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DAC to light bulb

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

Feb 14, 2017 #1

jasontangth8

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0

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
Feb 14, 2017 #2

davenn Moderator

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1,875

Sep 5, 2009

jasontangth8 said:

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?
Click to expand...

so you want the light globe to vary in brightness dependant on the output of the DAC ?
Feb 14, 2017 #3

jasontangth8

2

0

Feb 14, 2017

davenn said:

so you want the light globe to vary in brightness dependant on the output of the DAC ?
Click to expand...

Yes, the brightness of the bulb control by the output of the DAC
Feb 14, 2017 #4

Harald Kapp Moderator Moderator

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2,144

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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