1. MISSILE DETECTION BY ULTRASONIC MEANS AND ACTIVATE THE DESTROYER BY BANDAPALLY MAHESH (08PQ1A0419) MIRYALA SAI KUMAR (08PQ1A0441) UPPADI AYYAPPA (08PQ1A0404 )

2. Introduction Ultrasonic proximity detector can be used in defense for detecting the missile and to activate the destroyer Ultrasonic proximity detector comprising AC powered transmitter and receiver sections make use of a pair of matched ultrasonic transducers operating at around 40 kHz each.

3. What is Embedded system? An Embedded System is a combination of computer hardware and software. An embedded system is a microcontroller- based, software driven, reliable, real-time control system, autonomous, or human or network interactive.

4. Block Diagram of the project

6. TRANSFORMER Transformers convert AC electricity from one voltage to another with a little loss of power. Step-up transformers increase voltage, step-down transformers reduce voltage Most power supplies use a step-down transformer to reduce the dangerously high voltage to a safer low voltage.

7. Bridge Rectifier The Bridge rectifier is a circuit, which converts an ac voltage to dc voltage using both half cycles of the input ac voltage. A bridge rectifier is used because of its merits like good stability and full wave rectification and TUF factor also high in bridge rectifier

8. 555 Timer The 555 timer operates in three operating modes

9. The operating modes of 555 timer has monostable,astable,bistable. In this project 555 timer is used in astable mode because of the continuous triggering. The 555 can operate as an oscillatoroscillator

10. Ultrasonic Transmitter and Receiver Ultrasonic Transducer Transmitter and Receiver Pair is very useful in making various sensors for detecting obstacles and measuring distances.

11. Micro controller

12. AT89S52 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. The AT89S52 provides the following standard features: 8K bytes of Flash, 256 bytes of RAM, 32 I/O lines.

13. Liquid crystal display An 8051 program must interact with the outside world using input and output devices. One of the most common output devices attached to an 8051 is an LCD display

14. Relay A relay is an electrical switch that opens and closes under the control of another electrical circuit. A relay is able to control an output circuit of higher power than the input circuit, it can be considered to be a form of an electrical amplifier.

15. Applications Defense Aero space Sub marines Railways

16. conclusion By using ultrasonic waves we can detect the missile than micro controller activate the destroyer

17. Bibliography www.atmel.com www.beyondlogic.org www.wikipedia.org www.howstuffworks.com www.alldatasheets.com