riskeyboard70

-- Kicad 6 footprints and libraries for making analog keyboard PCBs (using Void Switches) https://github.com/riskable/void_switch_65_pct -- Kicad 6 Source files for a tutorial I'm working on, "How to design an analog keyboard". Want to see what an analog keyboard PCB looks like? Look here! ...and I have early alpha firmware written in Rust that runs on stm32f4x1 microcontrollers (like the Black Pill) here: https://github.com/riskable/riskeyboard70 (it's not quite ready for prime time but at least serves to demonstrate the analog multiplexer logic). So far the keyboards I've made using my Void Switches have been made so that the whole top comes off: https://gfycat.com/costlyglaringhyracotherium This makes it super easy to clean your keyboard (which is a complaint I hear regularly about 3D printed keycaps... That they collect bacteria in the layer lines or whatever): https://gfycat.com/unconsciousvigilantkinglet ...and here's some other gifs of the keyboards/macro pads/numpads I've made demonstrating various features I've incorporated into their designs: https://gfycat.com/silentgorgeoushydatidtapeworm (macro pad with analog hall effect rotary encoder--it's knob comes up with the rest of the top plate yet) https://gfycat.com/scrawnyglisteningandeancat -- Numpad with PLA everything (I normally print everything in PETG so it's an example that yes, you can use PLA) https://gfycat.com/carefulangrybirdofparadise -- Very fancy Keycap Playground keycap https://gfycat.com/fewcomplicatedhuia -- What could be the most historically-significant keyboard accessory of the 21st century https://gfycat.com/marriedtediousaquaticleech -- All my PCBs so far have incorporated an infrared receiver so you can turn any old remote control into a wireless macro pad (got extra GPIO pins so why not? haha) https://gfycat.com/firsthanduniformeasteuropeanshepherd -- Simple glamour shot of my Riskeyboard 70 with all LEDs set to white. I've been typing on my 3D printed Void Switches for about 9 months now (on various keyboard prototypes). My Riskeyboard 70 is my "daily driver" as it were. EDIT: I almost forgot: I wrote a rust crate using `embedded-hal` that makes working with 74HC4067 (and 74HC4051) analog multiplexers super easy (important for making analog keyboards): https://github.com/riskable/analog-multiplexer

2000, your actuation threshold is 250, and your release threshold is 50 a keypress would work like this: * Physical key is pressed and as it moves down the length of travel the mV reading from the sensor changes (goes up or down depending on the pole of the magnet). * Once the difference from the resting value is greater than the actuation threshold (250) that's considered a keypress. At this point the sensor would be reading 1750 (the point of actuation). * If the user kept the key pressed exactly at the point of actuation there's a chance that the keypress could "bounce" because the mV value goes up and down ("voltage wobble") on its own depending on the noise on the PCB and in the environment. * The user releases the key and once the mV reading goes above 1750+*<release_threshold>* (1750+50) the key is considered released and a keyrelease event is sent. My keyboard uses an STM32F401CEU6 running at 84MHz. The ADC runs at half that (42MHz) and is setup to read all 72 sensors (70 keys + an analog rotary encoder built into the PCB) in 0.160ms. It does this every millisecond to meet the USB spec's 1000Hz polling rate. I assume the other analog keyboards feature similar methods and would have greatly reduce latency over traditional mechanical keyboards. For reference (only) I have uploaded the Riskeyboard 70 firmware to github if you're curious to see how it all works (it's written in Rust): https://github.com/riskable/riskeyboard70/ The keyboard uses 3D printed Void Switches (my magnetic separation design). Chyrosran22 did a teardown video recently going over the switches and their parametric nature here: https://youtu.be/H_Ym9528awM