Motion Sensor Light using IR Proximity Sensor & CD4017 IC

An automatic motion-activated lighting system using digital logic circuits

The British University in Egypt | Faculty of Informatics & Computer Science Module: Electronics and Digital Circuits (25CSCI10C) | Year: 1 (Post-Preparatory)

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👥 Team Members

Team A14T4

Student ID	Name	Email
257678	Mahmoud Samir Moustafa	mahmoud257678@bue.edu.eg
251551	Youssef Wael Fawzy	youssef251551@bue.edu.eg
257403	Ziad Mostafa Gaber	ziad257403@bue.edu.eg
258948	Ziad Ayman	ziad258948@bue.edu.eg
244144	Ahmed Ali Abdelmotjal	ahmed244144@bue.edu.eg

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📑 Contents

• Project Overview
• Features
• Components Required
• Circuit Diagram
• Simulation
• Repository Structure
• Documentation
• Notes

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📌 Project Overview

This project implements an automatic motion sensor light that detects movement using an IR (Infrared) proximity sensor and controls a lighting system through digital logic circuits. The design utilizes the CD4017 decade counter IC as the main control unit, eliminating the need for microcontrollers or programming.

Key Highlights

• 🔍 Contactless Detection: Uses IR technology to detect motion/obstacles
• 🎛️ Pure Hardware Solution: No programming or microcontroller required
• ⚡ Relay-Based Control: Can switch AC/DC loads safely
• 💡 Energy Efficient: Automatic on/off based on motion detection
• 📚 Educational Value: Demonstrates fundamental digital electronics concepts

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✨ Features

Feature	Description
Motion Detection	IR sensor detects objects within 2-30 cm range
Automatic Control	Light turns ON when motion detected, OFF when clear
Visual Indicators	Red LED (standby) and Green LED (active) status
Load Control	9V relay controls 6V lamp or other compatible loads
Low Power	Operates on 9V battery for portability
No Coding	Pure hardware implementation using logic ICs

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🔧 Components Required

Main Components

Component	Quantity	Specification	Purpose
IR Obstacle Sensor	1	IR obstacle/proximity module	Motion detection
CD4017 IC	1	Decade Counter	Logic control
BC557 Transistor	1	PNP	Signal switching
BC547 Transistor	1	NPN	Relay driver
Relay	1	9V SPDT	Load switching
LED (Red)	1	5mm	Status indicator
LED (Green)	1	5mm	Status indicator
Diode	1	1N4007	Flyback protection

Passive Components

Component	Value	Quantity
Resistor	10kΩ	1
Resistor	4.7kΩ	1
Resistor	220Ω	3
Capacitor	100nF	2
Capacitor	1pF	1

Power & Load

Component	Specification
Power Supply	9V Battery
Load	6V Lamp/Bulb

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📐 Circuit Diagram

Figure 1: Complete circuit schematic showing IR sensor, CD4017 IC, and relay control

Circuit Sections

1. Sensor Module: IR transmitter/receiver pair
2. Control Logic: CD4017 decade counter with clock input
3. Driver Stage: BC557/BC547 transistor configuration
4. Output Stage: Relay with flyback diode protection
5. Power Supply: 9V regulated supply with decoupling capacitors

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🔬 Simulation

The circuit was simulated in Proteus before being built on a breadboard. The simulation sources are in proteus/.

File	What it is
proteus/Proteus Project File.pdsprj	The Proteus design — open this
proteus/Proteus Project File.pdsprj.workspace	Proteus layout/workspace state for the design
proteus/infrared-sensor-library/	IR sensor model used by the design (.LIB, .HEX, .IDX + a .DSN demo)

The IR sensor is not a stock Proteus part, so a third-party library is bundled in proteus/infrared-sensor-library/. Keep those four files together and with their original names — Proteus resolves .LIB/.HEX/.IDX by name. To use it, load the library in Proteus' Library Manager first, then open the .pdsprj.

Simulation capture

Light active — motion detected, load energised	Standby — no motion, load off

▶ Watch the simulation recording (MP4)

Figure 2: Simulation log

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📁 Repository Structure

Motion-Sensor-Light-CD4017/
├── README.md
├── docs/                          submitted written work
│   ├── A14T4-project-proposal.docx
│   ├── A14T4-final-report.docx
│   └── A14T4-circuit-working-report.pdf
├── media/                         images and the simulation recording
│   ├── schematic-diagram.jpg
│   ├── proteus-move-1.png
│   ├── proteus-move-2.png
│   ├── proteus-non-played.png
│   ├── proteus-played.png
│   ├── simulation-log.png
│   └── simulation.mp4
└── proteus/                       simulation sources
    ├── Proteus Project File.pdsprj
    ├── Proteus Project File.pdsprj.workspace
    └── infrared-sensor-library/
        ├── Infrared Sensor Simulation.DSN
        ├── InfraredSensorsTEP.HEX
        ├── InfraredSensorsTEP.IDX
        └── InfraredSensorsTEP.LIB

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📄 Documentation

Document	Contents
docs/A14T4-project-proposal.docx	The accepted proposal and initial work plan
docs/A14T4-final-report.docx	Full project report
docs/A14T4-circuit-working-report.pdf	Circuit working evidence

GitHub cannot preview Word files — use the Download button on those links.

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📝 Notes

• Sensor naming. The component list previously read "HC-SR501 or similar". The HC-SR501 is a PIR module — a different sensing principle from the IR obstacle/proximity module this project is built around, so the entry now reads generically. If you know the exact module used, put the part number back here.
• No source code. This is a pure digital-logic design; the only files that can be "run" are the Proteus simulation, and Proteus itself is required.
• Repository size. media/simulation.mp4 is ~12 MB and dominates the repo. It is a genuine deliverable, but if the repo is ever cloned widely, hosting it as a GitHub Release asset would be the better home.