I found the following four videos on the AlphaPhoenix channel explaining various aspects of the propagation of electricity, which goes some way to explaining how the high impedance headphone might work in my 10in1 2/10 project.
- Watch electricity hit a fork in the road at half a billion frames per second
- Why does WATER change the speed of electricity?
- How does electricity find the “Path of Least Resistance”?
- An intuitive approach for understanding electricity
While watching the videos I discovered that Brian’s oscilloscope is a Siglent SDS1104X-E (100 MHz) Oscilloscope, a pretty nice looking bit of kit!