Tags: checker , detect , driving , highways , projects , speed While driving on highways, drivers should not exceed the maximum speed limit permitted for their vehicle. The make up of these highways, sometimes leads to accidents because most of the times, there is no rule to govern speed limits on these highways. To overcome this problem, we have implemented a circuit called as a speed checker for highways. By taking all these considerations in mind, we have designed a highway- speed checker circuit to detect the rash driving by using different electronic components such as timer, counter, logic gates , microcontroller, seven segment display and all other components. A Speed Checker to Detect Rash Driving on Highways Using a Timer Nowadays, in our daily life most of the accidents occur due to rash driving on highways which may lead to the loss of many lives. Therefore, to overcome this problem, the following project implements a speed checker to detect rash driving on highways by using a timer.

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The counter advances by one count at the positive clock signal transition. The carry-out Cout signal from CD provides one clock after every ten clock inputs to clock the succeeding decade counter in a multidecade counting chain. This is achieved by connecting pin 5 of each CD to pin 1 of the next CD A high reset signal clears the decade counter to its zero count.

Capacitor C12 and resistor R14 generate the power-on-reset signal. The above circuit shows the power supply. The AC mains is stepped down by transformer X1 to deliver the secondary output of 15 volts, mA. The transformer output is rectified by a bridge rectifier comprising diodes D3 through D6, filtered by capacitor C14 and regulated by IC11 to provide regulated 12V supply.

Capacitor C15 bypasses any ripple in the regulated output. In mobile application of the circuit, where mains V AC is not available, it is advisable to use an external 12V battery. Speed checker construction and working Assemble the circuit on a PCB. An actual-size, single-side PCB layout for the speed checker and its component layout is shown below.

Install the two laser transmitters such as laser torches on the other side of the highway exactly opposite to the LDRs such that laser light falls directly on the LDRs. The output of IC1 goes high for the time set to cross metres with the selected speed 60 kmph and LED1 glows during for period. When the vehicle crosses the second laser light, the output of IC2 goes high and LED2 glows for this period. Piezobuzzer PZ1 sounds an alarm if the vehicle crosses the distance between the laser set-ups at more than the selected speed lesser period than preset period.

The counter starts counting when the first laser beam is intercepted and stops when the second laser beam is intercepted. The time taken by the vehicle to cross both the laser beams is displayed on the 7-segment display.

Reset the circuit for monitoring the speed of the next vehicle. This speed checker can check the speed of only one vehicle at a time.


Projects on Speed Checker To Detect Rash Driving On Highways

WhatsApp Advertisement While driving on highways, motorists should not exceed the maximum speed limit permitted for their vehicle. However, accidents keep occurring due to speed violations since the drivers tend to ignore their speedometers. The system basically comprises two laser transmitter-LDR sensor pairs, which are installed on the highway metres apart, with the transmitter and the LDR sensor of each pair on the opposite sides of the road. The installation of lasers and LDRs is shown in Fig. The system displays the time taken by the vehicle in crossing this m distance from one pair to the other with a resolution of 0.


Speed Checker for Highways




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