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From: Lasse Langwadt <llc@fonz.dk>
Newsgroups: sci.electronics.design
Subject: Re: Inductance meter for BIST
Date: Thu, 11 Apr 2024 01:16:35 +0200
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On 4/10/24 05:18, John Larkin wrote:
> On Tue, 9 Apr 2024 22:58:30 +0200, Lasse Langwadt <llc@fonz.dk> wrote:
> 
>> On 4/9/24 02:17, john larkin wrote:
>>> I can build this into my new programmable inductor module, for
>>> self-test. With a 1% cap, it should be plenty good. L range will be
>>> 750 mH down to maybe 10 mH, part of simulating solenoids and torque
>>> motors and such.
>>>
>>> If I add a switch to open R3 and run some current through R1, it can
>>> measure series resistance too.
>>>
>>> https://www.dropbox.com/scl/fi/tn8lpk38677ioylhdkget/P955_L-meter.jpg?rlkey=xynqyzfc2x020llr3a945c0td&raw=1
>>>
>>> https://www.dropbox.com/scl/fi/gojlqxj23r4m57ke9jhui/Ind_Meter_1.asc?rlkey=if40kmtiz49gp62bacfvju3uv&dl=0
>>>
>>
>> https://github.com/coreWeaver/LC-Meter/blob/main/LC%20Meter%20v1.0/1.%20Schematic%20and%20Gerber%20UPDATED%20Apr.08%2C%202021/LC%20Meter%20-%20Schematic.pdf
> 
> Are there specs on that one? I didn't see anything like a manual.
> 

afaict there's a video explaining all the fucntions and equations 
https://github.com/coreWeaver/LC-Meter