Learn how to test a transformer: insulation resistance, TTR, winding resistance, polarity, continuity, and dielectric checks.

While using a digital multimeter to diagnose electrical problems on customers’ equipment, I frequently hear the comment, “I’ve got one of those multimeter things, but I never learned how to use it.” ...

This short article will deal with testing power MOSFETs using an ordinary digital multimeter. Anybody who have ever tried this must have marvelled at strange readings and short circuits found even on ...