Basic Electronics and crystal physics provides understanding of introduction of transistor devices and circuits. The text provides clearly explained concepts written in an easy to read conversation style-establishing the foundation needed for understanding to the transistor, h-parameters, feedback in amplifier, oscillators and crystal structure in this chapters. Starting in Chapter 1 DC load line, transistor biasing and stabilization of operating point has been simplified for easier students use and understating. In Chapter 2 small signal amplifier, h-parameters and multi stage amplifier provided for calculation for gain, impedance, multistage amplifier and decibel. In Chapter 3 for feedback amplifier has been discussed for types of feedback, distortion of noise, increase in impedance, decrease in impedance, bandwidth. Starting Chapter 4 which based on feedback for oscillators like various types i.e. Hartley oscillators, Colpitts oscillators, Wien bridge oscillators etc. In Chapter 5 for basic crystallography for solid metallic crystal structure and understanding for seven crystal system for Bravis Lattice and crystal symmetry.