Nowadays everybody can recognize the huge increasing of car numbers on roads. Day after day, this increasing may be an indicator for changing and development. This put a lot of challenges on people and governments. One of these challenges is car accidents and there bad effects. The main aim of our proposal is to help our society to decrease car accidents by designing a system which makes the drivers pay more attention and worn them before an accident takes place. The designed system consists basically of three general circuits, which complete each others. The first circuit consists of microcontroller, power source, speaker and switches needed. The second circuit, the ultrasonic transmitter and receiver circuit which measures the distance between the car and any thing in front of it. Finally, the third circuit, the opto-coupler circuit, its function to determine the current speed of the car. The characteristics of this system include flexibility and effectiveness of implementation. It’s cheap and it has low power consumption with a small size. The system records all the changes surrounded the driver environment, then process them using a fuzzy microcontroller which worn the driver of expected dangers through an output devices which lead the driver to take all necessary measures to avoid the accident

The strategy this work follows as to achieve its goal, is to put a very first stone in the way of making a USB peripheral. This is done by developing a USB I/O main-board that features some properties usually known of development board; however, this main-board is best identified as an I/O board as it remains in the final product (i.e. it is employed by the final USB peripheral), this identification, called the main-board's description. The main-board developed as a moderate number of sub-circuits that achieve several functions, the choice of connectors used to plug LEDs, switches and daughterboard.