For those who remember my work back in the days with implementing an intervalometer for Nikon cameras (yes, in spite of it being rather simple to implement in the camera firmware itself, these larger brands prefer to classify such a feature as premium and make it available only in more expensive DSLRs), I have detailed in the following post, the solution that I have put together:
https://www.creationfactory.co/2012/03/timelapse-intervalometer-technology.html
