ΔStop 100 Timer Faceplate

This laser cut and printed faceplate is what makes the ΔStop 100 so striking looking. Do you want to build your own ΔStop 100? You can 3D print most of it, order or fabricate the PCB yourself, but the faceplate is trickier to make without specialized equipment. That problem is solved because now you can buy this component separately.

ΔStop 100 is a dedicated enlarger timer that uses logarithmic, f-stop based timing instead of linear seconds. You set a base exposure in stops and every click changes exposure by a fixed fraction of a stop, so the math stays the same no matter the print size or paper type. That means faster test strips, clearer intent with every change, and less guesswork when a print needs a tiny nudge instead of a full second.

It behaves the way photographers already think: exposure as stops, not time. The interface is focused on repeatable decisions, so you can move from test to final with confidence and keep a consistent record of the choices that got you there.