The fault you cannot see

In f01 the fault was in the wiring, and a careful reader could have spotted it by staring at the drawing. This one is INSIDE a component. The schematic is perfect, every value is correct, and the only way to find it is with a meter — which is what real fault-finding is actually like.

A free lesson from Ohmwork, played entirely in your browser on a real circuit solver — about 30 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.