Using LED feedback on S100 for precision geo tagging

I am looking to gain more precision in my geo tagging using an LED for Feedback (CAM_FEEDBACK_PIN) on an S100. Does anybody have a circuit working for this? I have been given two different circuits from other sources, but not being an electrical engineer I don’t know which one is best suited to Pixhawk or how they work differently or which one is best to use. I have posted this in the facebook pixhawk 2 group and also on diydrones so am trying to find the best solution!

I used this: http://www.tuffwing.com/support/Install_a_canon_precision_geotag_cable.html
Works great, just follow their instructions. I should point out that my camera was an old SX230HS but it worked fine.

Yes I have seen it, but I would much prefer to DIY and learn as I go. Cheers though :slight_smile: