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How to prolong lithium based batteries
Manufacturers take a conservative approach and specify the life of Li-ion in most consumer products as being between 300 and 500 discharge/charge cycles.…
Most cited
Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 528 posts.
Hardware & Electronics
Any year
32
Macbook charger teardown: surprising complexity inside Apple's power adapter
Have you ever wondered what's inside your Macbook's charger? There's a lot more circuitry crammed into the compact power adapter than you...
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Raspberry Pi 5 has no hardware video encoding and only HEVC decoding
Announcing Raspberry Pi 5, coming in late October: over 2x faster than Raspberry Pi 4, featuring silicon designed in-house at Raspberry Pi.
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SpaceX Raptor: Methane fueled full-flow staged combustion cycle engine
SpaceX's new raptor engine is a methane fueled full flow staged combustion cycle engine and its so hard to develop, no engine like this has ever flown before!Now this topic can be really intimidating so in order to bring the Raptor engine into context, we’re going to do an overview of a few common types of rocket…
35
An Update on AMD Processor Security
The AMD Product Security Incident Response Team (PSIRT) is the focal point for reporting potential product security issues to AMD. AMD PSIRT works with both the AMD internal product security team and the external product security ecosystem, including security researchers, industry peers, government organizations…
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A dozen USB chargers in the lab: Apple is good, but not quite the best (2012)
When you buy a USB charger, how do you know if you're getting a safe, high-quality charger for your money? You can't tell from the outside...
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iPad charger teardown: inside Apple's charger and a risky phony
This article is now available in Turkish iPad şarjının iç yapısı and Chinese [中文翻译版本] Apple iPad原装充电器拆解 . Apple sells their iPad charger...
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Chaos Computer Club breaks Apple TouchID
The biometrics hacking team of the Chaos Computer Club (CCC) has successfully bypassed the biometric security of Apple's TouchID using easy everyday means. A fingerprint of the phone user,...
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ADSL works over wet string (2017)
Broadband services are a wonderful innovation of our time, using multiple frequency bands (hence the name) to carry signals over wires (us...
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Extracting Bitlocker Keys from a TPM
Extracting BitLocker keys sealed with a TPM by sniffing the LPC bus
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Solving the first FSF RYF hurdle for the Librem 5
Purism makes premium phones, laptops, mini PCs and servers running free software on PureOS. Purism products respect people's privacy and freedom while protecting their security.
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Serious Intel CPU bugs (2016)
2015 was a pretty good year for Intel. Their quarterly earnings reports exceeded expectations every quarter. They continue to be the only game in town for the serious server market, which continues to grow exponentially; from the earnings reports of the two largest cloud vendors, we can see that AWS and Azure grew by…
45
Reversing Sinclair's amazing 1974 calculator hack - half the ROM of the HP-35
Register-level simulator of the Sinclair Scientific calculator
46
Dice-O-Matic hopper and elevator (2009)
Introducing the Dice-O-Matic mark II, now generating the die rolls on GamesByEmail.com. It is a 7 foot tall, 104 pound, dice-eating monster, capable of generating 1.3 million rolls a day.
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The Etherkiller (2002)
This led to some general discussion that this particular device really is in a class of devices, now called the "killers", which need to be made.
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Test iOS and Android Audio Latency with Superpowered Latency Test App
iOS and Android Audio Latency Test App with round-trip audio latency data for Apple, Samsung Galaxy, Xiaomi, LG, HTC, Nexus, Motorola, Sony, etc. devices.
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24-core CPU and I can’t move my mouse
This story begins, as they so often do, when I noticed that my machine was behaving poorly. My Windows 10 work machine has 24 cores (48 hyper-threads) and they were 50% idle. It has 64 GB of RAM an…
51
Google supercharges machine learning tasks with TPU custom chip
Machine learning provides the underlying oomph to many of Google’s most-loved applications. In fact, more than 100 teams are currently using machine learning at Google today, from Street View, to Inbox Smart Reply, to voice search.
52
A home-made lithographically-fabricated integrated circuit
I am very excited to announce details of the first homemade integrated circuit and share the journey that this project has taken me on over the past year. I hope that my success will inspire others and help start a revolution in home chip fabrication. When I set out on this project I had no idea of what I had gotten…
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Show HN: How I topped the HuggingFace open LLM leaderboard on two gaming GPUs
ML, Biotech, Hardware, and Coordination Problems. Sometimes I write about hard problems and how to solve them.
54
Homebrew Cray-1A
As part two ( see previous attempt ) of my ongoing series in ‘computational necromancy,’ I’ve spent the last year and a half or so constructing my own 1/10-scale, binary-compatible, cycle-accurate Cray-1. This project falls purely into the “because I can!” category – I was poking around the internet one day looking…
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How MOS 6502 illegal opcodes work
The original NMOS version of the MOS 6502, used in computers like the Commodore 64, the Apple II and the Nintendo Entertainment System (NES), is well-known for its illegal opcodes: Out of 256 possible opcodes, 151 are defined by the architecture, but many of the remaining 105 undefined opcodes do…
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To ECC or Not to ECC
On one of my visits to the Computer History Museum – and by the way this is an absolute must-visit place if you are ever in the San Francisco bay area – I saw an early Google server rack circa 1999 in the exhibits. Not too fancy, right? Maybe even… a
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Time-Nuts -- Precise Time and Frequency for Amateurs
Time-Nuts ™ is a mailing list for amateurs who are interested in precise Time & Frequency. Topics include stability of quartz oscillators, measurements of rubidium and cesium atomic clocks, using WWVB, Loran-C, and GPS for long-term comparisons.
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Farming Hard Drives: How Backblaze Weathered the Thailand Drive Crisis
The rain started in August and by mid-October 2011, violent floods in Thailand had damaged the factories that helped produce nearly half of the world’s
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Panic Blog » The Lightning Digital AV Adapter Surprise
We’ve been doing significant testing lately with video out using various iOS devices for an upcoming project. In doing so, we waded right in the middle of a strange video out mystery. It’s time to unravel that mystery. (Chung-chung!)