I. Introduction Touch screen technology enables direct interaction with devices through touch. Using either capacitive or resistive methods, these screens detect user input, translating it into commands. Widely used in smartphones, tablets, and kiosks, touch screens offer intuitive navigation, eliminating the need for physical buttons and enhancing user experience across various applications. Understanding how touch screens work is crucial for users and developers alike. It enhances user experience by ensuring effective interaction, informs choices in device selection, and guides troubleshooting. For developers, knowledge of touch technology is vital for creating intuitive applications and improving interface design, ultimately leading to greater user satisfaction. This blog aims to explore why touch screens predominantly respond to fingers, delving into the science behind touch sensitivity. By examining the principles of capacitive and resistive technology, we will uncover the
What is a transistor? A transistor is a semiconductor device which is used for switching electrical signals. In other words it is also considered as electrical switch. It is one of the basic components of modern electronics. Now a days wide range of transistors are available for various purposes like amplifying signal, switching, putting logic to a circuit etc. Transistors are either available as discrete devices or within the integrated circuits (ICs). History of transistor In early 1900s thermionic valve or vacuum tube technology was introduced, but these devices were expensive, bulky and also required powering by a battery. Soon afterwards the Cat's Whisker detector was discovered which is known today as semiconductors. To replace vacuum tube technology, the point contact transistor was introduced which can amplify or switch electrical signals. Bell Labs was the first recognized organization to work on alternatives of vacuum tube technology. On December 16, 1947 , Bar