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Show HN: HackerBooks – HackerTube, but for books mentioned on HN

https://hackerbooks.org
919•roansh•9h ago•178 comments

HackerTube: YouTube built from videos recommended by HN

https://karpathy.bearblog.dev/hacker-tube/
2287•karpathy•1d ago•540 comments

Nibnib: Image compression with extreme decompression speed

https://github.com/raphlinus/nibnib
94•raphlinus•2d ago•13 comments

Ask HN: Which TV do you recommend for privacy?

138•LecroJS•6h ago•250 comments

America on Data Centers: listen to 10,000+ city council comments

https://www.americansentiment.com/datacenters
13•afandrew•1h ago•16 comments

Postgres 19 is late, and it's AI's fault

http://rhaas.blogspot.com/2026/10/postgres-19-is-late-and-its-ais-fault.html
58•soheilpro•2d ago•44 comments

Tips for more effective fuzz testing with AFL++

https://nullprogram.com/blog/2025/02/05/
74•luu•4d ago•13 comments

Keeping Up Appearances – The women taking over the funeral industry

https://lareviewofbooks.org/article/death-industry-mortuary-programs-women-andie-eisen-quarterly/
19•TMWNN•2d ago•2 comments

Copper – A minimal low-level programming language with OOP and generics

https://tibleiz.net/copper/
128•bogdanoff_2•2d ago•74 comments

New 3D thermal invisibility cloak makes objects disappear from infrared cameras

https://www.sciencedaily.com/releases/2026/10/261025073051.htm
40•stevenalowe•2d ago•23 comments

Show HN: OmniDiff – Opensource, super fast, content aware Git difftool, in Rust

https://github.com/ivankovic/omnidiff
159•FabCH•12h ago•41 comments

Mathematics has changed. Let's act like it

https://terrytao.wordpress.com/2026/11/01/mathematics-has-changed-lets-act-like-it/
222•smilelamp•7h ago•245 comments

AI delivers 'zero financial payoff' to most companies, Apollo economist says

https://techcrunch.com/2026/10/25/ai-delivers-zero-financial-payoff-to-most-companies-according-t...
159•throwoutway•3h ago•131 comments

Proving and improving the Platonic Representation Hypothesis with JEPAs

https://arxiv.org/abs/2610.39302
109•Anon84•12h ago•60 comments

The She-Wolves of Jülich

https://www.historytoday.com/archive/history-matters/she-wolves-julich
13•Thevet•1d ago•2 comments

Lenovo's 'encrypted' fingerprint USB is just an unencrypted SD card in a case

https://www.reddit.com/r/technology/comments/1xl2pr3/lenovos_encrypted_fingerprint_usb_drive_is_j...
392•entryleveljobsc•11h ago•144 comments

Bidirectional charging during grid outages

https://www.jefftk.com/p/bidirectional-charging-during-grid-outages
85•luu•1d ago•124 comments

One-minute frequency disturbances from synchronization in power systems

https://www.nature.com/articles/s41560-026-02144-0
122•croes•1d ago•40 comments

A Chemical Hunger (2021)

https://slimemoldtimemold.com/2021/07/07/a-chemical-hunger-part-i-mysteries/
8•bilsbie•1d ago•2 comments

The AI cost of JavaScript frameworks

https://nolanlawson.com/2026/10/28/the-ai-cost-of-javascript-frameworks/
294•luu•19h ago•228 comments

Novellas with Groff

https://movq.de/blog/postings/2026-10-31/0/POSTING-en.html
110•dverlaeckt80•11h ago•49 comments

Parchment Paper History: How We Got Paper Perfect for Baking (2019)

https://tedium.co/2019/11/21/nonstick-parchment-paper-history/
37•colinprince•1d ago•19 comments

Radiation Map of the World

https://radiaverse.com/
127•slater•4d ago•40 comments

Show HN: I rebuilt my old canvas 3D library as a small WebGL 2 library – phoria2

https://kevs3d.co.uk/phoria2/
74•kevs3d•1d ago•11 comments

Seoul Viosys begins production of rare-earth-free white light emitter

https://www.semiconductor-today.com/news_items/2026/oct/seoul-291026.shtml
135•gmays•9h ago•33 comments

