Design of black box for moving vehicle warning system

The project presented here shows the design of black box for warning system in moving vehicle exceeding speed limits. This system consists of three main parts, namely speed sensor, micro controller and alarm system. The main function of the black box is to monitor vehicle speed and it gives a warning when the speed limit is exceeded. It can be installed in any type of motor vehicle and does not affect the operation of the vehicle after its installation. The input to the black box is same vehicle speed signal (VSS) used by the vehicle speedometer. The system has been designed using Maxplus-II software and programmable logic device (PLD). The whole black box system is developed and it is tested using signal generator in laboratory. Since the system is designed with digital logic and is based on programmable logic device, the output of the black box responds quickly with the change in input signal.