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Stepper motors
- Rotates only by fixed amounts, and controlled by a sequence of digital outputs
- Stepper motors typically (for bipolar steppers) have 4 wires, two each for adjacent coils
- Other, more complicated drive patterns such as full-step drive (two phases on), half-stepping etc. possible
- Step angles of 1.8o, 3.6o, 7.2o etc. are typical
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To do : Lookup and go through Arduino Stepper Library
Other Motors
- Brushless DC (BLDC) motors
- Similar to DC motors, but an electronic circuit replaces brush + commutator. Used in electric scooters etc.
- Induction / synchronous motors
- Used in fans etc, works on AC; the mechanism of operation is somewhat different from that of DC motors