Tweets
Replying to @jameswood
You’re in luck! Himawari-8 keeps watch over y’alls side of the globe :) https://himawari8.nict.go.jp/
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good-enough frame complete. now just waiting for my roommates to notice that it’s made of MAGIC.
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Replying to @ahzwawld
At the moment it’s still a DIY project, in two flavors: the easier-to-assemble E-Book Wing, and the more challenging Open Book. Details and design files here, plus links to order the PCB on Tindie (though I’m out of the wing at the moment) https://github.com/joeycastillo/The-Open-Book
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Replying to @mudlock
it would be overstating it to say i’m “designing my own ebook format”. Markdown is the format. this is just an intermediate representation, internal to the implementation of the typesetter.
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Replying to @josecastillo
incidentally, The 1619 Project has become my test case for this phase, which is all about the minimum viable software for viewing a diversity of content types (text, photos, maybe even audio). It’s also great; if you haven’t read it, you absolutely should: https://www.nytimes.com/interactive/2019/08/14/magazine/1619-america-slavery.html
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last night’s Open Book task: enabling text formatting (bold, italic, text size) in Open Book text files. Input format is plain markdown, but to make it easier on the device, I’m using Unicode noncharacters instead of HTML tags to format the text. good start; more to do this week.
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Replying to @AndrewVall
Sorry about that typo. The R5 on line 6 is a mistake; it should be R12. It’s fixed online. Basically:
R5: 1KΩ resistor
R12: 0.47Ω resistorhttps://github.com/joeycastillo/The-Open-Book/blob/master/Open%20Book%20Feather/1-click-bom.csv
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Replying to @Jaxter184
I gave each board its own 3.3v regulator; EN is the regulator’s enable pin, and they’re all tied together. My thinking is that it’s a way for the me to power cycle all the display modules at once (like if the I2C bus gets confused), or a way to just turn them all off.
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Replying to @josecastillo
(this, incidentally, is for a one-off sort of art piece that no one asked for, and which will probably annoy people once I install it in my window facing the JMZ. I dunno, sometimes you get an idea stuck in your head and you just have to let it out.)
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a couple months ago I said I wanted to drive an army of these classic 14-segment displays. Well, at last: meet the squad! (and the battalion!) The HT16K33 wasn’t the most original or daring answer to the prompt, but it’s cheap, and it gets the job done. Anyway, 3 down; 21 to go.
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I legit might buy a month of HBO just to watch this train wreck. https://twitter.com/axios/status/1289213904657084419
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Replying to @lukeweston
GOES posts new images every 10 minutes. I currently have it updating every half hour, just because the color e-paper refresh takes about a minute and change. I adore the idea of a big wall mount version! It’s like, no matter where you go, you are here; you were in this picture :)
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Replying to @michaelabuckley
I felt blown away by the present when @planetlabs was able to spot a mural on a city street the same day it was painted! https://twitter.com/planetlabs/status/1269046985119727616
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Replying to @krasnyydyavol, @MissingClara and @9600
alas I’ve been trying to do something similar on a SAMD51-based board of mine, and it’s a headache just decoding a JPEG, much less resizing it and adjusting color. Pi adds more complexity, but I think it’s worth it to have more memory and power, plus Pillow for image manipulation
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Replying to @MissingClara and @9600
I have not measured but I imagine it’s considerable :) I think the plan is to add a low power microcontroller board that powers up the pi once an hour for an update, and then shuts it back down right after.
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Replying to @bitshiftmask
Oh that is awesome! This could be a really fun board to play with Rust on actually – and I’ve also been wanting to learn embedded Rust as well. I’ll DM you when I have a chance to assemble a couple more, super interested :)
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Replying to @bitshiftmask
I might at some point! Would want to get board support and documentation much more put together though before I offered to sell them to folks :)
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Replying to @RaspberryPint
Cool build!! Yea the refresh on this one is quite slow, 15 seconds (but realistically 30 if you want to clear the screen first). Good for things that update only occasionally; GOES has new images every ten minutes, but I’m probably only going to update it once or twice an hour.
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it’s hard to overstate my excitement at having finally made this. Real-time blue marble imagery from GOES-East on color e-paper. I’ve been wanting to build a gadget like this for AGES. Now to make it battery powered and find a nice picture frame :) https://gist.github.com/joeycastillo/0a90f56681329729f3a56a95af4495ab
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Replying to @esports4losers
I can confirm that it looks pretty rad :)
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Replying to @kurisubrooks, @CommieGIR, @arturo182 and @Pebble
I think that was a Sharp memory display, like what the @playdate is using. It’s ultra low power like e-paper, but it’s technically still a LCD (I think?)
