i look for circuit for digital meter for 0.1uH-10uH to DMM.
Unless you're willing to spend BIG $$...
From another site:
"When I have no suitable inductancemeter available, I use the resonance method, based on the Thomson formula:
https://en.wikipedia.org/wiki/Resonant_circuit
You need a good reference capacitor, say 100nF 0.5% or 1%, polystyrene or polypropylene, you make a tank circuit with the unknown coil and you feed the circuit via a resistor of some Kohm.
You connect a scope across the circuit and you sweep your generator until you find a signal peak; you then calculate the inductance using the reverse Thomson formula: 1/C*(6.28*F)².
With 100nF and 1µH, the frequency is around 500KHz.
The signal generator has to be preferably sinusoidal, otherwise you will get parasitic peaks at harmonic frequencies. Even if it is the case you can still get the correct value by selecting the highest and strongest peak.
The method is very accurate and only depends on the accuracy of the reference cap. In addition you can select a cap value giving a resonance frequency near the intended operating frequency of the inductance, giving an even better accuracy."
unclejed613 also has some good ideas for a
series resonant circuit that would be more accurate...