cj_elec_tech
- Oct 7, 2009
- 61
- Joined
- Oct 7, 2009
- Messages
- 61
Wow! Good effort Gerbil!
Can't wait to see the pics!
Can't wait to see the pics!
An LED has only two leads - pay attention to the + terminal because reverse voltage is usually low.Question from a beginner-
Preface I am a "sub novice" and have no electronics experience or training.
I am building a halloween costume for my son as a Robot and have set up some basic LEDs. I found a beginner's tutorial on instructables.com which was very helpful in explaining things from the ground up.
While at radio shack I found the blinking LEDs, which of course I thought would look cool. From what I have read online so far, I sense that setting up the flashing LEDs is beyond my knowledge base (or time frame!) right now, so I am going to only use regular LEDs for the costume. However, I find this stuff very interesting so maybe you can shed some light for me.
My questions:
-The led has three leads instead of two. What is the third for?
- I hooked one up with the appropriate calculated resistor. It blinked for about a minute or less and then stopped. What is the reason it stops?
-My web research talks about using a timer circuit ("555"), which I wiki'd but obviously alot of the technical description is beyond me. Is a timer part of using these flashing LEDs?
Thanks alot to anyone willing to explain these fundamentals.