Hello, I am the IEEE Project Coordinator at my university and I am trying to teach beginners to electronics the concept of bread-boarding and how to use the 555 timer. Now I consider myself a pretty knowledgable person in electronics and this is why I'm kind of annoyed. I was going to show them t…

555 timer beginner circuit help

nickgammon March 5, 2013, 3:54am 5

I made up that exact circuit, and it worked. Both LEDs flashed. Only one flashed when powered with 5V.

it just isn't running

What do you mean? No LEDs flash? Just one? One or both on all the time?

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