FreeTad’s Awesome Darkroom Timer
Printables
6 model
Free
FreeDarkroom Test Strip Device for Linear + F-Stop Printing
Printables
FreeDarkroom F Stop Printing Timer Enclosure and Control Panel
Printables
FreeDarkroom timer (Arduino/ Github project)
Printables
FreeAdvanced Darkroom F-stop Timer
Printables
FreeControl box for B's Original film Processor
Printables