In this video I follow up on a viewer’s comment that was posted on my “Impedance Matching” video (link below).
https://youtu.be/5p0v7ZU0WcA
The comment asked to demonstrate how you would go about measuring the Output Impedance of a laptop’s headphone jack.
Using a standard Multimeter, a resistor and a bit of ohms law, I demonstrate how this is achievable.
If you are uncertain about what impedance is, then you may find it useful to watch my “Impedance Explained” video here:-
https://youtu.be/3QtpaICzSNc?si=bZ9cHlYXFm4EZEZI
I also make reference to Voltage Divider circuits, which were previously explained in my “What Are Voltage Dividers” video here:-
https://youtu.be/FkfUatec0XY
For 3.5mm TRS Audio Jack breakout adaptor used in this video:-
🔗https://amzn.to/3SUQyzQ
I also highly recommend the UNI-T UT61E Multimeter used in this video:-
🔗https://amzn.to/49y6xt5
Topic Covered in this video:-
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Measuring Output Impedance
Impedance Matching
Ohms Law
Output Impedance
Input Impedance
Maximising output power
Multimeter and Multimeter Bandwidth.
⏱️Timeline
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00:00:00 – Introduction
00:00:29 – PKAE Theme Intro
00:00:38 – Measuring Example Earphone Impedance
00:01:39 – Dummy Load Resistor
00:02:25 – Measure Audio Output RMS Voltage (UNLOADED)
00:04:06 – Measure Audio Output RMS Voltage (LOADED)
00:04:53 – Circuit Diagram & Calculation Method
00:08:09 – Impedance Matching Graph (Spreadsheet)
🎶Intro Music from #inaudio :- https://inaudio.org/
Track = OddVision-HYPER POP