Upgrading a Laser Cutter from China…

April 15, 2011
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I recently wrote about some of the problems I’d had with the Chinese Laser Cutter I bought over eBay. It became apparent that I was going to have to replace the X/Y controller board, as this was not functioning correctly. The Challenge – adding a new controller I just pulled my old CNC out of […]

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Microsoft to release Kinect SDK tomorrow?

April 13, 2011

Just got an email from my buddy Bob – he’s currently attending MIX11 in Vegas… The just handed out Kinect sensors and the new SDK to all attendees. The demo was neat. Looks like body tracking is part of the SDK. This is pretty awesome news. As some of you may remember I got myself […]

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Buying a Laser Cutter from China (Part Three)

April 13, 2011
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And things were going so well… When I first connected the software to the cutter I could get no response at all. I examined the supplied parallel cable and found that some of the pins had been pushed in. Nothing that couldn’t be fixed with some needle-nose pliers. So I fixed the cable and plugged […]

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Buying a Laser Cutter from China (Part Two)…

April 12, 2011

2012 UPDATE: Check out the new laser cutter I built from scratch here -> New 24×18″ CO2 Laser Yesterday I wrote about the Laser Cutter / Engraver I received (40W Craftworks CO2 Laser Engraver&Cutter by strong_signstech). In this post I’m going to hook up the laser and do some initial system tests. Having read the […]

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Buying a Laser Cutter from China (Part One)…

April 11, 2011
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2012 UPDATE: Check out the new laser cutter I built from scratch here -> New 24×18″ CO2 Laser Since building the CNC router last year I’ve become increasingly interested in adding a laser cutting/engraving head. Scanning eBay I found lots of component parts, but I did not have the expertise to create a working system. […]

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Strange Wiimote camera…

March 29, 2011

Patrick van der Poel wrote to me with some pictures of what he found when he opened up a Wiimote recently. Instead of the normal Pixart sensor he found a strange daughter-board configuration. It looks very easy to remove, but it’s nothing like the regular sensor. Fortunately they labelled the board pinouts on the underside […]

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Creating a negative voltage from a positive one

March 28, 2011
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If you use opamps like the TL082/84 you’ll be in need of a “split” power supply. That is a power supply that has a positive voltage, ground, and the equivalent negative voltage (eg +5v, 0v, -5v). Since most audio signals are AC you need the opamp to operate in this range to be able to […]

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How to get 100% on your Senior Project…

March 26, 2011
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Build yourself a laser harp. At least that’s what Connor Thomas did – he’s been working on it for some time and he just sent me an email to let me know that the results came in and he scored 100%. Nice one. Here he is next to the tri-fold display.

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Inexpensive XY laser display using speakers

March 20, 2011
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[This project was featured on instructables.] Building an XY laser display “scanner” using a couple of 80W speakers. I looked into doing something like this way back when I was developing the laser harp – but I came to the conclusion that it would not be accurate enough – turns out as I wrong. This […]

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…getting one million views on YouTube

March 19, 2011
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Yay! After 3 years of ‘tubing I finally watched the view counter on my Youtube channel account click past 1,000,000 views. Here’s the 5 most popular videos by subject… 1. The Laser Harp – got the lion’s share at 389,367 views 2. How the TARDIS really works – 23,317 views 3. Building a robotic Dalek […]

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