Key term
CCEA A-Level Technology and Design 8900
Material Selection and Wood
Metals
Plastics
Composite and Emerging Materials
Processing Materials
Product Analysis and Design Communication
Design for Manufacture, Quality and Safety
Electronic Control SystemsOption A
Topic overviewControl systems, feedback and electronics safetyResistors, Ohm's law and power ratingsCapacitors and RC timingPotential dividers, sensors and comparatorsSwitches, pull-up and pull-down resistorsOutput devices and LEDsTransistors, Darlington pairs and thyristorsLogic gates, truth tables and flip-flops555 monostable and astable timers
Microelectronic Control SystemsOption A
Topic overviewMicrocontroller systems, ADCs and DACsStrain gauges and bridge circuitsOptical switches, encoded discs and Schmitt triggersOp-amp amplifiers and gainZener diodes and voltage regulatorsKarnaugh maps and binary countersSeven-segment, LCD and dot matrix displaysPIC flowcharts and programmingDC motors, stepper motors and driver circuits
Mechanical and Pneumatic ComponentsOption B
Topic overviewOpen and closed loop mechanical and pneumatic controlSafe working with compressed air and mechanismsLevers, linkages and momentsGear types and gear trainsPulleys, belts, chains and shaft fixingsCams, cranks and converting motionCompressed air supply and pneumatic valvesCylinders, shuttle valves, restrictors and reservoirsPneumatic circuits for logic, timing and speed control
Mechanical and Pneumatic SystemsOption B
Topic overviewHydraulics, system limitations and plant safetyTorque, work, power and air consumptionVacuum handling, proximity sensors and 5/3 valvesSequential and cascade pneumatic circuitsCam profiles and follower displacement diagramsGear geometry, pulley blocks and ratchetsToggles, treadles, shafts and couplingsFriction, brakes and clutchesBearings, lubrication and seals
Designing and Manufacturing ProductsOption C
Topic overviewResearch, questionnaires and specificationsIdea generation, critiques and computer simulationManufacturing planning and product evaluationCFRP, GRP, Kevlar and tungsten carbideSmart materials, nanotechnology and biophotovoltaicsIsometric, perspective and assembly drawingLaminating, steam bending, cutting and printing processesRisk assessment and product safety lawScales of production, JIT and cell productionQuality assurance, ISO 9001 and continuous improvementDesign influences and intellectual property rights
Product Design in Industry and SocietyOption C
Topic overviewLife-cycle environmental impact and climate changeThe 6Rs, waste and environmental legislationSustainable metals, plastics and degradable polymersProduct life cycles, consumer types and relaunchesCAD, CAM, 3D scanning and quick-change mouldingMarket pull, technology push and market strategyPrice, place and promotionJigs, fixtures and ICT in quality controlDesign for maintenance, inclusion and scale productionRendering, typography and presentationDyson, Baylis, Memphis and Apple
Product Development
Product and System Design and Manufacture
Product Analysis and Design Communication
Freehand sketching and mixed media
- 3 things to know
- AS 1 Paper 1
Overview
Mixed media, crating and construction lines, thumbnails, line weight, tone, markers, metal and pastel rendering, annotation, digital sketching, and scale drawing calculations.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
What is crating in freehand sketching?
Key term
Why are faint construction lines drawn at the start of a sketch?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is mixed media in design communication?
Model answer
Mixed media is the combination of several drawing materials in one presentation, such as pencil, marker, coloured pencil and pastel. Each medium is used for what it does best.
- 2
What is crating in freehand sketching?
Model answer
Crating is drawing a light box that encloses the whole object, then carving the form out of it. The box keeps proportions and perspective consistent.
- 3
Why are faint construction lines drawn at the start of a sketch?
Model answer
Construction lines set out proportions and alignment lightly, so mistakes are easy to correct. Firm outlines are added once the form looks right.
- 4
What are thumbnail sketches, and when are they used?
Model answer
Thumbnail sketches are small, quick drawings that capture the essence of an idea. Designers use them early on to explore many ideas fast.
- 5
How does varying line weight improve a freehand sketch?
Model answer
Thick outlines separate the object from the background, while thin lines show internal edges and details. The contrast makes the form read clearly.
- 6
How is tone used to make a sketch look three-dimensional?
Model answer
Tone shades each face according to how much light it receives, from light to dark. The shading shows which faces turn away from the light source.
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