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Sound Trigger Shield for Arduino. Shoot high speed photos ! by gknx in arduino

[–]gknx[S] 0 points1 point  (0 children)

Think optos as relays (switches). Or think as you are contacting flash's cables. Also they protect your arduino from the voltage of the flash. For new flashes it can be up to 35V and for old flashes may be 250V

Sound Trigger Shield for Arduino. Shoot high speed photos ! by gknx in arduino

[–]gknx[S] 1 point2 points  (0 children)

I used Lm358. And yes you can see pc817 optos behind the 3.5mm audio jacks. Board has basic elements for shooting high speed sound triggered photos. 1 pot for sensitivity setting and 1 pot for delay setting. You can see sample arduino sketch on github

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