This is a great project. It’s simple, cheap, and looks like it works great.
I received an email this morning from a fellow who had downloaded my study guide. He wrote:
On page 5 you state, “In Figure 1, the letter I stands for current. Current flows from the positive (+) terminal of the voltage source through the circuit to the negative terminal of the voltage source.” Is this correct? I’ve read a couple of other places that it is from negative to positive.
I get this question all the time. I think that this video does a great job of explaining that while electrons do flow from negative to positive, we still use the convention that current flows from positive to negative.
Steve Robert, W1SFR, makes some great keys. His keys are unique in that they use torsion bars for tensioning instead of springs or magnets. After watching this video, I think I might want to pick up one for myself.