?After many years of reading technical publications one of my most
interesting "finds"
?is the following from EDN magazine ( edn.com ):
//
This circuit plus a frequency counter or oscilloscope measures
unmarked inductors.
//
The most frequent application for me is in working with SMPS
transformers although
this is not mentioned in the article.
With a scope, it is possible to determine the winding ratio, phase,
and even make
a close guess as to the number of turns.
To do this, assuming that you have the space, you wind on a given
number of turns,
pulse the transformer with this tester and observe the other winding
on the scope.
As an added benefit to this you can short this added winding while
driving and
watching another winding as a test for shorted windings in the
transformer.
Lots of other uses for the small and inexpensive tool.
I'm just finishing the building of another one of these using a
solar pathway
light as a starting point.
It should be always charged up and ready to go just from the ambient
light in my shop.
