aaron

Writing contracts is like programming

Writing contracts feels a little bit like programming. There is an expected syntax and structure, there are certain key words that have special meaning (i.e. functions, keywords), and removing certain clauses make the entire contract invalid (i.e. runtime error). However, contracts are executed over a much longer timeline.

aaron

An exciting month for Google

A recap of all the things Google has announced in this first week of December. The big ones are Google Goggles, new versions of Chrome, and real time searching, but they’ve also launched some less flashy things like a dictionary and public DNS service. Augmented reality becomes a ... reality Google Goggles Favorite Places and QR Codes Google Chrome for Mac and Linux Google Chrome Extensions Real...

aaron

8×8 RGB Buttons Project Description

Project Description We are creating an 8×8 matrix of RGB LED buttons. SparkFun sells a 4×4 button pad and circuit board for this. We’re going to connect four of those together to make an 8×8 grid. When you press a button, it will cycle through 8 colors: red, yellow, green, cyan, blue, purple, black and white. It would be cool if you could save these images that you make, and then...

aaron

Ultrasonic Sensors – continued

Haven’t posted on this project in a while, but there have been some developments. I determined that the reason I wasn’t seeing anything at all was because I had inadvertently grounded one of the output pins on the receiver. Whoops, I figured it would be something stupid like that. However, that did not immediately solve my problems. Luckily, I was working in an electronics lab, where there...

aaron

Installing majordomo mailing list manager

First, I downloaded the Majordomo source code from here. Following the instructions in the included INSTALL file, I was able to get Majordomo installed relatively quickly. I ran into problems when I started trying to actually send email to the new list. The first problem I ran into was that sendmail wasn’t started, but that was just silly. The first real problem was something they actually...