sketch for a traffic light 4 way
Couple of quick suggestions: in general the quality of answes you get (not just here, but everywhere) is almost always proportional to the care with which you ask the question. If you do a quick search of the site for 'traffic lights' then you can say, I've looked at projects ab and c, but they don't do 'x,. How do I do 'x'. You will also go a lot further to inspiring people to answer if you give a small amount of detail into what the project is for. I.e. something for a model train might be very different spec wise than a real working one.I.e. are you looking for a sketch of the way a 4 way traffic light looks? A rough sketch of how one works? A sketch of the circuitry that times and drives the lights? Or the circuitry that drives the lights with the sensors that detect cars. One that is also networked into a traffic control system? Or something else.Not trying to beat you up over this, but I see a lot of ultra brief question go unanswered b/c others have no idea what specifically the person is asking for.. ( my suspicion)
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Look for a graduation project for traffic signal from four directions with planned
If this is your graduation project YOU should be doing it. This included real research and experimentation. Try reading this and this
+1, Is the light itself 4 way or is the intersection 4 way with multiple lights?
Judging by previous questions the OP is building a A 'duino controlled traffic light system. BUT the question as it stands doesn't make much sense.