WJEC Eduqas GCSE Electronics (Wales and beyond): complete guide to the components and the exams
A complete guide to WJEC Eduqas GCSE Electronics for Wales. Covers Component 1 (Discovering Electronics) and Component 2 (Application of Electronics), the Component 3 non-exam assessment, how the two written papers and the practical project are structured, the key equations, and how to revise each topic from systems and circuit concepts to operational amplifiers, timing and sequential logic.
WJEC Eduqas GCSE Electronics is a study of how electronic systems are designed, built and analysed, from basic circuit theory to logic, timing and control. WJEC Eduqas is currently the only exam board offering GCSE Electronics in the UK. The qualification is assessed by two written papers and a non-exam assessment (a practical project). This page is the index: below is a map of the components, the exam structure, the assessment, and how to study each topic.
The components
The specification has two examined components plus the practical task. Component 1 introduces the foundations; Component 2 applies them to more advanced systems.
- Component 1: Discovering Electronics
- Electronic systems and sub-systems (the input, process and output approach), circuit concepts (charge, current, voltage, Ohm's law, power, energy, series and parallel rules), resistive components (combining resistors, the potential divider, the LDR and thermistor, pull resistors and LED current-limiting), switching circuits (transistor and MOSFET switches, comparators and interfacing), applications of diodes (rectification and the Zener regulator) and combinational logic (gates, truth tables, Boolean algebra and NAND logic).
- Component 2: Application of Electronics
- Operational amplifiers (gain, bandwidth, clipping, inverting and non-inverting circuits and the mixer), timing circuits (RC networks, the 555 monostable and astable), sequential systems (the D-type flip-flop, binary counters, decade counters and displays) and interfacing and control (Schmitt triggers and choosing interfaces, and the microcontroller with flowchart control).
- Component 3: Extended system design and realisation task
- The non-exam assessment: a practical project to design, build, test and evaluate an electronic system.
Exam structure
WJEC Eduqas GCSE Electronics is assessed by two written papers and one non-exam assessment.
- Component 1 (Discovering Electronics): written examination, 1 hour 30 minutes, 40%.
- Component 2 (Application of Electronics): written examination, 1 hour 30 minutes, 40%.
- Component 3 (Extended system design and realisation task): non-exam assessment, 20%.
Both written papers include calculations, circuit reasoning, graph and timing-diagram work, truth tables, and design questions, as well as synoptic questions that draw on the whole specification. A calculator is allowed.
The non-exam assessment
Component 3 is a practical project worth 20% of the qualification. You analyse a real problem, write a design specification with measurable criteria, develop and test the sub-systems, build and test the complete physical circuit, and evaluate it against the specification. It applies the systems approach and the component knowledge from Components 1 and 2, built on your own hardware.
How to study WJEC Electronics
Electronics rewards confident calculation, clear circuit reasoning, and accurate diagrams.
- Work from the content statements. Each Component 1 and 2 topic is a checklist; questions are written from them.
- Drill the equations and units. Practise selecting equations and converting milliamps, kilohms and microfarads until automatic.
- Learn the standard circuits. Potential divider, transistor and MOSFET switch, comparator, 555 monostable and astable, D-type flip-flop and counters.
- Master truth tables and timing diagrams. These recur across combinational and sequential logic.
- Use the systems approach. Break every system into input, process and output, and remember to drive high-current outputs through a transistor or relay.
The components, topic by topic
Each topic has specification-level answer pages with worked exam questions and cross-links, plus an overview guide and a quiz. Browse the full set at /wjec-gcse/electronics/syllabus.
For the official specification
WJEC Eduqas publishes the full GCSE Electronics specification, the non-exam assessment criteria, past papers and mark schemes at wjec.co.uk. Always revise from the current specification and WJEC Eduqas's own past papers, because question style, the printed equation list and the electronic symbols are board-specific.
Electronics guides
In-depth written guides with paired practice quizzes.
- WJEC GCSE Electronics: applications of diodes overview
An overview of the applications of diodes content in Component 1 of WJEC Eduqas GCSE Electronics, covering the silicon diode's one-way behaviour, reverse-polarity and inductive-spike protection, half-wave rectification of AC to DC, and the Zener diode used with a series resistor for voltage regulation.
