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hey shapespeare, I am very new to all this. It is my first time using an arduino. I have assembled everything ok and can run the stepper motor with the controls you set up. However, I have not been able to get the ir led to get my camera to fire. I have a nikon d3400 and have set up everything accordong to your fritzing skematic(im pretty sure) but couldn't even get it to light up a normal led. Could you offer any advice? Thanks