Abstract
The idea of the project is to install a microcontroller based circuit inside cars to control the speed as well as to transmit information about car as well as the driver. The project consists of a microcontroller based board that is to be placed inside the car and another (several) microcontroller based board(s) to be installed along the route.
The microcontroller based board inside the car will be equipped with a RF transmitter, RF receiver, DC motor driver, motors, keypad, etc. The RF transmitter is used to transmit information about car, its current speed and driver profile to the receivers present at checkpoints. The RF receiver is used to receive the checkpoint information from transmitters present at checkpoints, a display to denote current system status/speed. A buffer and driver are used to drive the DC motors. The speed of DC motors is controlled using PWM output at the pins of microcontroller. In case the car exceeds the speed limit posted by a check post, the microcontroller automatically decreases the speed down to specified maximum check post speed limit.
The microcontroller based board at the checkpoint will be equipped with a RF transmitter (to send the speed limit and check point information to RF receivers present inside cars), RF receiver (to receive driver, car, etc. information from transmitter present inside car), EEPROM to save a log of car speed limit and date/time of crossing, RTC to maintain date/time even in case of power loss, a display to denote system status. There can be several such checkpoints maintained at regular intervals.
