Digital systems have internal and external components that perform different functions. For example, external components for inputting data include a keyboard, microphone and stylus. Internal processing components include the central processing unit. External output components include speakers, projector and screen. Data and information storage components include cloud and external devices. Devices can be connected via a network that enables data to be transmitted. Students can explore the use of wireless networks through controlling devices remotely via Bluetooth. This sequence culminates in students designing and creating a digital solution that incorporates data being transmitted via an input device or network.
Flow of Activities
Input devices allow us to enter raw data into a computer. A digital system, such as a tablet or desktop computer, processes the data. It then produces outputs that are communicated using an output device. Input devices can be manual or automatic.
Data such as text, images, sound and numbers are input into a digital system using a range of digital devices. The output is communicated using different components; for example, a speaker for sound.
To enable data input, specific software may be required; for example, to gain audio and video input from a webcam the digital system requires suitable software. This software is also used to output the webcam data to a screen.
Users of digital systems need to have the ability to enter data into computers. Various peripheral devices have been created to fulfil this need and this process of invention continues.
Bluetooth low energy is an emerging low-power wireless technology developed for short-range control and monitoring applications.
As students design a digital solution, they can apply their understanding of the way in which data is input and output by digital systems. Students empathise with the target audience, going through a process of ideation and then design. Creating enables students to test whether their design works as expected.