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Re:Can You Get Root with Only a Cigarette Lighter? by echoangle on Monday October 07, 2024 @05:24PM (#41771228)
Since he’s using a Piezo lighter, shouldn’t it be just a single DC pulse like discharging a capacitor?
Re:Can You Get Root with Only a Cigarette Lighter? by missinglugnut on Monday October 07, 2024 @05:48PM (#41771408)
I was confused on the lighter type so I deleted that part of my response. I think you're correct but I can't say for sure.
Re:Can You Get Root with Only a Cigarette Lighter? by james_a_craig on Tuesday October 08, 2024 @05:07AM (#41775231)
Even your example of discharging a capacitor can end up with a pulse both directions, caused by the inductance of the wires.

In this specific situation, there's no common reference level, and so the induced pulse will go both directions. You can think of this as being about the edges of the pulse being the parts that actually cause radio to be transmitted, and there's both a positive-going edge and a negative-going edge on a pulse.