A project on automatic traffic control

GUIDED BY : A.M.VORA

PRESENTED BY :BABARIYA JASMIN H. (146030309002)BORAD PARTH V. (146030309014)ANAND RAJ N. (146030309125)GAMI JAYESH G. (146030309514)

The function of traffic lights is to provide sophisticated control and co-ordination to ensure that traffic moves as smoothly and safely as possible.

Function

History of Traffic light

The world's very first traffic lights were invented by J P Knight installed near London's Hothe intersection of George and Bridge Street use of Commons, which was on, in 1868.

In 1914 The American Traffic Signal Company installed red and green traffic lights on every corner of the intersection of 105th Street and Euclid Avenue in Cleveland, Ohio. First traffic lights were all controlled by either timing, or manually switched

The free left turn condition is provided

throughout the entire signal period.

The control can also be exercised manual when desired.

Features of Traffic light

Block Diagram

IC 555&

IC 4017 TRAFFIC LIGHT

9 V DC SUPPLY

Circuit Diagram

1. IC 555 IC 555 provide time delay in circuit and also work as oscillator.

2. IC 4017 It takes clock signal from the clock input and turn on the 10 output in sequence , each time when it receives clock input pulses.

Component and Description

3. Register 330E : A movable metal is rotated in clockwise or anticlockwise direction that changes the resistance of preset

4. Capacitor It is used to temporarily store electrical energy in an electric field.

5. Diode IN4007 This is a simple, very common rectifier diode, and used for reverse voltage protection.

6. LED It is a two-led semiconductor  light source.

IC 555Pin 1 (Ground): Function of Pin 1 is to ground.

Pin 2 (Trigger): Pin 2 detects rail voltage and gives output very high, when Pin 6 is low.

Pin 3 (Output): Pin 3 goes High and Low and deliver up to 200Ma

Pin 4 (Reset): Pin 4 works to reset the chip.

Pin 5 (Control): Pin 5 is use to control circuit IC4017.

Pin Description

Pin 6 (Threshold): Pin 6 detects rail voltage and gives output very low , when Pin 2 is High.

Pin 7 (Discharge): Pin 7 goes low when Pin 6 detects rail voltage and Pin 7 remains low only. While Pin 7 not goes high.

Pin 8 (Supply): Connects to the positive power supply (Vs). This can be any voltage between 5V DC.

IC4017Pin-1: It is the output 5. It goes high when the counter reads 5 counts.

Pin-2: It is the output 1. It goes high when the counter reads 0 counts.

Pin-3: It is the output 0. It goes high when the counter reads 0 counts.

Pin-4: It is the output 2. It goes high when the counter reads 2 counts.

Pin-5: It is the output 6. It goes high when the counter reads 6 counts.

Pin-6: It is the output 7. It goes high when the counter reads 7 counts.

Pin-7: It is the output 3. It goes high when the counter reads 3 counts.

Pin-8: It is the Ground pin which should be connected to a LOW voltage (0V)

Pin-9: It is the output 8. It goes high when the counter reads 8 counts.

Pin-10: It is the output 4. It goes high when the counter reads 4 counts.

.

Pin-11: It is the output 9. It goes high when the counter reads 9 counts.

Pin-13: Pin 13 is connected to ground and it has logic LOW voltage.

Pin-14: This pin is the clock input. This is the pin from where we need to give the input clock pulses to the IC in order to advance the count. The count advances on the rising edge of the clock.

Pin-15: This is the reset pin which should be kept LOW for normal operation. If you need to reset the IC, then you can connect this pin to HIGH voltage.

Pin-16: This is the power supply pin. This should be given a HIGH voltage of 5V for the IC to function.

Working IC 555 and counter IC 4017 are used in this circuit.

When the supply is given to the circuit, the gate pulse is generated.

The gate pulse is then given to counter IC 4017 in Pin CP0.

In this circuit IC 555 is work as monostable multivibrator.

It can be produced by adding register and a capacitor to the connected to the basic

timer IC.

Output (Vout is taken from pin 3.)

Pin 2 are shorted and connected to the ground.

Pin 6 and 7 is connected to +VCC through a variable register and between pin 6

and 7 register RB is connected.

Supply is connected to MR in counter to start.

When the clock pulse is not given to the circuit, it will not conduct.

Gate pulse is given through output of the IC 555 and given to the pin

CP0.

Then the counter will conduct.

Then the output is taken from Q0, Q1, Q2, Q3…………Q9.

CP1 is grounded.

When the logic level is 1 at Q0 then Q1, Q2, Q3 are at logic level 0

then also the output of Q1, Q2, Q3 are conduit because all the Q0 to

Q3 is connected parallel with diode.

At that time other output Q4 to Q9 all are at logic level 0.

Provide for orderly movement of traffic Increase capacity at intersection Reduce frequency and severity of certain kind of clashes Provide continuous movement of traffic at a desired speed Interrupt heavy traffic to allow pedestrians to pass Effectively perform traffic management

Advantage

Disadvantage

Increase in AccidentsDelayDiverted CongestionCivil Disobedience

APPLICATION

Bridge Construction 2-Lane Road Construction Power Outage Downed Signal Replacement Utility Work Bridge Painting Culvert installation Event Traffic Control Natural Disaster Traffic Control Tree trimming Heavy equipment traffic organization Emergency Response

SNAP SHOT OF OUR PROJECT

SNAP SHOT OF OUR PROJECT