Question 1

What is NCEA AS 91639 about?

Accepted Answer

You need to design and build a working electronic system that uses sensors to collect data and actuators (moving parts or outputs) to control something in response to that data. You'll write the software to connect the sensors and actuators together, test everything works, and then improve it by making the hardware and code better quality. This is about making complex systems like traffic lights, robots, or environmental monitors actually function properly.

Question 2

What do students need to do for AS 91639?

Accepted Answer

1. Devise and apply functional sensor subsystems (e.g. proximity sensors) that interact with an environment and collect usable data 2. Devise and apply functional actuator subsystems (e.g. motor controls, displays) that respond to and change the environment 3. Write software that reads sensor data and controls the actuators, including things like converting analogue signals to digital data and processing that information 4. Test and debug your complete system to make sure sensors and actuators work together properly and meet the specifications you were given 5. Analyse and modify your hardware circuits and software code to improve how well the system works and the quality of the data it handles

Question 3

What's the difference between Achieved, Merit, and Excellence for AS 91639?

Accepted Answer

Achieved: You build a working system with functioning sensors, actuators, and software that connect together and meet the basic specifications, with evidence of testing and some debugging. Merit: You analyse what's not working well and skilfully improve both your hardware and software with clear documentation, demonstrating better data quality and system performance through your modifications. Excellence: You make substantial improvements to sensor accuracy, actuator performance, and software structure through careful analysis and modification, with well-annotated code and clear evidence that your system operates significantly better than the initial version.

Question 4

What mistakes do students typically make in AS 91639?

Accepted Answer

1. Students build the hardware and write the code but don't actually test it properly or don't show their testing/debugging process — examiners need to see evidence of what went wrong and how you fixed it 2. Software is poorly documented or hard to follow, with no comments or annotations explaining what the code does — this matters especially for Merit and Excellence where code clarity is specifically required 3. Students make only minor tweaks to their system rather than demonstrating genuine analysis and improvement, particularly for Merit and Excellence where 'skilfully' and 'substantially' improving performance is the key difference

Electronic interfacing · AS 91639

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The standard itself

Bundles

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