Wednesday, January 13, 2010
Chapter 2 - Exercise 7 Part 2
Taking apart a relay - fun but a little frustrating. It took about 5 minutes or so to shave away enough plastic for me to remove all four sides. Wear gloves if you can and don't cut yourself... that plastic is tough and I found the best way to remove it was to cut into the sides like your cutting out a half moon scoop... don't try to cut it away in straight slices downward.
After you're done, you'll have a nice little peeled away relay to examine... and it's fairly easy to figure out how it works, too... just like the book describes, you can see the small piece of metal that will move from one post to another. In one of the photos here, you can see the small metal piece in its default location... no voltage applied.
In another photo, I've moved the small metal piece with my finger... a closer look at your relay will show you how the metal posts on the bottom (top?) of the relay connect to the inner workings. Very cool stuff.