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Show HN: Low-power Kindle-based dashboard

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Re: Show HN: Low-power Kindle-based dashboard

#41
post #38

Earlier quoted context omitted.

You can configure it to poll for messages on a fixed interval. Pushing is not possible since it would sacrifice the battery life.

What if you could build this product but to also allow for the direct power supply connection ?

There is a micro-USB connector on the back which you could just permanently hook up to a power supply. When the battery life is not part of the equation anymore, making push available is not a problem.

Re: Show HN: Low-power Kindle-based dashboard

#42
post #36

Very cool. If someone is looking for a device with even better battery life: I created something similar -- albeit with a different approach to its visual appearance. See: https://framelabs.eu/en/

I would love to buy it if you can provide a way to push the message.

Re: Show HN: Low-power Kindle-based dashboard

#43
post #30

It's a pity there isn't more action in the e ink application/device world. Seems like there's so much potential. I'd love a kindle-like laptop for writing. I guess it's just extremely hard to compete for a beachhead against an incumbent (mobile touch displays) that's more general and mass produced.

In terms of a Kindle-like laptop for writing, I’ve seen people enjoy the Freewrite Traveler (though it’s not for me): [1] https://getfreewrite.com/products/freewrite-traveler

I'm skeptical about the narrow horizontal screen. I'd actually prefer in oriented the vertically for writing.

Re: Show HN: Low-power Kindle-based dashboard

#45
post #9

If you don't have a spare Kindle lying around, smallish e-paper modules are nowadays quite cheap, and can be driven easily from a Raspberry Pi (Zero W upwards). That's what we did on our boat: https://github.com/meri-imperiumi/dashboard

I am thinking about this (e-paper) but drive it from an ESP (preferably 01) and connect it to a battery where it could last say months/years that would be nice. I was able to do a hardware mod someone posted where you can put it into a self-wake deep sleep if that makes sense for power saving. Otherwise I currently do desktop notifications/speech text. I have a basic Kindle too (paper?) And it's amazing the battery l…

I saw this recently https://m5stack.com/products/m5paper-esp32-development-kit-9...

The company M5 makes incredible gear for this. Their ESP32-Pico Atom chips are all I use.

Re: Show HN: Low-power Kindle-based dashboard

#46
post #30

It's a pity there isn't more action in the e ink application/device world. Seems like there's so much potential. I'd love a kindle-like laptop for writing. I guess it's just extremely hard to compete for a beachhead against an incumbent (mobile touch displays) that's more general and mass produced.

In terms of a Kindle-like laptop for writing, I’ve seen people enjoy the Freewrite Traveler (though it’s not for me): [1] https://getfreewrite.com/products/freewrite-traveler

Would love this jailbroken, a text dedicated device would be wonderful for coding, terminal emulation, even e-mail.

Re: Show HN: Low-power Kindle-based dashboard

#47
post #21

Earlier quoted context omitted.

I considered this as well but didn't really want to mess with the hardware. But if you're up for that you can buy the components yourself, or go for something like inkplate [1] which is an E-paper display + ESP microcontroller and battery in one package. [1] https://inkplate.io/

$100? hmm this price may not be that bad though, considering the display seems to be the most expensive aspect and I'm not finding a similar price/size on Amazon. One thing I want to learn/address personally is a charging circuit so I'd rather build it myself. Still it is nice to know this is out there ready to go. Also I have to use these ESP01's I bought haha. The code itself I imagine wouldn't be difficult eg. an…

The price definitely seems great for the size of the display, but it might be worth looking at the Waveshare e-paper displays if you want to do something a bit more DIY.

Re: Show HN: Low-power Kindle-based dashboard

#48
post #18

This code does not render the dashboard itself. It's expected that what to display on the screen is rendered elsewhere and can be fetchd via HTTP(s). This is both more power efficient and allows you to use any tool you like to produce the dashboard image. I love these “under engineered” solutions. I’d be tempted to do everything in the Kindle itself, but he achieved what he needed with much less effort and higher fle…

I think this has been the standard approach for all e-ink displays that have been floating around (both homemade and commercial).

So, yeah, I appreciate it but it's not specifically innovative in this regard.

Re: Show HN: Low-power Kindle-based dashboard

#49

Earlier quoted context omitted.

$100? hmm this price may not be that bad though, considering the display seems to be the most expensive aspect and I'm not finding a similar price/size on Amazon. One thing I want to learn/address personally is a charging circuit so I'd rather build it myself. Still it is nice to know this is out there ready to go. Also I have to use these ESP01's I bought haha. The code itself I imagine wouldn't be difficult eg. an…

The price definitely seems great for the size of the display, but it might be worth looking at the Waveshare e-paper displays if you want to do something a bit more DIY.

Yeah those look great. I'm hoping they have a built in driver or whatever and you just send the display data as serial/i2c or something.

Re: Show HN: Low-power Kindle-based dashboard

#50

Earlier quoted context omitted.

I am thinking about this (e-paper) but drive it from an ESP (preferably 01) and connect it to a battery where it could last say months/years that would be nice. I was able to do a hardware mod someone posted where you can put it into a self-wake deep sleep if that makes sense for power saving. Otherwise I currently do desktop notifications/speech text. I have a basic Kindle too (paper?) And it's amazing the battery l…

I saw this recently https://m5stack.com/products/m5paper-esp32-development-kit-9... The company M5 makes incredible gear for this. Their ESP32-Pico Atom chips are all I use.

That's an interesting form factor, almost looks like a phone.
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