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E-Paper Wall Paper
- xvector 4y agoIt sucks that eink is still so ridiculously expensive. I recently had to pay around 2k for a 32" eink device. Bonkers pricing.
- andai 4y agoWoah, that's TV size, I didn't know they made those. What are you using it for, what's it like?
- Wingman4l7 4y agoYep, there are some Chinese manufacturers making them; I occasionally see information popping up on them on e-reader devices news websites. As you can see though, still not cheap.
- Animats 4y agoHere are some of the larger e-ink displays.[1] No prices given. They're being pitched to cities as bus stop displays, because they can be run from a small solar panel. It might make sense for that, because having power run to a bus stop sign probably costs more than an expensive E-ink panel. I notice that some Alibaba sellers of similar displays copied some of their images from that site. [1] https://www.smartcity-displays.com/large-format-e-ink-displays/ https://www.smartcity-displays.com/large-format-e-ink-displa...
- harvey9 4y agoYou still need the bus data sign illuminated at night, and bus stops have plenty of room on top of the shelter for a larger solar panel.
- Wingman4l7 4y agoBoston's got some of the solar-powered ones, I've seen them late 2022: https://blog.eink.com/bostons-ink https://blog.eink.com/bostons-ink Looks like they were also using them for transit at one point, but I haven't seen these myself: https://www.mbta.com/projects/solar-powered-e-ink-signs https://www.mbta.com/projects/solar-powered-e-ink-signs
- ra423 4y agoCan you share the images of the device?
- muyuu 4y agoyep, even 13~14in bare e-ink screens are the price of mid-range tablets I guess the market isn't quite there
- throwoutway 4y agoIt's usually explained as being "the patents are owned by a company squeezing every cent of licensing rights". I wonder when those patents expire
- braunboffel 4y agoIt sucks that u_e = v/E . Bonkers.
- userbinator 4y agoThe colour is surprising --- the images displayed on them don't look like they're grayscale. It only has 64kb of flash onboard, so [Aaron] devised a clever compression technique that enabled him to store complex images on the displays. Note that an EPD itself is a "write only" memory with no minimum clock rate, so images can be streamed directly over the network to it.
- jtbarrett 4y agoThe displays can show black, white and red. He picked a good image for that palette. Still, the dithering was surprisingly effective.
- TylerE 4y agoSounds like the early two color process in Hollywood… they got red (for skin tones) and a sort of teal blue green that could sorta do plants and sorta do sky, but wasn’t real convincing at either.
- throwthrowuknow 4y agoThey should have used orange and blue https://tvtropes.org/pmwiki/pmwiki.php/Main/OrangeBlueContrast https://tvtropes.org/pmwiki/pmwiki.php/Main/OrangeBlueContra...
- stavros 4y agoDithering is amazing. I built a display to show my calendar: https://www.stavros.io/posts/making-the-timeframe/ https://www.stavros.io/posts/making-the-timeframe/ When testing it out, I tried to show a grayscale image, because the display supports four tones, but it came out horrible. Then I displayed a dithered two-tone image (black and white) and it was much, much better: https://www.stavros.io/posts/making-the-timeframe/dithered.jpg https://www.stavros.io/posts/making-the-timeframe/dithered.j... I wonder if there are any arbitrary-palette dithering algorithms that I could try, it would be great to be able to use the other two tones and still dither.
- basement42 4y agoThese remind me of that company called nanoleaf, they sold these stackable canvas led squares that really was beautiful but expensive if I remember correctly. But these seem to be a cheaper alternative, cool!
- voytec 4y agoI have two sets of Nanoleaf Canvas (they have more shapes now). The "main node" from the first set of 9 squares stopped working after about 2 years. I bought another set of 9 squares to use the main node from the new one with 8 squares left from the first set and 8 squares from the new one. Sadly, they didn't fixed issues in years and are selling buggy product which can reset itself few times within 2 minutes (only in certain color modes but reboots take more time than working mode) and leaves (heh) me with just a few options to choose from if I don't want the product to constantly reboot itself and show pale-white color for 30 seconds. I was considering buying their newer products but decided not to as I don't appreciate company which sells stuff they well know is faulty. For reference, both older and newer Nanoleaf Canvas are the model NL29-0002SW-9PK and were bought off their official Amazon store.
- foobarbecue 4y agoInteresting how closely your experience mirrors mine. Bought 2 sets of Canvas back when they came out. Panels all still work and one of the "main nodes," but the other node just up and died. I haven't done the autopsy yet.
- gambiting 4y agoThey still exist. I'd argue Govee has a superior version of that product for less money, but you can still buy the original Nanoleaf.
- realworldperson 4y ago[dead]
- taf2 4y agoI wonder if E-Paper could be a suitable camouflage in Ukraine to hide from drones? Most of the drone clips I've seen are with visible light but maybe are the drones using other light sources? If not a massive epaper display or even many smaller ones... could be feasible camouflage?
- kayodelycaon 4y agoCamouflage works better on things that aren’t moving. And it wouldn’t stop infrared, laser designators, or radar. The best camouflage from the ground is to fly low and have a color scheme that is difficult to read against the sky. Gray works well.
- deleted 4y ago[deleted]
- sho_hn 4y agoHere's a build log of a recent e-ink project of mine, using ChatGPT and Rust: https://imgur.com/a/NoTr8XX https://imgur.com/a/NoTr8XX
- unshavedyak 4y agoHow much did that run you? That looks awesome and i'd buy one right now if someone made this or made it easy for me to make it
- sho_hn 4y agoAbout $550 total. $400+shipping for the panel, $100+shipping for the Halbe frame with low reflection glass and a passepartout cut to size, $50 for the other bits. There's a 10.3" panel for half the price. With an IKEA frame etc. you can probably do a slightly smaller $250 build.
- hultner 4y agoThat’s terrific, quite inspiring! A couple of questions, if that is okay; How much did all of it run you down in the end? How do you recharge the battery? Did you consider adding a USB-C charge port somewhere? How much does it cost you to use the ChatGPT-API?
- sho_hn 4y ago(1) See my reply to your sibling re build cost rundown :-) (2) If you take a close look at the build, the module at the bottom is a little BMS board with a USB-C connector for charging! That said, I made the battery detachable with glue-on velcro pads and also have a Riden bench PSU with a very convenient battery charging mode. Often I don't bother with a USB receptacle and charging circuit for DIY projects and just go that route. (3) I currently use the gpt-3.5-turbo model on the OpenAI, which at present costs $0.002 for 1000 tokens. 1000 tokens are about 750 words. I make between 8 and 16 API calls to the OpenAI API for an update, with an in/out total of about 6000-8000 tokens on average (mainly because I am submitting the original article texts). I update the newspaper once a day in the morning. The total monthly cost is very low.
- deleted 4y ago[deleted]
- xd1936 4y agoI'm a simple man. I upvote any eInk/ePaper project I see on HN. Love this.
- lordfrito 4y agoIt's cool but not really "wall paper".
- 1MachineElf 4y agoAwesome project, however, expensive. Conceptually e-paper may have been a misnomer. Considering the cost and scarcity, it really has nothing in common with ubiquitous and cheap paper.
- Sk012 4y agoAdd comment