Combinational building blocks.
Understand digital circuits with illustrated explanations, worked examples, past-paper discussions and revision questions.
Study sections
Follow the order or choose a sectionBuilding Blocks and Equality Comparators
Nobody builds a house one grain of sand at a time. Builders use bricks, doors and windows : ready-made parts. Circuit designers work th…
02Decoders
A hotel has 8 rooms and a 3-digit binary room code. When the code 101 comes in, only room 5’s light should turn on, and every other lig…
03Encoders and Priority Encoders
A decoder turns a code into “one line on”. An encoder does the opposite : it sees which line is on and gives back its number in binary.…
04Multiplexers (MUX)
A TV has many channels but one screen . The remote’s channel number selects which channel reaches the screen. A multiplexer does exactl…
05How to Solve Week 4 Exam Questions
Week 4 (decoders, encoders, multiplexers) gives sure marks in every paper: true/false facts, delay, “read this MUX circuit”, “read this…