Design and Application of Test Circuit of Coils'Same or Different Name Ends

A test circuit designed making use of inexpensive electronic components, in order to realize to determine coils’same or different name ends, by compared the tested coils with the standard ones, then observing the light-emitting situation of a light-emitting diode, and mainly meet the needs of a company industrial production, consequently, solved effectively test difficulty to this kind of coils ever before.