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im also trying to build a traffic light system. what are your requirements. are u going to use a microcontroller. at what scale the project is going to be. will it be a full scale system with big lights and stuff like that. do u want to include sensors.
there are lots of traffic light projects on the net (do a google on this). studying other peoples projects might help u in deciding what u want to build
im including sensor in my traffic light. but wat the approperiate sensor to use think of ultrasonc sensor. regarding led i haven got the time to check it out at the electronic shop. s wat ur suggestion.?
u can use PIR (passive infra red) sensors. if the thing is just going to be a scale model the sensor could also be a push button. but thats just too simple!!!!
ultrasonic sensors are good but that might be expensive and complex. plz tell me what is the project meant to do. is it a full scale project or just a science competition project.
for the indicating lights u can use bulbs or LEDs. for bulbs u will have to use triacs. the triacs will trigger the bulbs. but they will consume alot of power. so u should use LEDs. they dont consume much power and u wont need the triacs as well. try to find the cheapest LEDs u can get because u are gonna need lots of them if this is a full scale project
and one thing more, do u plan to use a count-down timer on the traffic lights too???
what will u be using for the control logic. have u used microcontrollers. doing this type of project with discrete components will be workable but a microcontroller based solution will be better
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