GPS Navigation - Part 3
May 2010, Page 61
Our Navigation code will get a bit more complex, so this month the focus will be on how the individual sections work.

GPS Navigation — Part 2
Project:
April 2010, Page 38
Build a small robot to test and prove the theories discussed in Part 1.

GPS Navigation - Part 1
Project:
March 2010, Page 54
Give your bot some good direction so it can travel great distances with very little extra hardware.

Base on a Budget
Project:
February 2010, Page 67
Get a useable robot platform up and running with only a minimal budget.

Getting Control With the Propeller | Part 1
September 2008, Page 42
Recently, an artist friend asked me how he might go about automating his latest masterpiece using a BASIC Stamp®. After looking at what he had, it turns out he was going to need to control DC motors, hobby servos, and stepper motors. While there are solutions for controlling all of these devices it would generally mean having three separate controllers (one for each device). A better solution would be ...

Getting Control With the Propeller | Part 4 | Propeller Multi-Controller
December 2008, Page 34
This month, we wrap up our four part series by covering practical use of PWM on the Propeller using our multi-controller board. In last month’s article, Kevin McCullough covered stepper motor control and made schematics available on the project web page. These schematics use the L293D Quad Half-H Driver IC which provides bi-directional drive currents of up to 600 mA from 4.5V to 36V. We will use the L293D in this article for both motor control and light dimming...