The book "Basic Electronics and Instrumentation" is primarily intended to serve as a textbook in accordance with the syllabus of Basic Electronics offered by various universities in India as well as abroad.The whole text has been divided into six modules and every module is divided into chapters. Module 1 introduces the basics of circuit analysis and electrical machines. Module 2 introduces the basics of electronic devices and circuits. Module 3 introduces the basic concepts of electronic instrumentation. Module 4 discusses about the Waveform generators/oscillators. Module 5 introduces the Basics of digital electronics. Module 6 discusses about the Interfacing circuits.