Answer to Facebook Question

I was recently asked on facebook:

Professor, I have a question about photons. Photons are packets of energy that have no mass, correct? Also sunlight has been calculated to have mass and Einstein's theory of general relativity relates energy and mass. How is then possible that photons have energy ...

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Analog Circuits: Fading LED Hat - Part 1

Introduction

Over the last few years LEDs are becoming much more common at Burning Man. This is generally a good thing, as it means we are likely to (hopefully) see fewer glow sticks left lying around the desert. Unfortunately, most of the LEDs on the playa tend to be of ...

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Test of Math

I’m going to be adding some equations, so I decided to install MathJax. This is just to check that it is working.

$$x=\frac{-b\pm\sqrt{b^{2}-4ac}}{2a}$$

I should be able to express inline math such as \(x\le5\).

I should test code too

ptr ...
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Out of Academia

In mid-July I made the decision to leave the University. The 2011-2012 year was a very tough one. I started the year with tenure and began working as Clerk of the Academic Senate. Even though budget conditions continued to be bad on campus I thought that I could help to ...

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Paint by Pixels

It’s time for a couple of software announcements:

  1. A new version of the Total Control Lighting Arduino library is now available (version 1.2). It includes support for the forthcoming Total Control Lighting Developer Shield (see the README for details), a new color designer example, which lets you dial ...
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Dear Students

Dear Students,

I am writing to those of you who have signed up for my classes in Spring 2012 and those who remain on the waitlists for those classes because as you heave heard registration is closing on December 19th. You have also been told that registration may not reopen ...

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