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Replying to @Ciph3rdoc, @Bartintosh, @digikey and @adafruit
It’s a @waveshare00 product, but they are unfortunately backordered right now through October. /cc @purringChaos who asked the same question https://www.waveshare.com/5.65inch-e-paper-module-f.htm
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Replying to @polprogpl
It’s decent at big areas of solid color, but a lot of photos I put on it tend to look a little washed out. Here’s SMPTE bars dithered to the 7 available colors, with pattern and diffusion methods, plus this test image of a baboon: http://sipi.usc.edu/database/database.php?volume=misc&image=10#top
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Replying to @cogliano
It also ends up being 15 seconds x2, because you really have to refresh it to white first or you get some ghosting. I’m using a Feather M0 which has room for an image hard-coded in flash, but I’ll probably end up using a raspberry pi for the project I have in mind :)
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Replying to @fredyfrolly and @ZxSpectROM
Yep! It’s the first color EPD I’ve seen available online. https://www.waveshare.com/5.65inch-e-paper-module-f.htm
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Replying to @AnachronistJohn and @ZxSpectROM
I wanted one of those so much back in the day! But I made the most of my TI-83+ in the end
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Let’s be realistic: cool new piece of e-paper tech comes out, the odds are 100% that I’m going to pick one up to hack on. The refresh is ever so slow, but the color is actually pretty impressive! also for the record, the image at the end is just a screenshot :)
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“Reading Mr. Bush’s 2000 acceptance speech at the [RNC] is like stumbling across a document from a lost civilization, with its calls for humility, service and compassion. That message couldn’t attract 20 percent in a Republican presidential primary today.” https://www.nytimes.com/2020/07/29/opinion/trump-republican-party-racism.html
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Replying to @josecastillo
if I’m being honest tho I’m also very excited that it’s super smol :) with batteries included it’s 1.5 inches in diameter and 0.3" thin.
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Replying to @josecastillo
why am I excited about sensor candle? It’s a very simple, very cheap board (minimal config is < $8 @ qty 1) with many options. SAMD11 RTC for an alarm, button for pressing, accelerometer to make a magic lantern that lights up when moved. Plus the 9-pin connector for more sensors!
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Replying to @josecastillo
sensor candle runs off a coin cell (2.4~3V), but in that configuration it can only drive low voltage LEDs. give it more juice (like 3 AA’s or USB power) and it can drive white LEDs too.
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Replying to @BrunnoDev
They interlock in a zigzag pattern; it’s basically a touch slider. You can see the pattern under the purple @oshpark solder mask😃
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Replying to @josecastillo
sensor candle concept + NTC thermistor. (these aren’t RGB LED’s; this is a different board where I used three different colors for status)
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sensor candle concept + capacitive moisture sensor
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It is happening here. https://twitter.com/tarahaelle/status/1288825671033200642
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let’s go to space https://www.youtube.com/watch?v=21X5lGlDOfg
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finally getting around to assembling long-put-off projects I packed back in Texas. m ore on this one tomorrow: the Sensor Candle Concept.
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Every American needs to unite to defeat these assholes come November. (that means you, mister “i-don’t-feel-like-either-party-represents-me” guy) https://twitter.com/joncoopertweets/status/1288266480547770368
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Instead they’re at the House of Representatives today, talking left-wing totalitarianism with the guy occupying Portland. https://twitter.com/RadioFreeTom/status/1288130262891732994
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Replying to @wakest
That is so awesome! Unfortunately I’m not selling fully assembled devices at this time; I’m only assembling them by hand at this point for testing, and each one takes too long for it to make sense. But I’ll let you know as soon as this changes!
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Replying to @M_uh_lee and @ConEdison
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Replying to @roboticvenusian
If you’re learning, I think doing a few through-hole projects might be a better start, but the E-Book FeatherWing could be a good project once you’re ready to take on surface mount soldering. This video gives a good intro to the techniques involved: https://youtu.be/QzoPxvIM2qE
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Replying to @RyanStansell
Good advice, thank you!
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Replying to @joshu
Brushed on, but it was like a stain + poly all-in-one (and I wouldn’t be surprised if I did an iffy job of it tbh)
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Replying to @joshu
I need to try that again; I did one in ⅛ plywood a while back, but the veneer started to chip really quickly. May just have needed another poly coat.
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discovered some… structural issues with the thin wooden Open Book enclosure, so it was an afternoon of laser cutting here. trying ⅛" acrylic this time, in clear, black and white. makes book feel a bit more chonky, but hopefully it stands up to being tossed around for longer.
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RT @anne_engineer: We are so close to 8,000 subscribers! Please consider a retweet so I can celebrate. Subscribe now (next issue out Tuesda…
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It is so frustrating to know that we could do this thing, this thing that almost all other countries have already done. we could do at any time. but we won’t. https://twitter.com/ASlavitt/status/1287524302309543937
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RT @lmcgaughy: Today, I talked to the mothers of Garrett Foster, the man shot and killed last night at the protest in Austin, and his fianc…
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Replying to @josecastillo
“I haven’t been alseep,” protester Julian Salazar said Sunday morning, after he witnessed the shooting. “It’s been heartbreaking. A lot of us are angry, depressed, sad to learn that his (fiancé) now is going to be struggling. The one person she had here in Austin… is now gone.”
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