A Security System Using Ultrasound has been proposed in this project. This project was implemented for a low cost security system. In this project the ultrasonic sensors were used to detect the moving object in small place. An ultrasonic transmitter was used which generated and transmitted a 40 KHz signal and an ultrasonic receiver was used which received this transmitted signal which is reflected from any object. A two stage amplifier and a comparator were used to amplify the received weak signal and compare with a reference voltage (5.5V). The comparator s output (High or Low) was fed to a microcontroller which decided whether to start alarm or not respectively. A buzzer was used to generate an alarm. We tested our project and successfully detected the object within 3 feet. The success rate was above 80%. With proper installation this Security System Using Ultrasound can be used where security break warning is needed.
Your patient Cavity Sam is feeling a bit under the weather. Can you "operate" and make him better, or will you get the buzzer? Grab the tweezers and try with all of your might to take out all of his funny ailments. Can you help him with his pulled muscle or the frog in his throat? Operate with your steadiest hand, but don't forget to steer clear of the sides and avoid lighting the light! Operation and all related characters are trademarks of Hasbro. Includes gameboard, tweezers, 13 plastic ailments (including rubber band) and instructions. Features: - Classic Operation game challenges you to remove parts without setting off the buzzer - 13 plastic Ailments parts - Nose lights up when you touch the sides - Remove the most parts to win WARNING: CHOKING HAZARD - Small parts. Not for children under 3 years. Ages 6 and up. For 1 or more players. Requires 2 "AA" batteries (not included).