Lesson: Mechanical and Non-mechanical computer switches   This lesson will introduce the student to mechanical and non-mechanical computer switches (transistors). Note, that with a little determination (and a generator), it would be possible to build a computer entirely from mechanical switches, although the end result would be as big as a house!   To start on this lesson: 1. Go to http://www97.intel.com/scripts-tji/index.asp. 2. Click the "Login" button on the home page. Username is jucomputer, password is computer  3. Select the lesson 4. Make sure to click on both units!.