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Design, development and construction of an electronic controller for a CNC machine. The controller controls up to 3 stepper motors (up to 3 axes), has home and limit switches, and is optically isolated from the computer.

A system that stores and analyzes signals from different sensors. The system uses a hardware component that connects to a computer using a USB interface, and interfaces signals of different kinds (some even remote, using an RF link). The system uses simple .Net software to analyze the signals online, and to preform different kinds of tasks according to the signals. 

 The system was built in a part of a "Smart Home" project.

An introductory article about servo motors: What are servo motors? What is an RC Servo motor? Servo motors usages in robotics applications. Advantages and disadvantages of servo motors, comparison between servo motors and stepper motors. Servo motor control. Servo motor voltage, current, and wiring.

Stepper motors (also called step motors) are electronic motors that offer precise rotation control . Stepper motors are very precise (an average stepper motor can turn in about 0.9 to 1.8 degrees in each direction) and in a relatively high rotational speed.

Stepper motors can be found in various types of hardware components: printers (the printer head moves left and right by using a stepper motor), scanners, computer hard disks, and so on.