Meet the BeamTrigger.

A remote trigger for Nikon cameras, that works with an IR blaster.

Supported models include all models with the regular IR support, which you can easily spot on your camera with the little (5mm) black dot on the front side of the right hand grip on the camera body.

Materials list:

• 16mm push button
• Seeduino Nano (which you will need to desolder the pins from)
• 5mm IR LED (kinda like this, I took mine from an old remote)
• 4x M3x20mm Bolts
• 4x M3 nuts

Download the models on Thingiverse!