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How does technology work?  Digital electronics is built up almost entirely of "logic switches" that are assembled like Legos.  These switches use electricity to flip on and off, instead of using a finger as a light switch on the wall does.  They are a little trickier than light switches, but not much.  While you may not know how to assemble millions of these switches into a computer or video game, you can easily figure out the patterns in these building blocks.


This web page lets you play with several different kinds of logic switches.  Once you find the patterns in how they work, you will be able to design things like burglar alarms or a simple form of anti-lock brakes.



Step 1:  Click on the switches below to figure out the pattern between the switches and the lights.  Write the pattern down on the handout your teacher gave you.














Click here to go to Step 2



 2010 KnowledgeContext


Teaching Young People to Think About Technology