Differences

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--- other:electronics:inductance-meter [2024/05/20 15:20] – oscar
+++ other:electronics:inductance-meter [2024/05/20 15:30] (current) – oscar
@@ Line 4: / Line 4: @@
   * Function Generator.
   * Oscilloscope
-  * the coil to be tested
+  * Coil to be tested
+  * Resistor (value depends on the coil value and frequency range)
 ===== Setup =====
+Connect the coil with a series resistor to the function generator. Adjust the frequency until the peak-to-peak voltage over the coil is the same as the peak-to-peak voltage over the resistor. In that case "V-scope" is 50% of "V-Gen".
 {{:other:electronics:spice-inductor.jpg?640|}}
 ===== Formulas =====
+The exact ratio between the generator voltage and the voltage measured by the scope over the inductor can be calculated with the following network theory:
 {{:other:electronics:formule1.gif?640|}}
+In this formula L represent the inductance, R the resistance, and omega the radial frequency ( = 2*pi*f with f in Hz). The question now is for what frequency (Vscope/Vgen) = 0.5:
 {{:other:electronics:formule2.gif?640|}}
 ===== Links =====
 [[https://www.dos4ever.com/inductor/inductor.html]]