Nam tristique porta ligula, vel viverra sem eleifend nec. Nulla sed purus augue, eu euismod tellus. Nam mattis eros nec mi sagittis sagittis. Vestibulum suscipit cursus bibendum. Integer at justo eget sem auctor auctor eget vitae arcu. Nam tempor malesuada porttitor. Nulla quis dignissim ipsum. Aliquam pulvinar iaculis justo, sit amet interdum sem hendrerit vitae. Vivamus vel erat tortor. Nulla facilisi. In nulla quam, lacinia eu aliquam ac, aliquam in nisl.
In cursus faucibus tortor eu vestibulum. Ut eget turpis ac justo porta varius. Donec vel felis ante, ac vehicula ipsum. Quisque sed diam metus. Quisque eget leo sit amet erat varius rutrum vitae dapibus lectus. Vivamus et sapien ante. Suspendisse potenti. Fusce in tellus est, ac consequat lacus. Nulla risus massa, commodo in imperdiet ut, ornare in leo. Duis pellentesque sagittis lorem, sed mollis lorem venenatis id.Red Light Emitting Diodes (LED) replaces HID lamps in street lighting system to include dimming feature. A microcontroller of 8051 family is used to control the intensity by developing pulse width modulated signals that drives a MOSFET to switch the LEDs according to achieve desired operation. In the present system, mostly the lightning up of highways is done through High Intensity Discharge lamps (HID), whose energy consumption is high. Its intensity cannot be controlled according to the requirement so there is a need to switch on to an alternative method of lightning system i.e., by using LEDs. This system is build to overcome the present day drawbacks of HID lamps. This system demonstrates the usage of the LED’s (light emitting diodes) as the light source and its variable intensity control, according to the requirement. LED’s consume less power and its life time is more, as compared to the conventional HID lamps. The more important and interesting feature is its intensity can be controlled according to the requirement during non peack hours which is not feasible in HID lamps. A cluster of LEDs are used to form a street light. The microcontroller contains programmable instructions which controls the intensity of lights based on the PWM (Pulse width modulation) signals generated. The intensity of lights are kept high during the peak hours, as the traffic on the roads tend to decrease slowly in the late nights, the intensity also decreases progressively till morning. Final it completely shuts down at morning 6, and again resumes at 6pm in the evening. The process is repeated. This concept in future can be enhanced by integrating it with the solar panel, which converts the solar intensity into corresponding voltage, and this energy is used to feed up the highway lights.
- Microcontroller is used to control PWM
- MOSFET is switch to achieve desired operation
- This system is build to overcome of HID lamps
- TIP122 power transistor