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Custom telescope mount using harmonic drives and ESP32

https://www.svendewaerhert.com/blog/telescope-mount/
123•waerhert•3h ago•35 comments

UK drops demand for backdoor into Apple encryption

https://www.theverge.com/news/761240/uk-apple-us-encryption-back-door-demands-dropped
139•iamdamian•1h ago•24 comments

Lazy-brush – smooth drawing with mouse or finger

https://lazybrush.dulnan.net
348•tvdvd•3d ago•44 comments

Prime Number Grid

https://susam.net/primegrid.html
178•todsacerdoti•6h ago•70 comments

PyPI Preventing Domain Resurrection Attacks

https://blog.pypi.org/posts/2025-08-18-preventing-domain-resurrections/
29•pabs3•3h ago•3 comments

Launch HN: Uplift (YC S25) – Voice models for under-served languages

11•zaidqureshi•1h ago•7 comments

OpenMower – An open source lawn mower

https://github.com/ClemensElflein/OpenMower
422•rickcarlino•13h ago•100 comments

Critical Cache Poisoning Vulnerability in Dnsmasq

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2025q3/018288.html
11•westurner•45m ago•1 comments

How to Build a Medieval Castle

https://archaeology.org/issues/september-october-2025/features/how-to-build-a-medieval-castle/
118•benbreen•8h ago•23 comments

Apple has not destroyed Steve Jobs' vision for iPad

https://victorwynne.com/vision-for-ipad/
23•curtblaha•1h ago•38 comments

EloqKV, a distributed database with Redis compatible API (GPLv2 and AGPLv3)

https://github.com/eloqdata/eloqkv
12•cloudsql•1d ago•7 comments

Show HN: Whispering – Open-source, local-first dictation you can trust

https://github.com/epicenter-so/epicenter/tree/main/apps/whispering
464•braden-w•20h ago•124 comments

In 2006, Hitachi developed a 0.15mm-sized RFID chip

https://www.hitachi.com/New/cnews/060206.html
35•julkali•3d ago•15 comments

Ted Chiang: The Secret Third Thing

https://linch.substack.com/p/ted-chiang-review
175•pseudolus•13h ago•74 comments

The Life and Death of London's Crystal Palace (2021)

https://heritagecalling.com/2021/11/29/picturing-the-crystal-palace/
26•zeristor•4d ago•9 comments

Counter-Strike: A billion-dollar game built in a dorm room

https://www.nytimes.com/2025/08/18/arts/counter-strike-half-life-minh-le.html
413•asnyder•22h ago•344 comments

'Ad Blocking Is Not Piracy' Decision Overturned by Top German Court

https://torrentfreak.com/ad-blocking-is-not-piracy-decision-overturned-by-top-german-court-250819/
27•gslin•1h ago•5 comments

Tiny-tpu: A minimal tensor processing unit (TPU), inspired by Google's TPU

https://github.com/tiny-tpu-v2/tiny-tpu
225•admp•17h ago•9 comments

X-ray scans reveal Buddhist prayers inside tiny Tibetan scrolls

https://www.popsci.com/technology/tibetan-prayer-scroll-scans/
135•Hooke•2d ago•47 comments

Show HN: I built an app to block Shorts and Reels

https://scrollguard.app/
617•adrianhacar•2d ago•262 comments

Left to Right Programming

https://graic.net/p/left-to-right-programming
371•graic•20h ago•300 comments

Obsidian Bases

https://help.obsidian.md/bases
589•twapi•16h ago•197 comments

Walkie-Textie Wireless Communicator

http://www.technoblogy.com/show?2AON
166•chrisjj•3d ago•104 comments

FFmpeg Assembly Language Lessons

https://github.com/FFmpeg/asm-lessons
389•flykespice•1d ago•125 comments

How to Use Snprintf

https://bernsteinbear.com/blog/snprintf/
30•surprisetalk•2d ago•14 comments

Electromechanical reshaping, an alternative to laser eye surgery

https://medicalxpress.com/news/2025-08-alternative-lasik-lasers.html
271•Gaishan•1d ago•118 comments

A Case for Protecting Computer Games with SGX (2016)

https://dl.acm.org/doi/10.1145/3007788.3007792
7•turrini•2d ago•2 comments

Show HN: We started building an AI dev tool but it turned into a Sims-style game

https://www.youtube.com/watch?v=sRPnX_f2V_c
131•maxraven•18h ago•68 comments

Croatian freediver held breath for 29 minutes

https://divernet.com/scuba-news/freediving/how-croatian-freediver-held-breath-for-29-minutes/
257•toomanyrichies•13h ago•121 comments

