Classic Control course

Contactor and relay control circuits from the very beginning: get to know each device, see its real look and symbol, try it, and then wire the circuit by hand wire by wire, switch on the power, and the simulator tells you whether it's right or wrong, and why.

Completely new to electricity? Start with the Electrical Basics course first, then come back here.

The full course: 9 lessons and 24 practical exercises
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How to study here

  1. Definition: what it is and where it's used
  2. Look and symbol: the real device and its IEC and NEMA symbols
  3. Try it: press, turn and move it, and watch the contacts
  4. Wire it: terminal → terminal, then switch on the power
  5. Questions: quick ones to make sure you've understood

The fundamentals start here, in order

Practical exercises (24) each exercise is a power circuit + a control circuit · exercises 1–4 in the contactor lesson, 5–13 in lesson 8, 14–24 in the timers lesson · and lesson 9 adds 13 more exercises on the advanced topics

Advanced topics

Course Completion Certificate

Symbols according to IEC 60617 and NEMA ICS 19, and terminal numbers according to IEC 60947-5-1. Your progress is saved on this device only. Check the numbering of the device in your hand against the manufacturer's catalogue.
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