Photoresistor LED dimmer circuit

Discussion in 'Embedded Systems and Microcontrollers' started by unox, Jul 17, 2012.

  1. unox

    Thread Starter New Member

    Jul 16, 2012
    Hello everyone!

    i'm very new to electronics & i've no basic knowledge on it ..
    Hope that everyone here will guide me through my project.
    Thanks everyone in advance!

    Basically this is how my project goes..

    >> Light sensor (photoresistor) that can automatically adjust the light intensity based on the ambient lighting, which will turn down the lights if a significant amount of sunlight is entering the room, and turn up the lights when there is little sunlight entering the room. The user will also be able to switch to manual control, and adjust the light intensity with a dimmer switch to the desired level.

    pls contribute some ideas for my project ..
    Thanks! :)
  2. ActivePower


    Mar 15, 2012
    You could sample the ADC input from the photoresistor and adjust the duty cycle of the LED accordingly to change the brightness?