The read/write heads of a hard disk drive are moved back and forth over the magnetic platters by a linear motor. This motor consists of a coil that moves in a strong magnetic field, combined... Read more
PWM waveforms are commonly used to control the speed of DC motors. The mark/space ratio of the digital waveform can be defined either by using an adjustable analogue voltage level (in the ca... Read more
Eenvoudig, apart en toch een doel, dat The design brief for this robot was that it had to be simple, yet unusual, and also have a specific purpose. But should we really call this a robot? It... Read more
Driving the ‘small’ motors that may be used in robotics doesn’t usually pose much of a problem. Servo motors actually have their own drive electronics, stepper motors can b... Read more
This circuit is intended for motion control applications, a common occurrence in robotics! This affordable PWM DC Motor controller can control any PMDC motor specified at 12 V to 30 V and 3... Read more
When we’re not using a stepper motor to ensure precise positioning of a robot element, it can be used as a traction motor, in place of the stand-ard modified servos presented else-wher... Read more
If you look at the chassis of the zBot vehi-cle, you’ll find two parts requiring intel-ligent control: the steering servo and the DC motor. The so called H-bridge is the normal circuit... Read more
This simple circuit drives DC motors with a maximum current of 1 A and can be built with readily available components. The output voltage is adjustable between 0 and 14 V and the polarity ca... Read more
Sometimes it’s necessary to add a D/ A converter to a microcontroller for a specific application. This can be fairly simply accomplished by interfacing an off-the-shelf D/A converter t... Read more
Stepper motors are available in several versions and sizes with a variety of operating voltages. The advantage of this general-purpose controller is that is can be used with a wide range of... Read more
