11–20 of 28 posts
They use infrared and they are also analog. You can bind different event based on the actuation force you put on the switch.
There's no per-switch sensor at all!
Instead, each key-press just results in one wide metal bar being hit. And to figure out which key was pressed, there's a sensor on the right and the left side which are used to calculate what key was pressed based on how long it took for the signal (i.e. vibration in the bar) to reach the left and right sensor.
It's so clever and so ridiculous at the same time!
[1] Video presentation (Talk about acoustic switches starts at 1:46:00): https://youtu.be/AvszDsr1js8?t=6361
[2] Slides: https://docs.google.com/presentation/d/1jfWpf8cABnH54yVjPIU3...
Interesting! I'm curious how this would sound on a built board compared to the other unique mechanical switches out there.
Sound is determined by the springs and mechanical action. This design could potentially be made silent. More interestingly, it could give you pressure-sensitive switches ...
A flip-flop would work to convert the analog to 1-bit digital, but you could also tweak the magnetics and with a better ADC get velocity measurements! Add some software and you can type ANGRY MESSAGES by just pounding on your keyboard, no shift/cruise control needed!
A flip-flop would work to convert the analog to 1-bit digital, but you could also tweak the magnetics and with a better ADC get velocity measurements! Add some software and you can type ANGRY MESSAGES by just pounding on your keyboard, no shift/cruise control needed!
https://oldcomputers.net/compucolor-8001.html
had a keyboard that was optical, it ran beams of light through masks attached to the keys, and looked at the beam interruptions as keys were pressed.
The keyboarding experience was absolutely miserable; you had to COMPLETELY release a key before pressing another. Ghosting and mangled keystrokes were almost impossible to avoid. I'd rather type on a card punch than one of those . . . well, no. But it's darned close.
Slightly more readable version: https://threadreaderapp.com/thread/1260688848104771586.html
Shocked Twitter has chosen to make their reading experience even worse. Now I get linked to a tweet thread, Twitter knows it's a tweet thread of one user but what does it choose to show? Just the single tweet, a small "Show this thread" link and then 5 random other tweets from other people not connected or related to this tweet at all.
These are linear sensors that work by measuring the output of a transformer with a movable core. They have a reputation for being extremely reliable, even under harsh conditions. Therefore they are commonly used in aircraft, turbines, nuclear reactors, etc...
[1] https://en.wikipedia.org/wiki/Linear_variable_differential_t...