Finally got a few hours of time and put together an OS X app to act as a digital darkroom timer. Subscribe to see EXIF info for this image (if available) I tried several methods of control, including a cheap silicone rubber keyboard, but found this $35 RF presentation remote works best. Note the photo-chemical proof cover. Subscribe to see EXIF info for this image (if available) So far so good. Much preferable to some cheap timer that dies halfway through a development.