automotive lighting

Discussion in 'The Projects Forum' started by C mundt, Mar 19, 2016.

  1. C mundt

    Thread Starter New Member

    Mar 19, 2016
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    So I have a couple things I want to do, one is install a PMW to my LED markers and running lights.

    The other is how to make my marker light dim or turn off when turn signal is on?
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
    745
    For pwm one method is to use a 555 timer and mosfet transistor, are the marker lights indicators?
     
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  3. C mundt

    Thread Starter New Member

    Mar 19, 2016
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    Markers are the ones that wrap around the corner aka parking or indicator lights.
     
  4. BR-549

    Well-Known Member

    Sep 22, 2013
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    388
    Is a marker light a running light? Are they separate circuits?

    Please define all your different "light" terms.

    A labeled photograph would help.

    "Markers are the ones that wrap around the corner aka parking or indicator lights."

    So a marker is the same as indicator lights also????
     
  5. C mundt

    Thread Starter New Member

    Mar 19, 2016
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    Marker lights
     
  6. ian field

    Distinguished Member

    Oct 27, 2012
    4,415
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    PWM has limited range with a single 555, the "elegant solution" uses 2 - or a 556.

    A dual comparator can do the job with the same footprint as a single 555 - but it doesn't match the output capability.

    A class-D audio chip might have the output capability to drive a bulb directly, but it could take a bit of searching datasheets to identify a chip that will tolerate the alternative use.
     
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