Sherasiya Akaram ID NO 09EC04 Shukla Dhaval ID NO 09EC67 Department of Electronics amp Communication Shankersinh Vaghela Bapu Institute Of ID: 802772
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Traffic Light ControlPREPARED BY:Sherasiya Akaram (ID NO: 09EC04) Shukla Dhaval (ID NO: 09EC67)
Department of Electronics & CommunicationShankersinh Vaghela Bapu Institute Of Technology,Vasan.
Slide2INTRODUCTIONOne way traffic light controllers having three signal Red, Green and Yellow To ensure that suitable traffic signals are provided to reduce accidents and improve conditions for public transport
Slide3Signal To Stop Signal to Proceed With Caution Signal To Go-Ahead
Slide4How Traffic Light Control Work ?The circuit based around 555 Timer IC (Astable mode) + 4017B Johnson counter The 555 astable circuit provides clock pulses for the 4017 counter which has ten outputs (Q0 to Q9)the sequence of the traffic lights is spread over 10 clock pulses
Slide5Slide6PART LIST IC1. NE555 2. 4017BSEMICONDUCTOR LIST1. D1 TO D6: 1N41482. L1,L2,L3 : LED
Slide7RESISTOR LIST1. 3*01 K OHM2. 1*10 K OHM3. 2*22 K OHM4. 1*100 K OHMCAPACITOR47 µF0.01 µF6.8 nF
Slide8MISCELLANEOUS1. 16 pin IC socket2. 08 pin IC socket3. Battery snap4. 2 pin battery connecter
Slide9CIRCUIT DIAGRAM
Slide10WORKING OF CIRCUITThe 555 timer IC is connected for Astable Operation, the clock pulses are fed to the 4017 IC via the 10K resistor. The 4017 is a 10 stage counter, therefore the sequence of the traffic lights is spread over 10 clock pulses, 4on red, 1 on red & amber, 4 on green and 1 on amber
Slide11Each output becomes high in turn as the clock pulses are received. Appropriate outputs are combined with diodes to supply the amber and green LEDs. The red LED is connected to the ÷10 output which is high for the first 5 counts (Q0-Q4 high), this saves using 5 diodes for red and simplifies the circuit.
Slide12OBSERVATION TABLE4017 COUNTER HIGHREDYELLOWGREENQ0 and ÷10OnQ1 and ÷10OnQ2 and ÷10
OnQ3 and ÷10On
Q4 and ÷10
On
On
On
Q5
On
Q6
On
Q7
On
Q8
On
Q9
On
Slide13APPLICATIONControl the flow of trafficReduce the risk of accidents
Slide14REFERENCEwww.clarkson-uk.comwww.rshelectronics.co.uk