A direct current (DC) motor is a cheap and simple type of electric powered motor. DC motors have a high number of rotations per minute (RPM) varying from 2000 to 10000 rpm. The rotation direction can be reversed by reversing the current. You can do that by using a so-called H-bridge motordriver. A downside of these motors is that they do not have much power or torque. Therefor they are not suitable for moving objects without gears or another type of transmission.

Specifications

  • Voltage (V)
  • Current (A, usually specified without load and at optimal efficiency)
  • Rotation speed (rpm, usually specified without load and at optimal efficiency)
  • Torgue (Nm, usually specified at optimal efficiency)
  • Stall torque(Nm, the torque at which the motor will stop turning)
  • Shape and diameter of the axis connection.

Note: since a motor contains coils, always use a flyback diode in reverse direction to protect the remainder of your circuit.