javier_cardona
Joined 11 years ago
Karma
359
Submissions
18
Member since
May 21
Recent submissions
Comment · 1 year ago
Comment · 2 years ago
For those interested in novel and quirky uses of e-ink displays, you might also want to see these: https://lightnote.cardonabits.com
Disclaimer: I design and build these. And I'm also a big fan of jonahss work.
Comment · 2 years ago
Pawn promotion is set to queen. You might want to add support for other promotions... https://www.chess.com/forum/view/game-showcase/checkmate-by-...
Comment · 2 years ago
Just for context, the quoted manifesto was originally written in French (https://monoskop.org/images/3/3b/Dada_3_Dec_1918.pdf). In that version, that particular sentence is gender neutral: "tout le monde fait son art a sa façon".
I would say that that their updated quote is a more accurate translation of the original than the English translation they initially used.
Comment · 3 years ago
After warm encouragement from this community (the Show HN post made it to #1 for a day!) I've decided to launch a crowdfunding campaign for fully-assembled haxophones. Wish me luck!
Comment · 3 years ago
Getting the electronics to work on such a tight energy budget is a big challenge, very impressive!
I've worked on a similar concept using a bistable display and a supercap for energy storage to recharge very quickly when sun is available. This is for more zen-like use cases, like chess puzzles: https://lightnote.cardonabits.com/products/lightnote-chess-e...
Comment · 4 years ago
No the reed does not vibrate. It's there to restrict the airflow and to provide a similar embouchure to a real sax. Some more details here: https://github.com/jcard0na/haxo-hw/blob/main/docs/assembly....
Comment · 4 years ago
It's running vanilla Raspberry Pi OS, alsa drivers and fluidsynth, all configured from the main Rust application (https://github.com/jcard0na/haxo-rs/blob/main/src/synth.rs)
Comment · 4 years ago
FWIW, I just tried it on iPhone and works for me...
Comment · 4 years ago
Actually the pressure sensor is on the PCB. Pressure is transferred from the mouthpiece through a flexible silicon pipe. You can see the details in the assembly instructions here: https://github.com/jcard0na/haxo-hw/blob/main/docs/assembly....
Comment · 4 years ago
Yes, there is no analog touch sensitivity on the sax: keys are either open or closed. The pressure sensor is for volume and note attack.
Comment · 4 years ago
The sounds are synthed sounds (I used fluidsynth) and the haxophone just uses the sound pressure to infer velocity of the notes.
The mouthpiece is optional: you can blow on the neck of the device and will get the exact same sound. But as a sax player, I really prefer to use it with a mouthpiece blowing through it but without making the reed vibrate (so no sound). I find that it helps me maintain proper embouchure and feels more comfortable. And after a solid practice session, I still get that gratifying tingling lower lip feeling.
Thanks for the feedback!
https://github.com/jcard0na/haxo-hw/blob/main/docs/assembly....
EDIT: Never mind. Access came back. Good slides!