ArduinoMotion ControlProjects

Optocoupler for the Win

Just to prove that I haven’t been only playing video games, I humbly present to you a simple opto-isolator test circuit. This is the first step to remotely triggering my camera’s shutter remotely without putting it in any danger of a voltage spike from the rest of my motion control system and Arduino. The optocoupler is essentially a light-driven transistor with no physical link between the input and the output. The next step for me is to wire this up to the remote trigger port of my Nikon and code up a crude Arduino sketch to try it out. For that I’m using the 2.5mm TRS to accessory jack cable that came with my knockoff Nikon battery grip, a 2.5mm to 3.5mm TRS cable, and a 3.5mm TRS jack to make connect my trigger circuit to the camera. I could probably hack my actual remote trigger, but since I don’t have a spare I figured I’d do it the less-elegant, but nondestructive way.

One thought on “Optocoupler for the Win

  1. Hi,
    I’m new in electronics and i’m trying to create a motorized slider for my nikon D7100, to create timelapse sequences. But because my lack of knowledge, i’m running in circles. I’m looking for arduino Shoot/Move/Shot code that trigger the camera. Moreover, i’m looking to how do i protect the whole system (protect camera circuit…). It would be possible for you to share your code and circuit details? Sorry because my bad english.

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