Friday, January 29, 2010
Chapter 3 - Exercise 13
For this experiment, I used a green LED and a yellow LED. The green one got the 15W treatment followed by 30W. The yellow got 30W but I added in the small copper alligator clip.
As the chapter states, the 15W was a piece of cake - the green LED was still lit well after 2 minutes of holding the iron to it. I even moved the iron's tip very close to the plastic of the LED but it had no negative effect.
Then I switched over the pencil iron to 30W... and held the tip to the wire. After 40 seconds I was a little worried that maybe I'd selected the Super-LED... or that my pencil iron was defective. But near 1m 30sec, the green LED gave its last performance.
So, I threw away the green LED and replaced it with the yellow... plus I added the little copper clip as seen in one of the photos. I held the 30W iron to it for over 2 minutes, but it just kept on shining.
It's always fun to smoke electronic components - we were promised that in the book's sales sheet, right? The green LED sacrificed itself and I will never forget the lesson it taught me - too much heat can be a bad thing. Use the copper clips whenever possible.
RIP Green LED. You will not be forgotten.