this is the metal detector robot project done on kathmandu university Nepal.for any queries mail to bajagainsadan@gmail.com

1. Final Project Presentation on
The Metal Detector
Robot
By:
Atul Jha
Pujan Shrestha
Aadarsha Bajagain
Nishan Thapa

2. Concept Development
Image source: Movie - Mine

3. Introduction
• A robotic vehicle that can sense metals ahead of it on its path
• Consists of a LC circuit that uses the principle of
electromagnetic induction
• Whenever the metal is present in front of the detector, there
is a change in the frequency of the coil
• Using the frequency fluctuations between current in the
circuit, the metal is detected and sound in the buzzer is
produced to indicate the detection
• Vehicle is controlled by smart phone
• The direction is changed remotely via smart phone using
Bluetooth as communication interface

4. Objectives
• To implement technology in mines.
• To detect metals in remote areas.
• To implement this technology in security system.
• To attain uniqueness in the design.

5. Components Used
• Ardunio uno
• HC-05 Bluetooth Module
• LM339
• Motor driver
• Robot Car Chassis Set

6. Implementations
Fig. Block Diagram of the System

7. Flow chart

8. Schematic Diagram
Fig. Schematic Diagram of the System

9. Power Consumption
• Main power supply 9V
• Motor * 2 = 3V
• Bluetooth Module 3.3V
• Secondary power supply 5V(Metal Detector Circuit)

10. Conclusion
• Successfully developed a metal detector robot
• Attained basic knowledge on different steps in circuit
manufacturing such as circuit testing and debugging,
soldering components, PCB designing and manufacture
• Achieved knowledge on bluetooth serial communication,
Microcontroller operating mechanism, operation of
decoder and shift registers etc.

11. Limitations
• The range of inductor is very short
• The bluetooth works for short distance

12. Future plans
• The system can be made for greater power
• Efficiency can be increased
• Camera implementation in the robot can be
done
• Ultrasound sensor for obstacle detection
• Note: this is just the prototype version

13. Thank you!
Any Queries?