A DIY “water clock” uses dyed liquid and bottle-based segments to draw each number, replacing timekeeping fluid with visual drive.
A “water clock” that doesn’t actually keep time? That kind of playful engineering is exactly what makes this latest build stand out, and the focus keyphrase—water clock digits—captures the real trick: the display looks like a timepiece, but the liquid is only there to power the visuals.
The project centers on an array of digits built from glass bottles. where each number is formed by a fifteen-segment display layout.. Instead of using standard electronics to light segments. dyed water is the driving force behind which portions of the digit appear. turning a familiar digital format into a hands-on. physical spectacle.
Rather than relying on a single simple reservoir. the setup uses a stepper-driven peristaltic pump along with membrane-pump boosters to fill the bottles on demand.. As needed. the system adds dyed water into the bottle segments so the digit “renders” through what’s effectively a liquid-covered/empty segment effect.
Once the display has served its purpose. emptying is handled in a surprisingly mechanical way: a servo dumps the water into a trough.. That choice avoids the need to intricately reverse the pumping process for each segment. but it also means the mechanism has a deliberately messy. real-world rhythm—liquid goes where it’s told. and gravity takes it from there.
The creators note that the bottle concept existed from the start. but one detail was revised during development: the bottles were originally intended to be used differently. before the approach was flipped.. The updated arrangement also came with a practical advantage.. Dumping the bottles rather than filling and draining them in careful sequence reduces the amount of pumping hardware required and helps prevent long delays that would otherwise come from filling and emptying segments one after another.
Getting the servo linkage to flip all nine bottles together took troubleshooting, according to the report.. In projects like this. the electronics may be the straightforward part. but the physical actuation—making multiple moving pieces behave reliably—tends to be where prototypes stall. iterate. and then finally click into place.
After a series of modifications. the 3D-printed mechanism reportedly worked as intended. producing digits that the builders consider worth the effort.. It’s a reminder of how DIY hardware engineering often evolves: the design changes not because the original plan was wrong. but because the constraints of real mechanisms demand new solutions.
The build also draws a comparison to an earlier “other kind of water clock” previously featured. one that used modern electronics alongside a more traditional framing.. Taken together. the message is clear: you can borrow the visual language of timekeeping while experimenting with entirely different ways to make the display respond.
If someone wanted to push the idea even further, the report suggests expansion toward a flip-dot style display—essentially taking the liquid-driven segmentation concept and scaling it into a different historical display aesthetic, but still using modern fabrication and control.
For viewers who prefer to see the build in motion, the project is shared alongside a video demonstration.. Watching it play out makes the approach easier to grasp: the digits form through staged water filling and servo-driven dumping. creating a clock-like output without relying on conventional lights or displays.
water clock digits glass bottle display segmented liquid display DIY electronics stepper peristaltic pump flip-dot style