Advanced techniques with the multimeter

Measure while it works: check a charger or adapter against its label, find a voltage drop across a bad contact, measure current in series (and move the red lead back afterwards!), and use diode mode to test LEDs. Voltage in parallel, current in series, resistance with the power off.

CHECKLIST · AFTER THE VIDEO

I tested an adapter or USB charger against its label
I found where voltage drops in a circuit
I measured current in series and put the lead back
I identified the legs of an LED with diode mode

QUICK QUIZ · 1 OF 3

How do you measure current?

QUICK QUIZ · 2 OF 3

A switch in a working circuit shows 2 V across it when ON. Why?

QUICK QUIZ · 3 OF 3

Advanced techniques with the multimeter

How do you measure current?

A switch in a working circuit shows 2 V across it when ON. Why?

After measuring current you must…