Hannah is doing a science project for school. Her question is “how long does it take for electricity to travel through a wire? well.. having a dad that has access to test equipment, and wire, helps! She has done just about everything, I have only explained to her how to measure with the oscilloscope, and how to connect the signal generator to the scope and wire to be measured. she has had to do everything else.. It was harder than I thought to explain the concept of “y axis on the scope is voltage, x axis is time”
how do you explain that the still image on the screen is actually a square wave that passes by over and over.. “but its not moving”..
And, the final measurement! the orange trace is the signal going into the wire (the lading edge of a square wave), and the cyan trace is the signal coming out of the other end of 1000feet of wire, 1.23 microseconds later.. neat huh?
The next thing she did was measure an unknown length of wire, and estimate how long is it, by how long it took the signal to pass through it. I am looking forward to seeing how the report actually turns out.
#1 Posted by Anonymous 
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