The Darkroom Cookbook Forum

I know this is probably a zombie thread at this point, but in case the OP or anyone else is still tuned in ... In anticipation of my own Zone VI dev timer going bad (it hasn't yet!), I designed and built my own replacement - this should be well within the skills of an electronics hobbyist to build o...

I built a temperature controlled darkroom timer some years ago and faced this problem. You'll find a spreadsheet on the git repo that calculates these factors a number of different ways: https://gitbucket.tundraware.com/tundra/devtimer I used a couple of theoretical mathematical models as well as ac...