Led light controlled by dmx 512

Discussion in 'Embedded Systems and Microcontrollers' started by charles01, Nov 17, 2009.

  1. charles01

    Thread Starter New Member

    Nov 17, 2009
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    I AM DOING A PROJECT FOR A LIGHT WITH HIGH BRIGHTNESS LEDs CONTROLLED FROM A DMX 512 PROTOCOL BUT NOW I CANNOT GET THE DMX 512 DECODER CHIP TO CHANGE THE SIGNAL TO A SUITABLE FORMAT FOR MY 8051 MICROCONTROLLER SO I CAN CONTROL RED, GREEN AND YELLOW LEDS TO GIVE VARIOUS COLOURS
     
  2. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
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    Post a schematic.
     
  3. bertus

    Administrator

    Apr 5, 2008
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  4. rjenkins

    AAC Fanatic!

    Nov 6, 2005
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    DMX512 is basically a burst of serial data, with each byte being the value for one of the (up to) 512 channels.

    Just feed the DMX512 signal to an RS422 receiver IC and then into a serial port on your CPU.

    Count and dump the bytes/channels to the base channel for your controller then use the values of the next three bytes as control values for the Red/Green/Blue LEDs using PWM.
     
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