Specification points
WJEC GCSE Electronics C490QS
89 points in 3 topics, with WJEC's codes and titles.
Grade boundaries·WJEC command words
Codes and titles are read by a script from WJEC's published specification and have not been checked by a person. What each point covers is in the specification itself: WJEC’s specification.
C1 Component 1: Discovering Electronics
- C1.1 Electronic Systems and Sub-systems
- C1.1(a) Sensing, processing and output sub-systems
- C1.1(b) Transducer drivers
- C1.1(c) Designing and testing electronic systems
- C1.2 Circuit Concepts
- C1.2(a) Circuit symbols and circuit diagrams
- C1.2(b) Current and voltage rules in series and parallel circuits
- C1.2(c) Using test equipment to measure circuits
- C1.2(d) Voltage, current, resistance, energy and power in circuits
- C1.3 Resistive Components in Circuits
- C1.3(a) Resistors in series and parallel
- C1.3(b) Equations for resistor combinations
- C1.3(c) Selecting resistors: colour codes, E24, tolerance and power
- C1.3(d) Input sensors, switches and pulse generators
- C1.3(e) Sensing circuits using voltage dividers
- C1.3(f) Switches with pull-up and pull-down resistors
- C1.3(g) Voltage divider equation in sensing circuits
- C1.3(h) Current-limiting resistors for LEDs
- C1.4 Switching Circuits
- C1.4(a) MOSFETs and npn transistors in switching circuits
- C1.4(b) The MOSFET equation
- C1.4(c) Rules for npn transistor circuits
- C1.4(d) Voltage comparator ICs
- C1.4(e) Comparing MOSFET, transistor and comparator switching circuits
- C1.4(f) Designing switching circuits from data sheets
- C1.5 Applications of Diodes
- C1.5(a) I-V characteristics of a silicon diode
- C1.5(b) Diodes for protection and half-wave rectification
- C1.5(c) Zener diodes in voltage regulation
- C1.6 Combinational Logic Systems
- C1.6(a) Two-state logic levels
- C1.6(b) Logic gates: NOT, AND, OR, NAND and NOR
- C1.6(c) Truth tables from specifications and circuits
- C1.6(d) Analysing gate systems with truth tables
- C1.6(e) Boolean algebra and Boolean identities
- C1.6(f) Designing logic gate processing systems
- C1.6(g) Simplifying logic circuits with NAND gates
- C1.6(h) Designing systems from a truth table
- C1.6(i) Selecting logic ICs from data sheets
C2 Component 2: Application of Electronics
- C2.1 Operational Amplifiers
- C2.1(a) Amplifiers and voltage gain
- C2.1(b) Gain-frequency graphs and bandwidth
- C2.1(c) Voltage-time graphs for amplifier signals
- C2.1(d) Non-inverting and inverting op-amp amplifiers
- C2.1(e) Clipping distortion in amplifiers
- C2.1(f) Op-amp gain equations
- C2.1(g) Summing op-amp mixer circuits
- C2.1(h) Block diagram of an amplifier system
- C2.2 Timing Circuits
- C2.2(a) Time delays from RC networks
- C2.2(b) Charging and discharging capacitors in RC circuits
- C2.2(c) Changing the time delay of RC timers
- C2.2(d) The 555 monostable timer
- C2.2(e) The 555 astable timer: period and mark-space ratio
- C2.2(f) Measuring astable output with an oscilloscope
- C2.2(g) Frequency and mark-space ratio equations for 555 astables
- C2.2(h) Circuit diagrams for 555 monostable and astable timers
- C2.3 Sequential Systems
- C2.3(a) D-type flip-flops: data transfer, latches and counters
- C2.3(b) Timing diagrams for D-type flip-flops
- C2.3(c) Truth tables for a 7-segment display
- C2.3(d) Binary and BCD counters
- C2.3(e) Single-digit decimal counting systems
- C2.3(f) Counter systems with combinational logic
- C2.3(g) Sequencers using a 4017 decade counter
- C2.4 Interfacing Digital to Analogue Circuits
- C2.4(a) Schmitt inverters and debouncing
- C2.4(b) Interfaces between analogue and digital systems
- C2.4(c) Designing interface circuits
- C2.5 Control Circuits
- C2.5(a) Microcontrollers as programmable ICs
- C2.5(b) Interface sensing circuits and output devices with microcontrollers
- C2.5(c) Flowchart programs for microcontrollers
- C2.5(d) Applications of microcontrollers
C3 Component 3: Extended system design and realisation task
- C3(a) Analysing a problem to develop solutions
- C3(b) Developing a design specification
- C3(c) Proposing an electronic system of sub-systems
- C3(d) Predicting how electronic systems behave
- C3(e) Designing, building, modelling and modifying an electronic system
- C3(f) Planning tests and choosing techniques and instruments
- C3(g) Evaluating practical risks
- C3(h) Carrying out tests accurately and safely
- C3(i) Taking and recording measurements on circuits
- C3(j) Reporting results using scientific conventions
- C3(k) Evaluating the system against the design specification
- C3(l) Suggesting improvements after evaluation