We use the first project in the 2027 HKDSE Design and Applied Technology (DAT) School-based Assessment (SBA) brief — “Toilet Paper Dispenser” — as a teaching scenario. This workshop shows how to turn the brief into learning activities that can be taught, completed and assessed. Teachers work through the core tools and practical workflow, then adapt the activities to students’ levels and available lesson time.

1. Design needs and specifications

• Use the toilet paper dispenser scenario to identify design opportunities and user needs.

• Turn those needs into clear, testable specifications, then plan components and functions around the design goals.

2. 3D modelling and prototyping

• Use Autodesk Fusion feature-based modelling to create dispenser components. Export dimensioned drawings, renderings and files for 3D printing or laser cutting.

• Explore mechanical components and assembly, checking whether parts work together as intended.

• Test prototypes, adjust dimensions and structure, and practise iterative improvement.

3. Basic programming and control

• Use Micro:bit/Arduino to demonstrate simple programme logic and control flow.

• Assemble electronic components and practise input/output connections, then test them with a physical prototype.

Using the controller board with this course

The course can be paired with the controller board designed for this project. It gives teachers and students a suitable control component to start with, so they can focus on the overall solution, part design, assembly and functional testing. The course and product complement each other. For details, see the 2027 HKDSE DAT SBA Toilet Paper Dispenser Controller Board.