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E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

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Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#111
post #107

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.

Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#112

Earlier quoted context omitted.

I wonder what the reason is for this solution. He must have one.

His GitHub says this: "This might sound like a convoluted way to generate the calendar, but I'm doing so mainly because (i) it's easier to format the calendar exactly the way I want it using HTML/CSS, and (ii) I can better delink the generation of the calendar and refreshing of the eInk display. In the future, I might choose to generate the calendar on a separate RPi device, while using a ESP32 or PiZero purely to ju…

He has a valid point, generating the image on a separate device (heck, you could do that on AWS Lambda for free) and only grabbing the resulting image could vastly improve battery life. Then you could also switch from a power hungry Pi to a simpler choice like an ESP32.

Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#113
post #35

Can’t explain why but all these E-Ink projects are so awesome and attractive to me. I’m surprised I can’t just buy a bunch of E-Ink style gizmos from some company to decorate my home and office. My wallet would be wide open to it constantly. Great work and congrats on this!

These projects have a pleasant "lo-fi zen" aspect that makes them attractive, I think. They are simple, provide value yet fade into the background without sucking your attention like some other gadgets.

It’s because it’s not lit. It looks natural, and unobtrusive.

I’d love to have this, art, and other “appliances” and slabs with eink. Ex. My todo list. My email etc.

Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#114
post #107

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.

Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#115
post #91

Can’t explain why but all these E-Ink projects are so awesome and attractive to me. I’m surprised I can’t just buy a bunch of E-Ink style gizmos from some company to decorate my home and office. My wallet would be wide open to it constantly. Great work and congrats on this!

I buy old kindles for this, ~50$ per piece. they have a linux os & battery included. you get in through a serial port and a password generated for your serial number. downside is that you fight the kindle os in certain aspects. see for example: https://github.com/Neelakurinji123/kindle-weather-display

Do you have a list of compatible kindle models, and how to identify them?

Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#116
post #24

i’ve thought about this a lot because i use a whiteboard on my fridge. i would do this if it was huge like my whiteboard. like 2ft by 3ft. then i can read each day at a glance. seeing the whole month is huge. and writing on it means it should be a touch screen i find myself wanting larger displays than is for sale a lot. i want an electric photo frame but not some 12in screen. i have great photos i want to see them 4…

Might be cheaper to put a printer on top of your fridge and automatically print calendar every morning into a plexiglass holder :-)

That could be actually nice!

Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#117
post #46

Earlier quoted context omitted.

That is not clever. That is horrifying. You have just massively bloated your set of dependencies to accomplish something you could have done with a rudimentary GUI toolkit.

“Premature optimization is the root of all evil”—Donald Knuth.

That phrase is so overused in light of massively over engineered solutions that are created every day in our industry . Let’s face it: this project loads some data via http and displays some text and primitives on a display. This can easily be handled on a esp32 with room to spare. But somehow we think it’s normal to involve an OS, a fully fledged computer and a browser to do this. Seriously, we need the opposite of the Knuth quote: “When in doubt don’t ship a browser” or something like that.

Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#118

Nice, but I can't think of less power-efficient embedded platform than an RPi. Especially with something as low power as E-Ink (zero power when displaying). Innophase T2, Dialog DA16200, RedPines (SiLabs) RS9116, RealTek Ameba... they all are super low power (like 100x less than RPi) even while maintaining the 802.11 association, and come with easy SDKs ready for REST HTTPS out of the box (and RTC capabilities, not s…

Sure, there are more power efficient platforms, but the project uses Selenium and PIL which I’m pretty sure won’t run on any of those boards.

I guess you could offload the rendering to a server, but then it’s no longer a self-contained, standalone solution. Trade-offs!

Re: E-Ink Magic Calendar that runs off a battery powered Raspberry Pi

#119

Can’t explain why but all these E-Ink projects are so awesome and attractive to me. I’m surprised I can’t just buy a bunch of E-Ink style gizmos from some company to decorate my home and office. My wallet would be wide open to it constantly. Great work and congrats on this!

I think I know why these look so attractive:

e-ink is the perfect blend between technology (screen can display whatever you want) and the analogue/physical world (it looks like a piece of paper which you can put in a wooden frame and interact with).

Another example for me is the “Buddha Machine” by FM3 (https://www.fm3buddhamachine.com): it’s basically a box that plays some ambient loops (technology) but it looks like a small and unthreatening transistor radio with nice tactile buttons (physical).

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