javier_cardona

8 ms·

1.
Show HN: Factitio.us – Generate authoritative links to put arguments to rest(factitio.us)
3 points by javier_cardona 1y ago|0 comments
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by javier_cardona 2y ago
I lost access to the slides half way through reading them... Too bad! I was enjoying the presentation! (“Rust makes me feel guilty” :) EDIT: Never mind. Access came back. Good slides!
3.
by javier_cardona 2y 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.
4.
by javier_cardona 2y 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-...
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by javier_cardona 3y 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 mon
6.
Haxophone crowdfunding campaign has launched(crowdsupply.com)
5 points by javier_cardona 3y ago|2 comments
7.
by javier_cardona 3y 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!
8.
by javier_cardona 4y 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 availab
9.
by javier_cardona 4y 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/a
10.
by javier_cardona 4y 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 )
11.
by javier_cardona 4y ago
FWIW, I just tried it on iPhone and works for me...
12.
by javier_cardona 4y 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&#
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by javier_cardona 4y 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.
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by javier_cardona 4y 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
15.
Show HN: Haxophone(github.com)
526 points by javier_cardona 4y ago|71 comments
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by javier_cardona 5y ago
A preprint of the paper mentioned in the post is available here: https://www.researchgate.net/publication/347609399_Mechanica...
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by javier_cardona 10y ago
SEEKING FREELANCER - San Francisco, CA. Remote OK We are looking for help to layout our prototype printed circuit boards (PCBs). Requirements: - Experience laying out multi-layer PCBs, with RF (cellular), audio and other digital signals (SP
18.
by javier_cardona 10y ago
SEEKING FREELANCER - San Francisco, CA. Remote OK We are looking for help to layout our prototype printed circuit boards (PCBs). Requirements: - Experience laying out multi-layer PCBs, with RF (cellular), audio and other digital signals (