Latest Posts – Page 4

In the fall of 2011, the University of Waterloo Computer Science Club organized their artificial intelligence (AI) challenge for the fourth time. The goal of the challenge is to write a computer program (a so called bot) that solves an simple to explain, yet hard to solve problem as good as possible. Below, I explain the challenge and discuss my bot, with which I finished 53rd out of 7897.
For the limit switches on a custom 3D printer I’m designing, I want to try out some contactless sensors. I have chosen to use hall effect sensors, which are sensitive to a magnetic field.There are three different types of these sensors available. First, there’s the omnipolar hall sensor, which turns on when a magnet comes in its vicinity. Next is the unipolar one, which turns on as long as a specific magnetic pole is close enough, which pole depends on the sensor. Finally, there’s the bipolar hall effect sensor, which latches on when one pole comes close and only turns off when it senses the other pole.