Low Cost Impedance Analyzer

Measuring the coil's inductance can provide important information about performance. A "switched reluctance" coilgun generates force proportional to the change of inductance as the projectile moves along. How can you easily and accurately measure the inductance?

This article from Nuts & Volts magazine is reproduced with the author's permission. The February 2008 issue describes a circuit with a handful of passive parts for a low-cost impedance analyzer, by George R. Steber.

Nuts & Volts, February 2008

Although I reproduce the scanned pages here, please contact the publisher for reprints or questions.