Semiconductor Devices Circuits by Engineering Hub is an Android application that offers a great learning resource for electrical and electronics engineering students. The app covers all the basics and advanced concepts, principles, laws, and theories of electronic semiconductor devices and circuit theory. It is an excellent reference tool for USA, UK, Canada, Australia, and Indian universities, engineering colleges, technical institutes, polytechnic, ITI, and research institutes.

The app is divided into five chapters, covering topics such as the Theory of P-N junction, Transistor using h-parameters, Negative Feedback, Turn-on and turn-off characteristics of an SCR, and Operational amplifier characteristics. Each chapter is further divided into sub-topics with graphic illustrations. The app also includes quizzes, blogs, and videos to enhance the learning experience. Overall, Semiconductor Devices Circuits is an excellent app for anyone looking to learn about semiconductor devices and circuits in a comprehensive and accessible way.