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and this one is not digital, but quite simple to realize, and in my minds, it's enought for esr testing. if you want a real digital one, you've better look at a lcr meter. a nice one is winner of circuit cellar psoc contest
available at : **broken link removed**
Elektor ESR meter is god choice. It measures up to 200 ohms at 100kHz.
Resolution is 0.1 ohm. DVM can be low price (15euro) Panell Meter from Conrad which is equal to the DVM in project.
The scanned document in French from Kripton2035 is exactly the electronic English document from duster.
So it is better to download 2 documents from duster, which included PCB artwork, smaller, in English, and waste no point, while French document is big, and you have to "pay" by point.
I am very sorry Kripton2035 as I did not intend to make you uncomfortable. Simply there is English version of the document came after yours and I would like to warn people as duster did not make clear that they are the same but in different languages.
BTW I now know there is the link from mirror that needs no point, from your suggestion.
this esr meter you just found is based on a zilog controler, and the source nor hex arent available... you must buy the preprogrammed chip to the authors of the kit.
if you buy this kit, you will get with it all the infos you need to build it ! dont need more help.
if you dont buy the kit, you wont be able to program it and not use it !!!
just read the pdf you send carefully ...
you will have difficulties to find the transformer T1 of the design.. also the 50µA display...
better look at the analog esr meter I gave at the beginning of the post, it uses standard (and availables) components.
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