An IRC-Enabled Lawn Mower (2021)

https://jotunheimr.idlerpg.net/users/jotun/lawnmower/
110•rickcarlino•2d ago•21 comments
Open in hackernews

In 2006, Hitachi developed a 0.15mm-sized RFID chip

https://www.hitachi.com/New/cnews/060206.html
35•julkali•3d ago

Comments

rwmj•2h ago
The most amazing thing about this (and another tiny RFID chip that was on HN recently) is not that you can print them on wafers, but that you can cut up the wafers and handle these tiny dies. Imagine you manufactured sugar, but had to manipulate each sugar grain separately.
riedel•2h ago
I was in a project with MAN Roland and the university of Dresden at the same time and the most important thing is roll to roll printing. This actually works well if you do not need an external antenna. What was the holy grrail at the time was to print also the antennas, get a decent coupling and then actually also do item and not only batch level tracking of the packaging you would print. Particular Pharma was really interested in terms of anticounterfeiting at low cost.
vlabakje90•1h ago
It thought it was an interesting analogy, so I looked up the size of a typical sugar crystal. It's between 450 and 600 microns. So these chips are 3 to 4 times smaller than that even.
UomoNeroNero•1h ago
This is the really interesting Thing!!!! And: how they can have different ROM content (code) for each chip
dfox•19m ago
If you want the bare chips and not full assembled labels the usual packaging is uncut wafer and cutting out and handling the individual dies is your problem.
notachatbot123•2h ago
Is it possible to buy and use such tiny chips?
IndrekR•1h ago
Used to develop readers based on similar UHF chips (868 MHz in EU). They were quite expensive compared to printed bar codes those were replacing. Also large. With (folded) antennas we are still talking about 40*10 mm minimum for the label. You can not use them on metal surfaces. Readers nearby will interfere as it works by EM wave backscattering, unlike NFC which is essentially a transformer (with electric field intentionally supressed usually). I think it still is a solution looking for problem. QR codes are cheap and NFC (14 MHz) readers are everywhere.
dfox•34m ago
I did work with that recently. Did a few cool demos.

The tags got cheaper and you can even get tags that are intentionally designed for metal surfaces. Unlike NFC (or barcodes, obviously), you can read hundreds of tags essentially simultaneously. But because the reading is far from being perfectly reliable (one thing we found out is that human body blocks the 868MHz RFID completely, even at something like 50dBm EIRP, which is well above what is considered safe for human presence) the applications are indeed somewhat limited.

But apparently there are two classes of applications where this technology is really common: libraries and bulk checkout at sports equipment retailers (seems oddly specific). Both of these things also benefit from the "advanced" features of UHF RFID tags like dual-mode RFID/EAS tags and ability to permanently deactivate the tag by simple command.

krogenx•15m ago
I have a hobby project where I am using UHF tags for counting poultry. The advantage that it gives me is long range (few meters) compared to LF / HF tags. QR code also wouldn't work due to size and distance.

Here's a video.

https://youtu.be/_iGn_pZ3IkY

progbits•2h ago
Still needs an antenna tuned to the RFID frequency which will be much larger than the chip. It's cool engineering but doesn't mean you can have a working sub-mm tag.
stavros•1h ago
No, but the chip does usually put a cap on the thinness of the whole assembly (e.g. for cards). This means you can have a paper-thin NFC sticker (which we have now, I guess).
alliao•1h ago
honestly given how long ago that was I'd not be surprised if everything's completely peppered with chips... one from the manufacturer, one from inventory, one from logistic, one from corporate espionage agent, one from foreign adversary state actor sky really is the limit with these. didn't parmesan put some chips in their cheese too?
janice1999•1h ago
Sounds crazy but car and truck tires have had RFID chips for years. I assume most people would be surprised by that.

https://www.tirereview.com/michelin-connect-car-tires-rfid-2...

transcriptase•59m ago
Imagine if the crazies were right and the Covid vaccines actually did have RFID.
ashleyn•58m ago
In an early example of conspiracy theories that would eventually envelop social media, I actually remember internet commenters pointing to the previous generation of these as supposed "proof" that the government was embedding RFID chips in banknotes to track people (following a blog article by Alex Jones): https://news.slashdot.org/story/04/03/02/0535225/do-your-20-...