Stepper motors are used in a wide variety of applications, including computer peripherals like printers, scanners, CD drives, camera lenses, etc. In this first article, in a series of articles on stepper motors, we will introduce the reader to the theory behind the working and control of a stepper motor.
A GSM modem is a specialised type of modem which accepts a SIM card, and operates over a subscription to a mobile operator, just like a mobile phone. These modems are more frequently connected to computers which allow the computers to communicate with the mobile network. They are most probably used for sending/receiving SMS. This article explains how to connect a GSM modem with the ZKit-51 and how to program it to send SMS.
Generally Thermometer is used to measure the ambient temperature. This article explains you about how to design a simple Thermometer using a temperature sensor.