I'm thinking about using time-domain reflectometry to find the fault(s) on a string of Christmas lights.
Relatively recently, I got interested in time-domain reflectometry, which is essentially just sending a pulse down a cable and measuring the amount of time for its reflection to return.
It's useful for testing long cables and finding where there's a break.
I bought a little device that plugs into my oscilloscope and provides a USB-powered low-frequency oscillator for doing this. (Total kit cost is <$400.)
It also provided a good "object lesson" by showing me that the signal traveled through some coaxial cable only at about 66% of c, reminding me about that last part of its definition as the speed of light *in a vacuum*.
That's only about 1.9 × 10^8 m/s.
According to a quote from "Computer Networks - A Systems Approach (5th Ed)", a signal through copper wire could propagate at 2.3 × 10^8 m/s and through optical fiber it's just 2.0 × 10^8 m/s.
Kabelbreuk vinden met TDR
https://makertube.net/videos/watch/1281957e-c9d4-4672-b624-658100f05013
Hoe lokaliseer je een breuk in een kabel met behulp van time domain reflectometry. Meer informatie vind je op: https://www.meezenest.nl/mees Mijn Engelstalige kanaal: @MeesElectronics Donaties: https://ko-fi.com/meeselectronics of maak direct een donatie over naar: NL91 ASNB 0708 7056 77 t.n.v. M.T. Konstapel (BIC: ASNBNL21) Free Broll by Videezy Music: https://www.bensound.com/royalty-free-music Sound effects: https://bigsoundbank.com
Repairing a broken cable using TDR
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John Carlsen 🇺🇸🇳🇱🇪🇺
Mees