Model No: 225 This rash driving warning system will come handy for the highway traffic police as it will not only provide a digital display in accordance with a vehicle’s speed but also sound an alarm if the vehicle exceeds the permissible speed for the highway. The system basically comprises two IR sensor pairs, which are installed oppositely on the highway. The time taken is determined by the 555 TIMERS and output is fed to the Decade Counter and displays the time on a 7-Segment Display taken by the vehicle in crossing the required distance from one pair to the other from which the speed of the vehicle can be calculated.
In case the vehicle speed crosses the limits a buzzer gives beeps to indicate that the vehicle has crossed the speed limit.
The power supply consists of a step down transformer 230/12V, which steps down the voltage to 12V AC. This is converted to DC using a Bridge rectifier. And it is then regulated to +12V using a voltage regulator 7812 which is required for the operation of the Decade counter, 555 Timer and other components. For more details visit www.efxkits.com or www.facebook.com/edgefx