The sensor is a sophisticated device that is frequently used to sense and respond to electrical (or) optical signals. Usually, the output of the sensor will be in the form of an electrical signal or optical signal. In our daily life, we use different types of sensors frequently in various applications like the Infrared sensor is used to operate the TV remote, PIR sensor is used in automatic door opening and closing, LDR sensor is used in street lighting system, etc. In this article, e will discuss a few kinds of sensors and their uses in brief.
The term wireless RF stands for “wireless Radio Frequency Technology”. If you are just starting with radios, this article can help. It is proposed to give a basic understanding of radio frequency,as well work as a quick reference for those who “know their knowledge” but may be observed to brush up on that one place that they never quite understood. Radio frequency is a measurement signifying the oscillation rate of electromagnetic radio waves or electromagnetic radiation spectrum of frequencies ranging from 300 GHz to 9 kHz. With the use of transmitters and antennas, the radio frequency field can be used for several types of wireless communications.
The terms microprocessor and microcontroller have always been confused with each other. Both of them have been intended for real-time use. They share several mutual features and also they have important differences. Both the IC’s such as the Microprocessor & microcontroller cannot be well-known by looking at them. They are obtainable in different version starting from 6-pin to as high as 80-100-pins depending on the features.
The term ‘GPS’ stands for Global Positioning System module is a device that has become a most important tool in the surveillance field, scientific use, and tracking. This GPS modem is based on satellite navigation technology that provides the information of time and location in all weather situations anyplace on the earth. The main use of the GPS system is to track the vehicle or person’s location. A GPS receiver finds the exact location of an object in terms of longitude, latitude and also offers timing services, reliable navigation and positioning to the users at any place and anytime on the earth.This article discusses how GPS modem interfaces with an 8051 microcontroller working, and its applications.
The various electrical and electronics components and many other types of electronic devices use a semiconductor, rather than a conductor. A semiconductor is one type of material like Si (silicon), that has some of the properties, that has some properties of both the conductors and also insulators. In fact, they have termed a whole valley in California after it. In its clean state, Si behaviors an electric current poorly.But, if we add soils like phosphorus or boron to the Si, it conducts. When you add phosphorus, it becomes an “n”-type semiconductor similarly, we add boron, it becomes a “p”-type semiconductor. A P-type semiconductor has fewer electrons than a pure semiconductor and an N-type semiconductor has more electrons than pure semiconductors.When the regions comprising phosphorus and boron are next to each other in Si, you have a PN-junction. The flow of current is only in one direction across a PN-junction.