Re: Jolla OtherHalf eInk/ePaper display
 

Jolla should just hand him the bare SoC for next phone and start manufacturing whatever Kimmoli builds around it.

Re: Jolla OtherHalf eInk/ePaper display
 

Very goog idea! Before that Kimmoli should make eink-wireless charging-keyboard-combo-toh. Like Swiss knife with everyhting on it.

Re: Jolla OtherHalf eInk/ePaper display
 

A TOH with built in swiss card could actually be useful. (:

Re: Jolla OtherHalf eInk/ePaper display
 

Great work, kimmoli - hats off to you.

An eReader app on eInk, assuming we can shut off the main display on the Jolla, would extend battery life for quite some time (I read books/PDFs from the phone at least an hour a day...).

Great photos! Thank you for all your work.

Re: Jolla OtherHalf eInk/ePaper display
 

I got some more auspicious communication from one display manufacturer, but it might take a while.

Unitl then, work on 2.7" version will slowly continue.

meanwhile, the badger is ATMEGA328 based, which has low amount of memory, and therefore the display buffer is located on the SD card.

I haven't yet figured out is it possible to have the bufffer internally if use micro with larger RAM.

But it also can show images (or ebooks) stored in the SD card, so it could be that this SD card is available externally (?) (but the display will only work when SD card is inserted)

Early 3d sketch:

Re: Jolla OtherHalf eInk/ePaper display
 

Returning to this, actually it is "Dalian Good Display Co.,ltd" product.
This needs +15V, -15V, +22V and -20V voltages and waveforms generated externally. (Recommended to use external ASIC)

Reminds me of one year-ago epaper project with kindle display, which i fustrated to while not getting timings right..
https://lh3.googleusercontent.com/-6...140129_002.jpg

Re: Jolla OtherHalf eInk/ePaper display
 

Do I understand it right that this 3.5" eInk screen cannot be used for TOHeInk? Now you make me sad Kimmoli!

Re: Jolla OtherHalf eInk/ePaper display
 

Don't cry... It just needs a lot more hw around it (and work) compared to the smaller one.
And the get-it-working-properly odds are smaller.

Re: Jolla OtherHalf eInk/ePaper display
 

You made my tears dry out Kimmoli.

Re: Jolla OtherHalf eInk/ePaper display
 

back to this project while waiting prints...

Got one loose 2.7" display today and breakout board.

Then need to pick a microcontroller to do the job. atmega328 or any other used on arduino would be easy as has most of the sw ready. but i have something personal against atmel. maybe i will make testing with teensy 3.1 which i should have few somewhere.
http://www.pjrc.com/store/teensy31.jpg
This is familiar to me, supports most of the arduino libraries. Programming firmware to the K20 used on teensy custom designs requires auxiliary cpu, but it can be hooked on programming adapter (this is the small MINI54 on the lower left corner)

Have to check memory requirements of used libs, but this has 256kB flash and 64kB ram (compared to atmega328 32kB flash and 2kB ram) so maybe no sd card needed...

below is first block-diagram.