Colour Sequence Detector

Design of A Colour Sequence Detector for a 5-core Harness Cable

Low-cost tester for verifying the colour sequence and continuity of 5-core harness cables at both ends of a wire roll.

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📜 Overview

This device verifies that both ends of a cable have the same wire color sequence and ensures continuity.

It was developed in 2019 as a more efficient alternative to the manual continuity tester used by the Harness Department at Cable Solutions (Pvt) Ltd.

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⚙️ How It Works

1. A 555 Timer generates clock pulses.
2. Two CD4017 Decade Counters are clocked together:
   • One drives the positive side of LEDs.
   • The other (through a NOT gate) drives the negative side.
3. When the wire order matches at both ends, the corresponding LED lights up.

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💡 Features

• Tests 5 cores (expandable to 10 for a single CD4017).
• Detects sequence and continuity.
• No microcontroller → reduced cost.
• Powered via 9V battery.
• Tested via Proteus 8 Professional simulation and breadboard prototype.

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🛠 Components

• 1 × 555 Timer IC
• 2 × CD4017 Decade Counter IC
• 5 × NOT Gate IC (each per core)
• 5 x LEDs (each per core)
• 5 x Resistors (each per core)
• Jumper Wires, Breadboard
• 9 V Battery

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📷 Project Images

Simulation (Proteus 8 Professional):

Breadboard Prototype:

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🔮 Future Improvements

• Expand to test up to 10 cores.
• Build into a durable production-line-ready enclosure.

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🛠 Tools & Software Used

• Simulation Software: Proteus 8 Professional

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📄 License

This project is shared for educational purposes. Please give credit if you use it.

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📬 Contact

If you have feedback or suggestions, feel free to open an issue.

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