Sequential Logic SCQF Level 7

Enhance your understanding of sequential logic devices and circuits.


Why take this course?

Much of the developments seen today in modern technology are down to the techniques you will study in this unit - computers, internet technology (switches hubs and routers), CD and DVD technology, mini disks, MP3 players, electronic musical instruments, MIDI, MP3 players, mobile phones, satellite communications, CAD/CAM systems - the list goes on. 

This Unit was developed for the HNC and HND Electronics Group Awards, but may also be taken as a stand alone HN Unit. Its purpose is to provide you with the necessary knowledge to understand the organisation of sequential logic devices and circuits, and to develop skills to design, simulate, build and test sequential logic circuits. 

Credit points and level: 1 HN credit at SCQF level 7: (8 SCQF credit points at SCQF level 7).

What you will experience

You will learn how Sequential Logic Circuits are organised, how they are different from combinational logic circuits and also how they are constructed using a mixture of gates and bistables. When you studied combinational logic you learned about the basic building block of a combinational logic circuit - the gate; in this unit you will learn about the basic building block of a sequential logic circuit - the bistable. You will investigate the operation of the most common bistables and how they can be connected to form sequential logic circuits, and also learn how to design the two major classes of sequential circuit - the sequence generator and the sequence detector (these circuits are at the heart of all of the technologies mentioned above). 

In modern electronic design, computers are used to simulate designs before going to the expense of production. This Unit will teach you how to simulate your designs on computer, and allow you to develop practical skills that will enable you to successfully build and test the designs you have created. 

You will be required to undertake both written graphical, computer simulation and practical assessments. The assessment for outcomes 1, 2 and the shift register block diagrams part of outcome 3 are combined into one assessment paper. This paper should be taken by candidates at one single assessment event, lasting one hour. The assessment paper should be composed of a suitable balance of short answer, restricted response and written graphical exercises as specified for each outcome. Assessment should be conducted under controlled, supervised conditions.

The design part of outcome 3 should be carried out under closed book conditions followed by the simulation, build and test assessment for outcome 4, carried out as an assignment. The design, simulate, build and test should be done within 3 hours. It should be noted that candidates must achieve all the minimum evidence specified for each outcome in order to pass the unit.

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Key facts

Mode of study
Distance Learning
Method of study

This course requires you to manage your workload independently, and will involve attendance at a campus or centre - often for assessment purposes only.

Subject area

Entry requirements

Candidates should possess a basic knowledge and understanding of combinational logic. This may be evidenced by the possession of the HN Unit Combinational Logic or NQ Units E9S3 11 Combinational Logic; E9SG 12 Sequential Logic; E9SB 12 Logic Families and Digital System Analysis (or an appropriate equivalent).

What you will need

Students are responsible for securing any unit resources listed.

What you need to know

Additional costs

This course involves an additional SQA fee. Please see our Courses Explained page for further information on costs.

Anything else?

Please note that fee waivers may apply. Find out more about funding for part-time courses.

Next steps




This course requires some attendance at College, often for assessment purposes only. Please enquire about expectations for your specific course when booking.

Attendance is usually at the Aberdeen City Campus or Fraserburgh Campus.

Pre-entry guidance is required prior to booking a place on this course. Please contact Distance Learning Co-ordinators Sheena Thomson or Susan Smith by email, or phone 01346 586136 in the first instance for more information. When submitting your distance learning application form, please ensure you attach the additional information sheet listing qualifications and previous knowledge with your application. You may be required to attend College for assessment. Please check if this is a requirement for your course.

Duration Fees* Code
40 Hours over 6 Months £125.00
Paper applications only

Paper applications

You must submit a paper application form and additional information form for this course and return them to us completed and signed.

Completed forms should be returned to the following freepost address:

The Student Information & Admissions Manager
North East Scotland College
Aberdeen City Campus

Should you have any problems with your application, please contact the Student Advice Centre:

Telephone: 01224 612330

If you take up a place on a College course, at the start of the course you will be asked to sign an enrolment form. In signing the form and/or taking up a place on a College course, you will enter into a contract with the College and be bound by the North East Scotland College Standard Terms and Conditions of Study. Copies of the Terms and Conditions are available for inspection on notice boards and at various locations throughout the College, at the College Reception, on the College website:, or can be obtained on request from the Student Funding and Admissions Manager, North East Scotland College, Aberdeen City Campus, Gallowgate, Aberdeen AB25 1BN. Please note that courses are offered subject to (a) there being sufficient numbers of enrolments and (b) the availability of resources. The College reserves its right (i) not to run courses where the number of students is considered insufficient or where resources are unavailable and (ii) in certain circumstances, to refuse admission to an individual applicant.