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.” ...

What type of equipment is best to use for low-voltage test of battery cells? What is an electronic load, and how does it work? How to overcome a major limitation with the low-voltage-discharge test.

I am helping a friend who is having horrible dialup problems. He is lucky to stay connected for 10-15 minutes at a time. This problem has continued through several modems & at least 2 computers. He is ...