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Light Auto Saver

LAS - 1


Light Auto Saver comes to rescue by offering an inexpensive, effective way to minimize lighting costs, by adjusting the illuminance of the lights and dimming lights in some cases. Our Light Auto Saver saves approximately 30% energy, thus reducing your electricity bills by drastic amounts.
Light Auto Saver uses Atmel ATTiny13 microcontroller, a high performance, low power, 8-bit Microcontroller, that offers the following main feature used in the project :
  • Expansion Connector of Load and Mains output.
  • Optocoupler used V138T.
  • TRIAC used BTA12-600B.
  • One 8-bit Timer/Counter with Prescaler
  • Two PWM Channels.
  • 4-channel, 10-bit ADC with Internal Voltage Reference.
  • 8-pin PDIP / SOIC: Six Programmable I/O Lines.
  • External interrupt source.
  • Power ON Reset.
Software Features
There are three operating modes in light auto saver.


Manual Mode :
The user will have to switch ON / OFF the light manually.


Semi-Automatic Mode :
Manual choice of reference illuminance level or moods :

  • Study Room For high illuminance level as required in a study room.
  • Living Room For moderate illuminance required in day-to-day living.
  • Night Lamp For low illuminance, to be used as a night lamp.
Fully Automatic mode : Automatic dimming light control (photocell controlled continuous dimming with 550 lux target illuminance). In this mode, the photocell detects the level of day-light illumination in room and adjusts the light intensity accordingly, thus saving a lot of energy.
A radical feature of this application is it saves approximately 30% energy, during while maintaining the same brightness level of a lighting device, thus reducing your electricity bills by drastic amounts.



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