Hey guys,

I just wanted to show off the new battery-powered E-Ink picture frame that I have been working on for the last couple of months.

It took a lot of work. I hope you like it.

Very nice. If you don't have the time to build one yourself, you can also buy them here:

https://framelabs.eu/

Note: I sell them.

These don’t support an iCloud album do they, only photo uploading over WiFi?

Actually my devices can download from remote sources as well. An iCloud bridge is be necessary, though.

Shameless plug: I build devices like that and sell them. Battery powered.

https://framelabs.eu/en/product/artframe-31/

I use the 31.2" panel because it is 40% cheaper and has higher DPI, but the 42" panel is also possible.

Knowledge about complexity classes is an issue that at least many hobbyists seem to miss.

Any reading on this you'd recommend?

I'll rephrase. Learn about the basic container data structures like linked list, vector, set, map, hash, tree, queue, heap.

Study time complexity of insertion, deletion, search, etc. in these data structures. Then you will understand when to use which. Big O notation is used to express time complexity for expected runtime of the operations.

This calender-thing really seems to resonate with people!

I built something similar but more versatile, where you can either display images or feed the display with whatever information you want remotely. And it runs on a battery for a whole year:

https://framelabs.eu/en/

Really well done!! Looks great. Although price seems reasonable, it is still quite a lot of money.

Did you actually sell screens already? I can imagine design stores want to sell this.

I went online about a year ago. So yes, I already sold a lot of devices.

The written sizes are correct. By default I will manufacture the two smaller displays with the same frame dimensions. The small device in the comparison image is from a custom order, which allows for a better size comparison. For custom orders I can create the frames in arbitrary sizes accurate to a millimeter. I'll add a note.

Oh, ok. Thanks for the clarification.

I actually have an Inkplate at home. The 8 gray shades they support are unfortunately not evenly distributed, which makes it difficult to display images in good quality.

EPDiy looks interesting, though.

What does it do for shades that aren’t those 8? Does it apply any sort of dithering?

Maybe it just needs a better lookup table or some preprocessing.

I’ve seen some impressive 1-bit displays, so 8 shades shouldn’t be harder than that.

You can't define more than 8. The API allows only 3 bit input. I also tinkered with the lookup table, and was able to create a lot of different gray shades, but I was not able to produce ~40-60% gray.

If you want to hack it and don't want to pay for consumer grade quality for neither hardware nor software, then the device you linked is a good choice.

e-Ink price tags are designed to be used and abused by store public who do not care about store property. They are built like tanks, so "consumer-grade quality" would in fact be a downgrade...

If your grandparents have WiFi at home, you can do exactly that. There is a mode to periodically fetch images from a remote URL.

Maybe I should think about building a mechanical version ;)

Now, that, I might go for. Especially if it makes a noise like an old flip clock when the images change. :)