← Electronics syllabus

EnglandElectronics

Component 2 Application of Electronics

6 dot points across 6 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How does the 555 timer generate a continuous square wave or a single timed pulse?

Timing circuits: the 555 timer in astable mode (frequency, period and duty cycle) and monostable mode (pulse duration), and oscillators for clock generation.
An Eduqas A-Level Electronics answer on timing circuits: the 555 timer in astable mode with its frequency, period and duty cycle, the monostable mode producing a single timed pulse, and the role of oscillators in generating a clock signal for digital systems.
14 min answer →

How are numbers represented in binary and hexadecimal, and how are signed numbers added with two's complement?

Number systems: binary, denary and hexadecimal conversion, binary addition, two's complement for signed numbers, and binary-coded decimal.
An Eduqas A-Level Electronics answer on number systems: converting between binary, denary and hexadecimal, binary addition with carries, two's complement representation of signed numbers and subtraction by addition, and binary-coded decimal for displays.
13 min answer →

How do we design a combinational logic circuit from a truth table, and minimise it with a Karnaugh map?

Combinational logic design: deriving a Boolean expression from a truth table (sum of products), minimising with Karnaugh maps, and standard building blocks (half and full adders, decoders, encoders, multiplexers).
An Eduqas A-Level Electronics answer on combinational logic design: deriving a sum-of-products Boolean expression from a truth table, minimising it with a Karnaugh map, and the standard building blocks: half and full adders, decoders, encoders and multiplexers.
14 min answer →

How do chained flip-flops count clock pulses and shift data, and how is the count length set?

Counters and shift registers: the ripple (asynchronous) counter, the synchronous counter, modulo-n counting and resetting, and serial and parallel shift registers.
An Eduqas A-Level Electronics answer on counters and shift registers: the ripple (asynchronous) counter built from toggling flip-flops, the synchronous counter clocked together, modulo-n counting by resetting at a chosen count, and serial and parallel shift registers for moving and converting data.
13 min answer →

How do logic gates, truth tables and Boolean algebra let us describe and simplify digital logic?

Logic gates and Boolean algebra: the gates AND, OR, NOT, NAND, NOR, XOR and their truth tables, Boolean expressions, the laws of Boolean algebra, De Morgan's laws, and universal gates.
An Eduqas A-Level Electronics answer on logic gates and Boolean algebra: the gates AND, OR, NOT, NAND, NOR and XOR with their truth tables, writing and reading Boolean expressions, simplifying with the laws of Boolean algebra and De Morgan's laws, and the universal NAND and NOR gates.
14 min answer →

How does feedback give a logic circuit memory, and how do the SR, D and JK flip-flops behave?

Sequential logic: the difference from combinational logic, the SR latch, the clocked D-type and JK flip-flops, edge triggering, and the flip-flop as a one-bit memory.
An Eduqas A-Level Electronics answer on sequential logic and flip-flops: how feedback gives memory, the SR latch and its forbidden state, the clocked D-type and JK flip-flops, edge triggering, and how a flip-flop stores one bit, the building block of counters and registers.
14 min answer →