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very interesting(!)

Cool! I just saw your previous video and commented on it. You may be able to cut down on power consumption by powering each key's LEDs only when that key's sensors are being measured. I'm guessing you already have a loop in the code for doimg measurements one by one, so maybe adding a function to turn on the current key's LEDs wouldn't need too much extra code. Hope you post more about this project! The compliant keys are so innovative :)

Lots of great ideas in this project! And getting it actually working as a prototype is quite a feat imo. In case it's useful info, I built a matrix keyboard using a Teensy LC, which is slower than a Pico. It's able to measure 225 analog readings quickly enough for musical playing! I'm not much of a coder, but I'm hopeful you won't have trouble reading lots of inputs quickly. The only thing is that I've read that the Pico doesn't have great analog inputs, so I don't know how that might factor into the performance. Teensies have really good ADCs, fwiw.

so cool I love compliant engineering, 3d printing & synth ... this is awesome

I will definitely try to learn this. I love the game and have almost played through it❤

This is amazing! Congratulations! I've been looking for something like this since 2019, and yours is the best! Is it possible to build a keyboard with 5 octaves? Waiting for the project to be published! Here in Brazil, everything related to keyboards is expensive, and the entry-level equipment is not very high quality. As soon as you publish it, I'll build mine!

COULD YOU TELL ME THE CODE USED? I'M PRODUCING A PROJECT FOR COLLEGE SIMILAR TO YOURS, I WOULD LIKE TO SEE WHAT YOUR CODE IS USED ON THE ARDUINO.

Now to make it weighted ! Great video

awesome stuff :) I'm waiting for my 3d printer and eventually want to try and make my own Midi Piano Accordion, glad to see others trying to 3D print and make their own instruments :D looking forward to updates on your project great video

Pluh

WOW! I have been searching for a project like this for a long time and seems like I finally found it. This is amazing work :) Will this be open source?

Kris get the Banana.

Good one 💖!

It’s giving sackboy

I thought this was very cool and enjoyed seeing this at opensauce. Looking forward to seeing the next iteration and would be interested in building myself/learning more.

underrated song

capo chabon! buen video

Cool theme!

gonna miss this game

This, is FASCINATING, and I want one! 😍

Hey, I have also tinkered with some pi Picos on trying to do that. At first, I thought about a button matrix, but it wouldn't be velocity sensitive. Then, I saw a video online that tried to do that with hall effect sensors, but it was a bit expensive. Yours is a pretty cool and well built design, but, I still have a question, couldn't you have just used soft buttons instead of all that optical madness? There could be 2 buttons replacing the two phototransistors. I took this idea from a cross-section model I saw recently on my music centre of a thorman digital piano. I took a video about how it worked if you want it. I would love to share with you some of my ideas to try to make it as cheap, reliable and efficient as possible.

This is fascinating can i have a see on your source code

Hey! a bit of feedback here. I've serviced some MIDI keyboards and synths and the mechanism they use to measure the velocity of the keys is a lead in between two other leads, acting like a switch, I'll call center lead "c", top "t" and bottom "b". In an idle state the leads c and t are making contact, when the key is pressed the leads c and b are making contact, so the controller only measures the time it takes to change from "ct" state to "cb" state. This way the keybed consumes virtually no power. For examples search on google for "Yamaha DX7 Keybed" (a popular synthesizer) and look through them, I hope I did a good job explaining myself hehe.

This is so cool! If you do go the PCB route, you could design a motherboard with po-go pins and then have each key use the same PCB design and have contact pads on the underside, making a modular key setup. You'd just need to update the 3D model of each key module to position the identical boards. Also, to solve the power draw issue, you could look at using hall effect sensors and embed magnets into the keys. Or vice-versa.

I love how the flexture mechanism moves the pivot point of the keys. Years ago I made a organ pedal keyboard that used opto interrupters. Assuming you use a key scan method, you only need to light up one LED at a time. By using shutters that have 3 light levels: dark, half open, full open. You can easily implement key velocity. Just use a comparator circuit to convert the output of the foto transistors in a 2 bit signal. Have fun and good luck with your project.

now im in a idea a making one

I would be happy to help with: power consumption, and PCB design -

What a great project! Make it modular and you will have one of the best midi controllers possible!

I've kind of wanted to start playing around with thin film pressure sensors for computer keyboards, and testing it as a sound input device would be interesting too.

Hi, Im also going as a presentor at opensauce for my self playing midi instruments. See you there!

OMG thanks for the wintergatan melody and music box thingy! I love the style of your project updates, will be waiting for final build

My favourite song from Good & Evil.

rip lbp

Goodbye lbp. In hopes we meet again. .. please

What a great project, when are you going to publish the files? I would like to help you since I am working on a similar project for my school and when I found the video it helped me, but the files are not there, and I would like to share the idea that I have.

Great work! I would love to duplicate it.

I love your 3d printed keys as an alternative for hobby keyboard/synth projects. I mostly see mechanical switches from computer keyboards used in hobby projects which I am not a fan of for musical applications.

nice demo. Time or a pcb!

Man this is so awesome, I've been thinking about building out my own midi controller for a while now, adding the optical switches is interesting, I was thinking about using pots, but I guess that would get data heavy really quick

A compliant keyboard mechanism, love to see it!! Please work more on this project.

Awesome project! Glad you decided to share :)

That’s so cool! I’m impressed with the way you designed the keys to move when pressed, looks nice! Is there a specific reason you did not use a library for midi? I know there’s a midi library available for arduino.

I love your flexure keys! Have you considered hall effect sensors instead of optical? I bet you'd get a smoother, more predictable response.

Ooooh! I want to see the update and I want to collab on it. Do you have a git repo you can share?

cool ! I'd love to see what you'll do next

Amazing, thank you for sharing! Have been searching for “dyi velocity sensitive keyboard” over the last month and didn’t find anything until this popped up in my feed!

Super cool! Was there an existing library that let you find press speed from the sensors and convert it to MIDI velocity, or did you have to make some from scratch?

Very nice project ! I’d like to work on a simular midi keyboard too, so it’s a very useful resource! In particular the mechanical design is very bright and 3dprinter-friendly!

cool 👍

I'd love to see the journey!