Tweets
Replying to @PantsSlide, @MicrochipMakes and @oshpark
Low power Feather board with a smol LCD screen :)
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Replying to @tomfleet, @roteno, @sulfuroid, @lilygo9 and @RAKwireless
god tests me every day 🙃
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Replying to @pdp7
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rooftop beer weather; feels like we’re approaching the other side. 📷 @M_uh_lee
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Replying to @ElectronVillage and @oshpark
naw, the custom LCD, I’m waiting on for a bit; don’t want to blow up the scope for v1. The purpose of this board is to be a playground for working with the SAML22, so this is a more standard LCD. https://www.digikey.com/en/products/detail/OD-372/2544-OD-372-ND/12089318
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Replying to @josecastillo
also HUH. Just realized my footprint for this chip has the wrong size thermal pad. Not a ‘mistake’ per se, but i could’ve shrunk that down and made my life way easier by routing signals underneath. if I ever make this again, it might be worth doing; my routing was a bit janky 🙃
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Replying to @oshpark
Once again, the super swift service blows me away with its speed: ordered on one Friday, delivered the next Friday. The things we can do.
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Beginneth the weekend project: assembling this thing. Designed and printed these little bezel pieces to hold the LCD in place last night; while the screen won’t arrive til Monday, it seems at first glance like a reasonable starting point.
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Replying to @TrentonEmory
and fox news will be crowing all day about how cuomo’s a creep while ignoring credible allegations against madison cawthorn or (god forbid) the former president. It’s asymmetric outrage; one party wants accountability for both parties, but both parties want accountability for one
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Replying to @josecastillo
like, you know someone, then time passes and you’re catching up and suddenly you find they inhabit this completely incomprehensible gibberish world that looks like ours, but is filled with arcane rituals and stories full of nonsense words. but they seem really passionate about it
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cryptocurrency LARPers remind me a lot of QAnon LARPers.
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Replying to @joshu
see, you’ll know that you authentically own that patch of skin, and that it’s totally not a scam designed to separate you from your money, because it’s on the blockchain. or, something.
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Shenzhen, Bellevue, Portland and Thief River Falls. I love it when a plan comes together.
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Replying to @m03da
heh I was thinking in the direction of a world clock, trying to fit Shenzhen into four characters.
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how they think they look / how they actually look
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RT @RickRab: hoarding boxes of these since the year 2000 https://twitter.com/presentcorrect/status/1369300578493423619
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the battery in the watch I’m hacking on holds 0.23 watt hours of energy, and I’m trying to make it last a year or more. meanwhile, in the last 15 days, blockchain people have burned 229,000 watt hours of energy trading this picture of a square doggo. wtf? http://cryptoart.wtf/#https://superrare.co/artwork-v2/-19824
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Replying to @gennyble
I also like gifs, but used to justify living with video files by imagining the energy saved by sending fewer bytes and spinning fewer disks. of course now people are burning all the coal in Appalachia to mint imaginary tokens in the cloud, so I don’t know what to think anymore.
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Replying to @matseng
This would be muxed, 6x21. It would use zebra strip because the board I’m designing is for an existing wristwatch, and it already comes with a zebra strip and bezel that holds everything in place; trying to reuse as many parts as I can.
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Replying to @JoakimVa
Soon! Waiting on rev 2 boards to come in before I share the design, and need to collect documentation and make it make sense. But if you search “from:@josecastillo watch” on Twitter and sort by latest, I’ve been sharing scattered updates on here. https://mobile.twitter.com/josecastillo/status/1348474279952855044
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Replying to @josecastillo
this is the font I’m using for the 7- and 14-segment characters; the author is @keshinomi_88pro. “Classic” in bold italic feels really clear and approachable, and the project uses an open font license! https://www.keshikan.net/fonts-e.html
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one last test on paper to close out the weekend. Not the worst first draft; icons need a little work, but all in all it fits and feels readable. (side note, this poor old wristwatch had no idea what was in store for it when I plucked it off of eBay 😬)
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RT @derekcaelin: Spent tonight getting started with @josecastillo’s Feather Wing. Gonna document my knuckle-dragging approach to soldering…
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Replying to @_nitz and @GregDavill
I am going to seriously look into this. I have all the measurements, I think the layout is realistic, and it’s a small enough piece of glass (~22x13 mm) that I suspect the cost might just be reasonable. of course i’ll share progress as I go :)
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life pro tip: do the work until the work is done.
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Replying to @dandelany
Possibly! I’ll say I was kinda brainstorming this as, y’know, what stuff could one put on an LCD that would make it useful for lots of different kinds of projects. Anyway, I’m stoked to see what you’re cooking up when it’s ready!
