[shaunsingh0207]

E-ink is extremely expensive, especially at the size of a keyboard like that. Memory LCD would be more practical, but at that point the lcd costs the same and offers more power for those who want it.

There isn't anything stopping you from making the entire screen black except for the legends, probably

[sho_hn]

True dat. I recently made this for my home, as a once-a-day automatic newspaper deco thingie (ticking all the latest hype boxes: wrote a custom Rust driver for the EPD controller, and it's now also using the ChatGPT API to trim and style-transfer articles and headlines -- this and also various layout/typography improvements not yet in that album): https://imgur.com/a/PqkhdGd

$400+shipping for the display panel (a competitive price from the shop). Even at volume (which an enthusiast keyboard won't be) it's still very expensive.

[shaunsingh0207]

Saw your project a few days back, absolutely loved it! Same-ish setup here, a massive e-ink screen hooked up to a controller and pine64 board. I hung it up next to my bed, displays my most important emails/weather/health-notifs etc., everything I need in the morning to get up and running

The cost of the panel makes me cry but there's nothing like e-ink :)

[throwwwaway69]

Very cool - I've been researching something nearly identical and it's nice to see your implementation of it. Unfortunately I'm not sure I want this bad enough for the $500 in hardware costs.

[vopi]

I was recently messing around with a very small eink display (and used it to display HN posts somewhat similar in concept to you). Out of curiosity, what display is that/where did you source it from?

[sho_hn]

It's a 13.3" 1600x1200 panel made by E Ink, from the Carta product line also used in Kindles et all, the ED133UT2. I bought it via Waveshare together with a little driver board featuring the ITE IT8951 controller: https://www.waveshare.com/product/displays/e-paper/epaper-1/...

The ED133UT2 is also available from E Ink directly and from other shops, but I haven't seen a significantly better price. There are also some other boards with the same controller around. An alternative to using the IT8951 is to hook the display up to an MCU with an adapter board for the flex cable directly and then drive the waveforms from the MCU, this is more complicated however and a little controller talking SPI is quite nice to have.

There's also a 10.3" with an even higher resolution that is very nice for various applications.

[vopi]

Ahh thanks!

[muyuu]

yea it's a shame that e-ink screens larger than 6in or so get so much more expensive, they're not practical for low-cost appliances and toys

[edu115]

Can you let me know where you sourced the screen?

[sho_hn]

See my reply to your sibling :-)

[jrockway]

Yup. TFT LCDs are in everything because they are so cheap, and they make designers who are used to designing for computers feel less constrained.

I have indoor and outdoor air quality sensors in my apartment; the outdoor air quality monitor is an LCD and the indoor one is e-ink. I kind of like the LCD better, but have to use a feature to turn off the screen at night so it's not illuminating the entire room with its backlight. The e-ink doesn't emit light, but it also doesn't update as frequently, so it's often displaying information that's out of date. Because of the various pros and cons, neither technology seems like a "win" over the other; the product designer has to pick one and hope the market agrees. LCDs get the nudge because of cost, though.

[mihaaly]

> There isn't anything stopping you from making the entire screen black

Except perhaps product designers wanting to make a flashy product that draws attention all the time, 24/7, pushing through '''features''' that leverage (force) full screen animations in the driver software.

I am bitter, yes, I met too many excellent hardware ruined by stupid, oversized, look-before-function attitude software. Making it grand and flashy (eventually overcomplicated and ugly) not because it is useful but because they can.

[dogma1138]

Yet E-ink is cheap enough for price tags at big box stores…?

[yurishimo]

My understanding is that the price of the displays is largely dependent on the size of the screen due to manufacturing techniques. I don't know the specifics unfortunately.

[shaunsingh0207]

E-ink gets exponentially more expensive with size, and an e-ink panel in this keyboard would have to have a fairly decent resolution and refresh rate, whereas the price tags are usually 1-bit color, low res, and barely have to refresh