How to measure inductance?

Meenal Arora's picture

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Joined: Sep 06, 2018

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How to measure inductance?
September 6, 2018 - 6:42pm

Hi guys,

i am trying to making a FM transmitter. So, for that i need to make a inductor with winding specification of  7 to 9 turns of 16 – 20 gauge wire around a ¼ inch former.

But how to check the inductance of that inductor, as my multimeter is not having inductance measuring option.

Please suggest me a circuit for inductance measurement and if anyone have made FM transmitter circuit suggest me for this one also...

Thanks 

 

Jayant's picture

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Joined: May 19, 2015

Replies: 204
Use the formula to calculate the inductance value
September 7, 2018 - 11:03am

Hi meenal,

Normally the value of inductors can be measured using LCR meters. There are some multimeters which could do that task but they are mosly not accurate.

In your case the simplest thing that you can do it use a formulae to calculate the inductance value of your inductor. The formulae is shown below

Capture.PNG

This formulae is applicable only for air-cored single layer inductor. Do keep in mind that the obtained value will only be close to practical value 

 

AISHA's picture

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Joined: Sep 07, 2017

Replies: 244
Circuit to measure inductance of a coil
September 7, 2018 - 11:13am

Jayant has already suggested the simplest way. However if you are onto measuring inductance values for your future projects also then it is better to build a LC meter by yourself. A crude one can be easily built using Arduino and Op-Amp the circuit diagram for the same is given below

Circuit-Diagram-for-LC-Meter-Using-Arduino.png

The code and other details for this meter can be found here: https://circuitdigest.com/microcontroller-projects/arduino-lc-meter-meas...

Again these readings are only to give you an rough estimate and are not highly reliable.