What the meter is for

The multimeter has six jobs on one dial, and the difference between them is bigger than it looks: two of the ranges watch the circuit, and the others drive it. Knowing which is which is the difference between a measurement and a damaged meter — and this lesson ends with the one rule that protects both.

A free lesson from Ohmwork, played entirely in your browser on a real circuit solver — about 20 minutes.

Play this lesson in your browser — no download, no sign-up, and nothing you build is sent anywhere.

The full Ohmwork workshop — in development for Mac and Windows — carries 64 lessons across five courses, six simulated Arduino boards running real compiled sketches, an oscilloscope, and fault-finding practice.