Construction and Applications of Digital Systems


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  • Aim and purpose

This unit aims to give learners an understanding of modern digital systems and technology and the skills needed to build and test a range of digital electronic circuits.


  • Unit introduction

Digital electronics play an integral part in modern society. Their wide application, from washing machines and car management systems to street furniture devices (eg turning street lighting on and off), means that there is an increased need for safe, low maintenance, energy-efficient systems. These new systems also frequently
use alternative energy sources and have their eventual disposal (e-waste) taken into account from their

This unit will give learners an understanding of recent advances in digital electronics and the new technologies
that often replace older electrical and electronic systems (legacy systems). Learners will also develop an
understanding of how the components of an electronic system are connected together (interfaced) to enable
analogue signals to be transmitted digitally. For example, interface circuit devices such as optocouplers can
transfer an electrical signal from one circuit to another while electrically isolating the two.

Learners will also have the opportunity to build and test different digital systems, enabling them to understand
circuit life cycles, circuit costs and build and test methods.


  • Learning outcomes

On completion of this unit a learner should:
1 Understand energy efficient use of modern digital electronics technology
2 Understand the transmission of analogue data in a digital system
3 Understand the selection and use of interface devices and logic devices for digital circuits
4 Be able to build and test digital systems