6 min readRead β - WJEC GCSE Electronics: circuit concepts overview
An overview of the circuit concepts content in Component 1 of WJEC Eduqas GCSE Electronics, covering charge, current and voltage, resistance and Ohm's law, the I-V characteristics of a resistor, lamp and diode, the power and energy equations, the series and parallel rules, circuit symbols and test equipment.
7 min readRead β - WJEC GCSE Electronics: combinational logic systems overview
An overview of the combinational logic content in Component 1 of WJEC Eduqas GCSE Electronics, covering logic levels, the NOT, AND, OR, NAND, NOR and XOR gates, truth tables, Boolean expressions and identities, simplification, NAND universality, and designing a logic system using a data sheet.
6 min readRead β - WJEC GCSE Electronics: Component 3 system design and realisation overview
A concise overview of Component 3 of WJEC Eduqas GCSE Electronics, the non-exam assessment (extended system design and realisation task), covering the design stages from analysing a problem to evaluating the finished system, and how it applies the knowledge from Components 1 and 2.
5 min readRead β - WJEC GCSE Electronics: electronic systems and sub-systems overview
An overview of the electronic systems and sub-systems content in Component 1 of WJEC Eduqas GCSE Electronics, covering the input, process and output sub-systems, system block diagrams, sensors, processing units, output devices and transducer drivers, and how the systems approach is examined.
7 min readRead β - WJEC GCSE Electronics: interfacing and control overview
An overview of the interfacing and control content in Component 2 of WJEC Eduqas GCSE Electronics, covering the Schmitt inverter and hysteresis for debouncing and cleaning signals, comparing transistor, comparator and Schmitt interfaces, and the microcontroller as a programmable IC with flowchart control programs.
6 min readRead β - WJEC GCSE Electronics: operational amplifiers overview
An overview of the operational amplifiers content in Component 2 of WJEC Eduqas GCSE Electronics, covering amplification and voltage gain, the gain-frequency response and bandwidth, clipping, the inverting and non-inverting amplifier gain equations, the summing amplifier (mixer), and the amplifier system block diagram.
6 min readRead β - WJEC GCSE Electronics: resistive components in circuits overview
An overview of the resistive components content in Component 1 of WJEC Eduqas GCSE Electronics, covering combining resistors in series and parallel, resistor codes and the E24 series, potential dividers, the LDR and thermistor as input sensors, pull-up and pull-down resistors and current-limiting an LED.
7 min readRead β - WJEC GCSE Electronics: sequential systems overview
An overview of the sequential systems content in Component 2 of WJEC Eduqas GCSE Electronics, covering the rising-edge-triggered D-type flip-flop, building 1-bit and 2-bit binary counters, frequency division, BCD and decade counters, seven-segment displays with a decoder/driver, the 4017 sequencer, and resetting for a custom count length.
6 min readRead β - WJEC GCSE Electronics: switching circuits overview
An overview of the switching circuits content in Component 1 of WJEC Eduqas GCSE Electronics, covering the npn transistor and n-channel MOSFET as switches, the voltage comparator as an IC switching circuit, setting a threshold with a potential divider, and interfacing an output with a transistor or relay.
6 min readRead β - WJEC GCSE Electronics: timing circuits overview
An overview of the timing circuits content in Component 2 of WJEC Eduqas GCSE Electronics, covering RC charging and discharging and time delays, the 555 monostable (single pulse, T = 1.1RC) and the 555 astable (continuous square wave, frequency and mark-space ratio).
6 min readRead β
Electronics practice quizzes
Multiple-choice drills with worked answer explanations. Your scores stay on this device.
- WJEC GCSE Electronics applications of diodes quiz14 questionsStart β
- WJEC GCSE Electronics circuit concepts quiz15 questionsStart β
- WJEC GCSE Electronics combinational logic quiz15 questionsStart β
- WJEC GCSE Electronics electronic systems and sub-systems quiz14 questionsStart β
- WJEC GCSE Electronics interfacing and control quiz14 questionsStart β
- WJEC GCSE Electronics operational amplifiers quiz14 questionsStart β
- WJEC GCSE Electronics resistive components quiz15 questionsStart β
- WJEC GCSE Electronics sequential systems quiz14 questionsStart β
- WJEC GCSE Electronics switching circuits quiz14 questionsStart β
- WJEC GCSE Electronics Component 3 system design and realisation quiz12 questionsStart β
- WJEC GCSE Electronics timing circuits quiz14 questionsStart β
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