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Security system using stepper motor control and microcontroller

There are different types of security models in the present day world. A prototype of security model is considered in which stepper motor is controlled using micro controller. Stepper motor is only considered because of its advantages such as precise positioning and accurate placement. These can be controlled by using microprocessors but micro controllers have several advantages over microprocessors due to which it is considered for controlling of motor.

Though there are different types of stepper motors selection of motor is based on the application. Micro controllers produce very minute currents which are not sufficient to drive the stepper sufficient to drive the stepper motor, so a driver circuit is used namely ULN 2003 to amplify the current . ULN 2003 consists of 7 pairs of Darlington pair transistors which are used to amplify the current.

Sensors used for protection consists of transmitter and receiver and if any thing is obstructed between them signal will be given to the controller and stepper motor rotates to that side, by connecting a camera to the stepper motor the image can be monitored. This can be further extended and can be used in robotics which is the future of the world.

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