Inductance Measure

185

04:11:07

To calculate the inductance of an real life inductor, build the circuit using a capacitor, resistor and any square wave generator  ( might be a microcontroller or 555) with 100+ Hz ,measure the pulses' frequency or period and use the following formula. L = 1/( f^2 * 4 * π ^2 * C ). This is useful if you have a osciloscope because you may see the input response of the tank LC circuit and measure its period/freqiency.

Note: the EveryCircuit frequency measuring has better precision for lower time stamps (  < ms/s )

published 9 years ago

Hamza_Najah

9 years ago

I like it thanks its very helpful <3

jpoulin0901

9 years ago

*L=1/(4*π^2*f^2*C) (You forgot to square pi) If you have a scope, you're actually better off just building a negative resistance oscillator like this http://everycircuit.com/circuit/5224939085103104 or even just a Colpitts if you prefer, then simply measure the frequency of voltage oscillation across your coil. I used to use the coil from a 24V Relay or shaded pole motor as a magnetic pickup so that I could measure the current in the tank without disturbing the circuit at all. I got very good results using this method with only my computer as a scope.

Markkus92

9 years ago

Yeah, thanks for pointing it out. Pi square. Colpitts sounds good but you need more components. If you have them, surely is the better option.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.