Show HN: Point your camera at a landscape to learn about its geology

https://outcrop.rocks/
152•headsupernova•3d ago•38 comments

Domain hacks with unusual Unicode characters (2018)

https://shkspr.mobi/blog/2018/11/domain-hacks-with-unusual-unicode-characters/
55•n_plus_1_acc•14h ago•47 comments

Frontier Airlines Likely Breached

https://www.reddit.com/r/frontierairlines/comments/1xl20e8/psa_email_scam/
172•999900000999•8h ago•65 comments

Patrick Stewart taught us what good men do with power

https://www.vox.com/politics/508526/patrick-stewart-jean-luc-picard-star-trek-liberalism
368•rhaynes•8h ago•261 comments

Landline phones will switch off across Britland in 100 days, no extensions

https://www.theregister.com/networks/2026/11/01/landline-phones-will-switch-off-across-britland-i...
133•edward•10h ago•109 comments
Open in hackernews

Show HN: I made my own TRMNL e-ink device

https://www.stavros.io/posts/making-a-trmnl-device/
85•stavros•1y ago

Comments

estsauver•1y ago
This is neat--what's the typical refresh rate/update speed for the image service?

Is the API is basically "Push PNG to server, PNG displays on whiteboard?"

stavros•1y ago
No, TRMNL generate the images themselves. The device requests the image every so often (with an interval configurable by the server). They've (understandably) built the firmware to be pretty specific to their service, though you can build your own server for it as well (it's just a JSON response with the image to fetch).
joshstrange•1y ago
The API is:

You write HTML templates (that are stored on their servers) then can post data to them (or have them poll an endpoint to get the data) to "merge" into the template.

Think:

    <h1>Hi {{ username }}</h1>
    <div>You have {{ openPRCount }} open PRs</div>
And you need to provide (via push or pull):

    {"username": "joshstrange", "openPRCount": 10}
That might not be the exact syntax (I wrote my custom plugin a month or two ago and haven't touched it since).

They provide a "UI Library" (Design System) [0] to give you building blocks of UI to use if you want.

It made it really easy to get started. They limit to 1 screen update every 15min (that is the fastest you can have the screen update). But you can press the restart button on the back of the device to force it to update, you might need to force your plugin to re-generate the image before you do that.

If you want to flash your own firmware you can lower that (at the expense of battery life) value or even have it call out to your own server that can do whatever you want.

[0] https://usetrmnl.com/framework

JKCalhoun•1y ago
TRMNL's site seems to think there is not a cost-savings to build-your-own. They don't appear to include the licensing cost though. From their site:

> Making your own TRMNL from scratch is not an economically rational decision, but rather a labor of love. Our own team learned this the hard fun way while building v1 over 7 months, from Dec 2023 to July 2024.

> Here's what you can expect to spend per component:

> • Battery, $5 (unnecessary if you prefer plugged in)

> • EPD screen, $65 (see the Waveshare 7.5" on Amazon)

> • Microcontroller, $3-50 (depends if you build/solder yourself or leverage a PCB prototyper)

> • Enclosure/case, $3-20 (design + 3D print yourself or use a print farm)

stavros•1y ago
Yeah, my BOM was $20 for the driver and $50 for the screen, plus $50 for the TRMNL license. About the same as the TRMNL I bought, in the end, though as you say the license is a big part of it.

My worry is about my lifetime license eventually turning into a subscription requirement.

n8cpdx•1y ago
> I could have my own TRMNL for under $80, or, if you factor in my time, around $5,000, which is a bargain

I love the self awareness.

I'm trying to be better about factoring in my time, largely unsuccessfully.

E.g. I just spent $200 of my time trying to trade in an iphone at the apple store (the Apple Store sucks now and has terrible processes). Value of trade in: $200

stavros•1y ago
The trick is that, if you're enjoying the process, the cost is negative! Trading in an iPhone doesn't sound very enjoyable, but to each their own.
drcongo•1y ago
stavros is one of my favourite posters on HN, and the writing on his site is full of beautiful turns of phrase like that.

