I made my own clock using an 'air pressure driven display'.
The YouTube channel soiboi soft has created a display that uses air pressure to move a silicon film and display information.
The following are the basic parts of a silicon display. When air is removed from the 3D printed part covered in silicon, the center indents, displaying a single line.
Soiboi Soft uses '1' to represent a dented state and '0' to represent an undented state.
Because the sealed state is maintained until air pressure is applied, the state is preserved even after the input signal is removed. Using these characteristics, soiboi soft created a clock.
This is what the overall design looks like. By combining the parts, you can display numbers using a 7-segment display, and if you line up four of the same parts, you get a digital clock.
This is what's inside.
The air valve acts as a transistor, sending either 1 or 0 information to the silicon film.
There are four air valves, corresponding to the numerical display area. The central dot area is also provided separately.
An internal microcontroller controls the air valves and selects which data to write to which digit.
The display can be updated every second, and in addition to telling time, it can also be used as a stopwatch or timer. It can also display letters in the shape of the alphabet.
Because it can maintain its state using air pressure, soiboi soft describes this device as 'pseudo-RAM.' Although it doesn't have the functionality to access memory, it can be accessed by human eye, so it becomes RAM including the observer, they explained.
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