Building Arduino with PWM. Pulse Width Modulation is a technique for getting analog results with digital means. 
Parts List<ol> 
<li>Arduino Uno ($3.61)</li> 
<li>Breadboard and Jumper Wires ($7.48)</li> 
<li>PixelStick ($3.25)</li> 
<li>RTFPixel Circle ($10)</li></ol> 
Hosts: <a href="https://twitter.com/padresj" target="_blank">Fr. Robert Ballecer, SJ</a> and <a href="https://twit.tv/people/louis-maresca">Louis Maresca</a> 
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Join Father Robert Ballecer and Lou Maresca on Coding 101, a weekly instructional, project-oriented programming show with appeal for beginning to intermediate programmers. Using a combination of classroom-style teaching, guest programmers, and special interest segments, Coding 101 offers beginner, intermediate, and "applied" programming topics within several interchangeable modules. Learn programming languages such as Java, C++, Visual Basic, PHP, Perl, and more!

Although the show is no longer in production, you can enjoy episodes from the TWiT Archives.