with forces I don’t understand.

March 1, 2011
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If you’re anything like me, you like to etch PCBs at home. Quite often you’ll get the urge, but find that you’ve just run out of Ferret Chloride*, or Bureaucratic Acid* So what can you do? I know little about chemistry, but that doesn’t stop me from trying to cook up a substitute etching solution […]

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MIDI Camera – gesture control for Ableton (and just about anything else!)

February 26, 2011
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Way back in 2008 I did quite a bit of work with the Pixart camera taken from a Wiimote. There are no official specifications or data sheet available, so everything has been gleaned by reverse-engineering the chip itself. Over the last couple of years I’ve had a lot of people ask me about the sensor […]

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Space Invaders!

February 25, 2011
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…coasters! I just got these fantabulous Space Invader coasters from my brother-in-law – they’re actually made right here in Indianapolis by Cameron Oehler – check out the guy’s site: www.1337motif.com They seem to be assembled from lots and lots of tiny veneer squares – you can see the alternating grain in this photo: Although it […]

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…quite possibly the best birthday present. Ever.

February 22, 2011
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I realise that I’m very late to the party on this one – but my wife just bought me Lego Mindstorms for my 41st birthday. I’m seriously impressed with this kit – it uses a graphical programming language (something old-schooler’s like me used to call ‘LOGO’) to create the instruction sets, these are then uploaded […]

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Laser bounce mirrors on the cheap…

February 20, 2011

I was looking around for a way to quickly put together some adjustable bounce mirrors and came up with the following. I already had some 1″ square front surface mirrors, so I went out and bought some brass hinges and magnets from a local supermarket. Using pliers I pinched the hinges so that they no […]

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…introducing the Arduino FlipShield

February 16, 2011
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Even if I do say it myself, I’m getting pretty good at making printed circuit boards at home. Even down to adding a silk screen layer on top. Nearly everything I do is single sided though – and this can present a problem when it comes to docking with an Arduino. Since the solder side […]

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