Hey guys,
I was reading here for a while and finally joined because I wanted to give you my documentation on how to get your CHDK-camera triggered by Radian.
If you're not familiar with Radian have a look here.
http://radian.alpinelaboratories.com/Radian is basically a programmable device that lets you slowly turn your camera in timelapse shots. Like a better egg-timer. ;-)
But it also has a 2,5" triggering-port for DSLRs.
My goal was to get my S95 camera triggered by Radian. There are already several infos on how to build yourself a cable release and specifically for the S-series its a little bit harder with that awkward combined USB/Video Port. In the end I only had to make the connection from the cable release to the Radian.
Here is my documentation:
https://dl.dropboxusercontent.com/u/35226956/HowTo_CHDKenabled_triggered_by_Radian.pdfI'd be glad if that helps you too. :-)