A Digital Clock Displays Numbers by Deflating Silicone Membranes
A digital clock displays numbers by using air pressure to deform silicone membranes. Removing air from a 3D-printed segment creates a visible line, and multiple segments form digits. Valves control the display, which can update once per second.
The creator, the YouTube channel soiboi soft, built the air-powered display to retain its state through air pressure. It can also show timers and stopwatch readings.
Instead of simply lighting up a digit, this clock pumps air to reshape silicone. Every passing second calls for a little pneumatic construction job.