Tri-level sync reader to drive LED light array

hi guys!

i looking tech-art video project. have arduino uno, blackmagic ursa mini 4k camera, 4 led light panels, blackmagic sync generator , couple of sdi bnc cables.

we trying synchronize 4 led lights flash 1 after another, in sequence, , expose 1 frame video each. video captured @ 120 frames per second. trying use sync generator keep camera , arduino in sync. have attached gif made illustrate trying achieve.


with friendly engineer have made circuit allows arduino power lights. simple code makes lights flash in sequence @ rate can define:

code: [select]

/* simple program sequentially turn on , turn off 4 leds */

int led1 = 13;
int led2 = 12;
int led3 = 11;
int led4 = 10;
int delay = 8.3333;

void setup() {
   pinmode(led1, output);
   pinmode(led2, output);
   pinmode(led3, output);
   pinmode(led4, output);
}


void loop() {
  digitalwrite(led1, high);    // turn on led1
  delay(delay);                  // wait delay time
  digitalwrite(led1, low);     // turn off led1
  digitalwrite(led2, high);    // turn on led2
  delay(delay);                  // wait delay time      
  digitalwrite(led2, low);    // turn off led2
  digitalwrite(led3, high);    // turn on led3
  delay(delay);                  // wait delay time
  digitalwrite(led3, low);     // turn off led3
  digitalwrite(led4, high);     // turn on led4
  delay(delay);                  // wait delay time
  digitalwrite(led4, low);     // turn off led4
}

we have found this forum post outlines how read time-code xlr input. unsure if post helpful code need. have contacted blackmagic design information tri-level sync , how sync generator works , told me not allowed release information how product works, however, have sent 2 pdfs have attached post.

we trying work out how read tri-level sync pulse sync generator make drive lights @ same rate camera shutter. appreciated.

kind regards,
felix

you need separate sync comparator , feed composite sync low pass filter extract vertical sync portion. signal needs filtered , edge detected.

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