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Replying to @jgeorge and @travisgoodspeed
I’m just basing my info off of this Hackaday article; watching one of the linked videos, the designer said he wouldn’t even recommend one manufacturer in particular because there are so many out there. But I haven’t delved into the process myself (yet)! https://hackaday.com/2018/07/24/custom-lcd-module-is-unexpectedly-cheap-and-easy/
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Replying to @josecastillo
actually come to think of it, this could be a cool F-91W hack even without designing a custom board or getting stuck in firmware hell. Just design an LCD that matches the F-91W’s pinout and digit layout, but make it, like, cyberpunk. (I need to post my notes on this bit)
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Replying to @ChengduLittleA
According to this article, someone got 5 samples made for $138. But that includes all the one-time costs; I would imagine it gets cheaper from there. I think maybe there are just a lot of LCD manufacturers, which maybe drives down the cost? https://hackaday.com/2018/07/24/custom-lcd-module-is-unexpectedly-cheap-and-easy/
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ok getting WAY ahead of myself, but last night discovered it’s surprisingly inexpensive to design a custom LCD. Threw this together in Photoshop. It’s 126 segments. I could make it the exact shape & size of the F-91W’s LCD, and drive it with the same 27 pins I’m already using. 🧐
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Replying to @SophiKravitz
I was gonna link to the Hackaday post but didn’t want to be too obvious :) https://hackaday.com/2018/07/24/custom-lcd-module-is-unexpectedly-cheap-and-easy/
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had a really interesting realization tonight that has OF COURSE nerd-sniped me into a completely wild exercise in putting the cart before the horse.
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Replying to @dandelany
story of my life :)
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Replying to @dandelany
Hmm, I’m wondering if you could abuse the LCD controller to get away with 2 common and 32 segments; assign one com to the first screen and the other to the second. You’d need to use the 100-pin N-variant to have enough LCD pins, which is either TQFP (doable) or 0.5mm BGA (oh no).
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Replying to @dandelany
Steal away! The watch project borrows heavily from projects by several open source hardware makers. Sharing ideas is the thing we do :)
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Replying to @gennyble
yea it’s pretty wild, I’m running the green LED through a 10K resistor; when it blinks, it’s crazy to see my power usage jump fifty-fold, all the way up to… 0.6 mA
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Replying to @gennyble
I measured 10-14µA (depending on operating voltage) with the SAM L22 and the LCD from a Casio watch. There’ll be some overhead from the LDO in this design — the watch runs direct from a coin cell — but with some optimizations, I think it’s a totally reasonable target.
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Replying to @josecastillo
this is just a one-off to satisfy my needs in development, but with some more work I think it could be a cool gadget for low power projects. The SAML22 can get down to ~10µA while keeping an LCD going. (this is the LCD; still TBD how I’m going to mount it) https://www.digikey.com/en/products/detail/orient-display/OD-372/12089318
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watch update: realized my pace developing for the SAM L22 has been slowed by the fact that I have to debug one-handed while holding pogo pins. so I designed a Feather. Could I have just bought an Xplained board? Sure. But it would’ve been $60 and besides, where’s the fun in that?
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ok so I tweeted this last night but it’s still weirding me out: this is a visualization of an actual neuron from a ML model. Like, it triggers on this abstract set of inputs: stubby legs, yellow hair, one hand aflame, the other lobbing a Molotov cocktail. https://microscope.openai.com/models/contrastive_4x/image_block_4_5_Add_6_0/89
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Replying to @tomfleet
It looks like the remains of a Cronenberg monster that’s been gibbed by a hand grenade.
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Replying to @josecastillo
How I see myself How my computer sees me
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Replying to @josecastillo
have we stopped lately to consider whether our pocket gargantubrains are doing alright? because this is the kind of shit they’re being forced to hallucinate every time we unlock our phones. these grotesque visualizations are giving me some i-have-no-mouth-and-i-must-scream vibes.
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Replying to @josecastillo
I have found the trump neuron. amazingly it seems to fire on both the asshole’s face, and the asshole’s name. https://microscope.openai.com/models/contrastive_4x/image_block_4_5_Add_6_0/89
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Replying to @tomfleet
I think it’s using that same technique, but applying it to individual neurons to see what stimuli make it fire. it also shows some real images that seem to trigger it, so these seem to be the neurons for “shocked,” “hand,” “tongue,” and… “dinner?” Really? https://microscope.openai.com/models/contrastive_4x/image_block_4_5_Add_6_0/317
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wow ok so apparently there’s a tool that can let you stare into the abyssal depth of a machine learning models’ actual neurons. Do androids dream of electric sheep? LOL no, apparently they dream of this goddamn nightmare fuel, all night, every night. https://microscope.openai.com/models/contrastive_4x/image_block_4_5_Add_6_0/2478
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Machine learning, folks! https://twitter.com/moyix/status/1367575109305794563
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I’m no expert but that first landing looked solid. the second one, less so? you can tell by the way it’s landing.
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Replying to @techrecount and @alexsotodev
I’d be stoked to offer up any notes or ideas that might be helpful, but tbh that sounds more ambitious than the kinds of projects I’m working on right now, which are smaller, microcontroller-driven designs. Something like a laptop is likely beyond my ability. A great idea though!
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RT @mntmn: clarification: i’m not saying ur art is stupid, but putting it on a blockchain is
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