This 97-page Study Guide covers the full curriculum, including energy bands and semiconductor theory.
Basic concepts of feedback and control. Why You Need Quality N4 Notes (PDF format)
Power supplies convert AC mains voltage into usable DC voltage for industrial machinery.
This module focuses on the mathematical analysis of complex DC circuits. Key theorems include:
This module forms the mathematical and logical foundation of the course. You will learn to analyze complex circuits using several methods.
Unlike standard diodes, Zener diodes are designed to operate safely in the reverse breakdown region. They maintain a constant voltage, making them ideal for voltage regulation circuits. Module 3: Rectifiers and Power Supplies
Uses four diodes in a bridge configuration. It delivers high efficiency without requiring a center-tapped transformer. Filter Circuits
Connect in series with the load to smooth out current fluctuations. Module 4: Transistors
Notes provide key formulas and theoretical summaries, reducing revision time.
Connect positive to P-type and negative to N-type. The depletion layer narrows, allowing current to flow.
Download past exam papers (2015–2024).
Operates strictly in Saturation (fully ON) or Cut-off (fully OFF).