DC Motor

The DC Motor are certainly the most simplest motors for Maker activities. Just apply a voltage and they start to rotate. If it turn the wrong way just invert the connexion and it will turn the other way. The most significant usage of such motor are is robotic propeling.
Such motors also exists with gearbox. Gearbox decrease the motor speed and increase the torque on the shaft. Such motor can easily be controled from electronic with a H-Bridge like the L293 (L298) or even with more advanced motor controler board.