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Registered Member #235
Joined: Wed Feb 22 2006, 04:59PM
Location:
Posts: 80
The first one should be 2.7mH (27 * 10^2). I don't know what the fourth number is for. Seems reasonable depending on size Datasheet
The second one doesn't align with any standard codes except for 151 = 150uH.
For measuring the inductance if you have a function generator and 'scope you can use a known capacitor and measure the resonant frequency of the combination then back calculate the inductance.
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Adrenaline wrote ...
The first one should be 2.7mH (27 * 10^2). I don't know what the fourth number is for. Seems reasonable depending on size Datasheet
The second one doesn't align with any standard codes except for 151 = 150uH.
For measuring the inductance if you have a function generator and 'scope you can use a known capacitor and measure the resonant frequency of the combination then back calculate the inductance.
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Yes, I generally use a 100 Ohm resistor on the output of the signal generator for protection, with the inductor and 'known capacitor' in parallel, with the 'scope in parallel with the inductor and capacitor.
Just turn up the frequency on the sig. gen untill the 'scope reads the highest amplitude, then calculate using an online LC calculator.
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Ash Small wrote ...
Yes, I generally use a 100 Ohm resistor on the output of the signal generator for protection, with the inductor and 'known capacitor' in parallel, with the 'scope in parallel with the inductor and capacitor.
Just turn up the frequency on the sig. gen untill the 'scope reads the highest amplitude, then calculate using an online LC calculator.
Since I do not have a function generator, would I just be able to use a square wave generating IC with a fixed duty cycle (50%) and adjustable frequency?
I am guessing it should work ok, but just want to be sure.
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Inductor number codes
