A/L ICT Lesson 04: Logic Gates & Digital Circuits

Bilingual lesson notes for Unit 4 of the Sri Lankan GCE A/L ICT syllabus. This lesson covers basic and compound logic gates, Boolean algebra laws, De Morgan’s theorems, Karnaugh maps (K-Maps), and combinational and sequential circuits such as Adders and Flip-Flops. Features interactive logic gate simulators, structured essay questions, 5-option MCQs, and flashcards.