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DAC to light bulb

Discussion in 'LEDs and Optoelectronics' started by jasontangth8, Feb 14, 2017.

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  1. jasontangth8

    jasontangth8

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    Feb 14, 2017
    Hi,

    Is there any component which can amplifier the current but the output voltage follows the input voltage?

    Application : DAC -> ( ) -> light bulb

    As I know the DAC cannot provide enough current to light up a bulb. Therefore, is there any component can amplifier the current but the output voltage follows the input voltage?

    Thank you
     
  2. davenn

    davenn Moderator

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    Sep 5, 2009
    so you want the light globe to vary in brightness dependant on the output of the DAC ?
     
  3. jasontangth8

    jasontangth8

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    0
    Feb 14, 2017
    Yes, the brightness of the bulb control by the output of the DAC
     
  4. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    You would need an amplifier. This is going to be horribly inefficient, however.
    Use PWM instead. See here for a list of information for dimming lamps using PWM.
     
    hevans1944 likes this.
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