The objective of this system is to detect object that will be ahead of ultrasonic transducer. This application is very useful in areas like monitoring and also very useful in wild life photography.
The ultrasonic module is interfaced to the microcontroller of 8051 family. Signal is transmitted whenever an object approaches near the ultrasonic module, which then transmits a signal which is reflected by the object and thus is received by the module itself. The ultrasonic receiver sends back the signal to the microcontroller which is actuates the output to take the necessary action.
Future enhancement can be done to this project by interfacing a GSM modem, so that SMS is sent to the user by the controller whenever an object is detected.