Electronics and Communication · Digital Circuits
Design a digital clock from logic ICs
Build a clock with counters, decoders and seven-segment displays, no microcontroller.
- DifficultyAdvanced
- Estimated time2–4 weeks
- Budget₹500–₹1,000
- ClassCollege, years 1–3
- Team2–3 people
- You needBasic electronics
Prerequisites: None beyond your class work
Original · by TechnifyedEngineering DesignHardware ProjectHardware
Overview
Build a clock with counters, decoders and seven-segment displays, no microcontroller.
Skills you will use
Safety
- Use only batteries or a low-voltage supply (12 V or less). Never connect a project to a wall socket.
Materials and tools
- Counter and decoder ICs
- Seven-segment displays
- Timer IC or crystal oscillator
- Breadboards
- 5 V supply
Tools and software
Step-by-step roadmap
Start
You will finish with: a working clock and its logic diagram.
- 1
Prerequisites
Nothing special to know first. Then collect the 5 items in the materials list.
- 2
Learn
Read up on digital circuits: counters, logic, seven-segment display. Your textbook chapter and one short video are enough.
- 3
Plan
Sketch the design, list every part with its price and decide how you will know it works.
- 4
Build
- Generate a 1 Hz pulse.
- Build a seconds counter that resets at 60.
- Cascade it to minutes and hours.
- Decode each digit to a display.
- Add buttons to set the time.
- 5
Test
Run it ten times in a row. Note every failure, fix the cause and test again.
- 6
Document
Photograph each build stage, keep the circuit or drawing, and note what failed and how you fixed it. Report structure
- 7
Present
Demonstrate it working first, then explain how it works and what you would improve. Presentation structure
- 8
Publish
Share a short video, the parts list and the drawing or code so someone else can build it.
Expected outcome
A working clock and its logic diagram.
Other versions of this project
Advanced version
Add an alarm using comparators.
Research mode
Text marked "You write this" is a prompt for your own work; everything else is specific to this project.
- Research question
- You write thisOne question you can answer with data, narrow enough to finish in the time you have.
- Hypothesis
- You write thisWhat you expect to find, and why.
- Variables
- You write thisWhat you change or compare, what you measure, and what you hold constant.
- Methodology
- You write thisDescribe the method in enough detail that someone else could repeat it: sample, tools, procedure.
- Data collection
- You write thisSay what you will record, how many times, and how you will keep the records safe.
- Analysis
- You write thisChoose the table, chart or test that answers the question; report averages with their spread.
- Limitations
- You write thisList what could have affected the result: small sample, instrument limits, things you could not control.
Literature review
Find five to eight sources (your textbook, review articles, reports) and note what each says about your question. Group them by idea, not one after another, and end with what is still not known.
References
List every source you used in one style throughout (author, year, title, where it was published, link and the date you opened it).
Working as a team
2–3 people. Suggested roles:
Report and presentation
Report structure
- Title and aim
- The problem it solves
- How it works (principle)
- Parts list with cost
- Design: drawing, circuit or block diagram
- Build steps
- Testing and results
- Problems faced and fixes
- Limitations
- Future improvements
- References
Presentation structure
- The problem
- The idea
- How it works (one diagram)
- Parts and cost
- The build (photos)
- Live demo or video
- Test results
- What did not work
- Next version
Viva questions
Prepare your own answers to these before you present.
- What is the aim of your project, in one sentence?
- What is the principle behind it?
- Why did you choose these materials or tools?
- What result did you get, and was it what you expected?
- What went wrong and how did you fix it?
- How could this be improved or used in real life?
Resources
Source and attribution
Original
Written by Technifyed. Free to use for your own school or college project; write the report in your own words. Added 1 Oct 2026.
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