A Presentation Pack consisting of 51 slides and 8 Worksheets (18 pages) which includes chapters related to the working principle and components of a cathode ray oscilloscope, understanding the concept of semiconductors, the working working principle and composition of diodes, the usage of a diode as a half wave and full wave rectifier, the understanding of transistors (p-n-p transistors & n-p-n transistors), functions and applications of transistors, and lastly, understanding the fundamentals of logic gates with basic logic gates (NOT, AND, OR, NOR, NAND). This presentation pack is designed for a 5-6 consecutive lessons. Suitable for students in KS4,