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Stepper motors and controllers, DC-motors and PWM-controllers. For more info, check Wikipedia Electric motor
Stepper motors and stepper motor controllers, unipolar and bipolar. For more info, check Stepper motor
Small electric brushed and brushless DC-Motors, motors with gearbox. For more info, check Wikipedia DC motor
Motor controllers for stepper motors and DC-motors. Motor control breakout boards, drivers, PWM driver units. For more info, check Wikipedia Motor controller, Wikipedia Pulse-width modulation