![]() The types of sensors used can vary by location and technology. Rather than timers, “smart” or “intelligent” sensor-based traffic signals rely upon a system of sensors to detect when vehicles are present. The most common traffic lights work on simple timers. ![]() If a small amount of current flows from emitter to base, then a large amount of current can flow from emitter to collector. In a modern streetlight, a small circuit replaces the bird and turns the light on when the amount of light falls below a certain threshold. The entire process can be done by a using a sensor namely LDR (light dependent resistor). Generally, street light controlling system is a simple concept which uses a transistor to turn ON in the night time and turn OFF during the day time. ![]() Control signal generated by pic microcontroller is used to turn on transistor which in turn energize the relay coil and relay turn on the street light. Control signal is generated with the help of pic16f877a microcontroller after analyzing amount of light. Light sensor is used to detect intensity of light. How does a microprocessor controlled street light work? 7 How are street lights connected to each other?.6 How does a street light control system work?.4 Where is the sensor on a street light?.3 How are sensors used in street lamps?.1 How does a microprocessor controlled street light work?.
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