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Author Archives: Matthew
Unlocking my Lenovo laptop, part 2
The embedded controller In part 1, we looked at the communication between a Lenovo Thinkpad X230T laptop and battery, and discovered that there a challenge-response protocol used to authenticate ‘genuine’ Lenovo batteries. On the laptop side, this – and battery … Continue reading
Posted in Computing
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Unlocking my Lenovo laptop, part 1
Introduction Two months ago, I bought a new battery for my Lenovo laptop (a ThinkPad X230T). I was about to go away on holidays and wanted a battery that could last me through a plane flight; the original battery was … Continue reading
Posted in Computing
23 Comments
Introduction to photography slides
These are some slide decks I used to use when I ran introductory courses for the UNSW Photography Club. They are a pretty good set of slides so I figured they should have a home on the Web. Part I: … Continue reading
Posted in Other
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Global food security
I went to a great lecture today by Professor Chris Barrett on “The Global Food Security Challenge in the Coming Decades”. The slides from this lecture are available here. Here are my notes: Current global food demand growth is ~1.25% … Continue reading
Weather balloon physics
One of the simplest solutions for sending measurement instruments up into the stratosphere is a rubber balloon filled with hydrogen or helium. While the physics of such a balloon would seem to be simple, there are actually some interesting considerations.
Posted in Physics
12 Comments
New site
Welcome to the newly redesigned zmatt.net. I seem to only get around to upgrading my personal website once every decade so this is a special day indeed. The biggest change is that I now have a blog here (powered by … Continue reading
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