> The Timeframe is a beautiful, battery-powered, high-resolution e-ink device that sits on my desk and reminds me of the inexorable grind that saps my creativity and drains me of the will to live.

From https://www.stavros.io/posts/making-the-timeframe/

edit: Ever since I read the Timeframe article I've been itching to do the same thing myself, but I suck at these things so worry that I'm just going to end up with more piles of electronic parts in my cupboard of broken dreams.

billev2k•1y ago
Speaking of a beautiful turn of phrase: "...more piles of electronic parts in my cupboard of broken dreams."

:)

stavros•1y ago
joshstrange•1y ago
> $20 “developer edition” license which “unlocks their API”. I expected this upgrade to give me API access so I could retrieve the image that’s displayed of my device, but that’s not actually the case, and you need a $50 “virtual device” license for that.

I cannot find a mention of the developer edition. I own a TRMNL and use the api for free (I assume because I have a device) and then they offer a lifetime $50 license to use their backend with your own device. I think that's fair.

Also, I don't quite understand their back ordering information. I ordered mine and got it less than a week later even though they said it was back ordered.

stavros•1y ago
That option is for when you add it to your cart. You get API access with the device because you have one, but AFAIK you can't develop plugin without the dev option? I don't know, I'm confused :(
joshstrange•1y ago
Interesting, I have developed plugins for my TRMNL and I only paid for the device.

Or at least I've developed HTML-based views that are custom (I think that's "plugins") that are displaying on my device.

stavros•1y ago
Hm :/ I wonder why I paid the extra $20, then...
I call it the "cupboard of infinite possibilities".
stavros•1y ago
Email me and I'll help you!
sho_hn•1y ago
Have mine in the hopes of making your itch unbearable: https://imgur.com/a/diy-automatic-e-ink-newspaper-using-rust...

You can do it! :-) Also happy to help if you have questions.

stavros•1y ago
Oh I had seen yours! What a fantastic project, well done. Beautiful result.
sho_hn•1y ago
Thanks!

I'm currently making something inspired by your Timeframe, but using an OLED panel, as a 2nd screen for my desk - but almost the same form-factor and a similar design.

I'm trying out a faux 3D-printed wood process with wood powder-infused PLA, sanding and staining, and a faux wood grain I baked into the geometry using a displacement map, though. Hoping to make it all posh.

stavros•1y ago
That sounds fantastic! I'd love to see updates, we have a maker Discord server I can invite you, if you're interested, or it would be fun to just email! My email is in my profile.
KMnO4•1y ago
How did you come to the $200 figure?

Your time does have value, but it’s in terms of opportunity cost, not hourly wage. Presumably you wouldn’t have made $200 had you not gone to the Apple Store (unless you went when you were supposed to be working and have a job where that time becomes unpaid).

stavros•1y ago
Not the OP, but I just figure that I could be contracting somewhere at any point, really, so each hour costs me my fee.
n8cpdx•1y ago
I'm paid by the hour and the Apple Store is a block away from my place of work, so in this particular case it is pretty clear cut. I realize it is different for people paid a fixed annual salary.

Although in hindsight it probably felt like I spent more time there than I actually did. I think the $200 is fair given that I would normally be quite willing to pay to avoid that kind of unfortunate circumstance.

And of course that leaves out the complication of pre- vs post-tax wages, retirement savings, etc.

turtlebits•1y ago
You can always trade in by mail. I just did it for my M1 Air. I still need to drop it off at UPS, but no driving to the mall, parking, and waiting in line.

This is also why I buy almost everything from Amazon. Their returns process is worlds ahead of every one else. It also doesn't hurt that drop-offs are at grocery stores.

n8cpdx•1y ago
My problem is I initially had a trade in by mail in process. But since I have to walk by the apple store daily on my way to work, it was one of those rare moments where mail was actually less convenient. And I was concerned about the mail in return contractor deciding the phone is worthless (it happens).

Apple made me call to cancel the trade in, then said they could do it in store. They could not, not then, not an hour later, not days later.

Internet and apple store employees said it should be fine. I guess they don't make geniuses like they used to.