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I designed a cube that balances itself on a corner
This cube manages to balance itself on a corner, and can simultaneously rotate around its axis in a controlled manner. It does so using clever controls and a set of three reaction wheels.
Topics /
Hardware & Electronics
The most popular blog posts about hardware & electronics on Hacker News. 313 posts.
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MomBoard: E-ink display for a parent with amnesia
Today marks two years since I first set up an e-ink display in my mom’s apartment to help her live on her own with amnesia.
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Air Con: $1697 for an on/off switch
Forcing customers to replace an entire system just because the cheapest component failed might be really profitable, I have no idea… But I do know that it annoyed me enough to make me want to fix it myself. While I understand that what I do next is beyond a large number of Advantage Air customers, in my investigation…
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What's that touchscreen in my room?
Discussion on HackerNews and Lobsters. Roughly a year ago I moved into my new apartment. One of the reasons I picked this apartment was age of the building....
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Apple mobile processors are now made in America by TSMC
[Exclusive] The iPhone maker is ready to be the first client of TSMC's new Arizona fab. Finally, the iPhone will boast a processor that's Made in America
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I designed a Dieter Rams-inspired iPhone dock
Dieter Rams and his friends (Dietrich Lubs and Ludwig Littman) designed many great looking alarm clocks.
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I built an ROV to solve missing person cases
Introduction
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Jailbreaking RabbitOS
Critics unanimously agree that it sucks , and some have accused the company of deliberate deception . Rabbit Inc. reportedly accepts returns, but customers are so eager to get rid of their R1s that even new-in-box units are selling for well below RRP ($200) on secondary markets.
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Controlling the Taylor Swift Eras Tour wristbands with Flipper Zero
Many large concerts feature wristbands that light up on command. They are used to produce varied visual effects across a stadium. One compan...
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The tiny chip that powers Montreal subway tickets
To use the Montreal subway (the Métro), you tap a paper ticket against the turnstile and it opens. The ticket works through a system called ...
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Vision Pro: What we got wrong at Oculus that Apple got right
by Hugo Barra (former Head of Oculus at Meta) Friends and colleagues have been asking me to share my perspective on the Apple Vision Pro as a product. Inspired by my dear friend Matt Mullenweg̵…
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MicroMac, a Macintosh for under £5
This all started from a conversation about the RP2040 MCU, and building a simple desktop/GUI for it. I’d made a comment along the lines of “or, just run some old OS”, and it got me thinking about the original Macintosh .
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I got almost all of my wishes granted with RP2350
Dmitry.GR: Everything you ever dreamed the RP2040 would be is here - fall in love with the RP2350
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Can you get root with only a cigarette lighter?
Before you can write an exploit, you need a bug. When there are no bugs, we have to get creative—that's where Fault Injection comes in. Fault injection can take many forms, including software-controlled data corruption, power glitching, clock glitching, electromagnetic pulses, lasers, and more.
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I like the RP2040
The RP2040 is a microcontroller made by Raspberry Pi. Unlike their more widely known products, the RP2040 is meant to be embedded in consumer electronics. It's cheap and available in tens of thousands for immediate dispatch from your local Mouser.
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Radios, how do they work?
A brief introduction to antennas, superheterodyne receivers, and signal modulation schemes.
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Designing a Lego orrery
Designing a Lego orrery - Personal blog about game development, programming and making
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Inside a $1 radar motion sensor
I recently got some cheap microwave motion sensors, mostly because I was wondering how China managed to make a radar for under a dollar:
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Phased Array Microphone (2023)
A 192-channel phased array microphone, with FPGA data acquisition and beamforming/visualization on the GPU. Phased arrays allow for applications not possible with traditional directional microphones, as the directionality can be changed instantly, after the recording is made, or even be focused at hundreds of…
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Bypassing regulatory locks, hacking AirPods and Faraday cages
How we bypassed Apple's regulatory restrictions, built a Faraday cage and enabled georestricted features on the Airpods Pro 2 for our grandparents.
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Linux/4004: booting Linux on Intel 4004 for fun, art, and no profit
Dmitry.GR: Slowly booting full Linux on the intel 4004 for fun, art, and absolutely no profit
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Intel's Humbling
Intel under Pat Gelsinger is reaping the disaster that came from a lack of investment and execution a decade ago; the company, though, appears to be headed in the right direction, as evidenced by i…
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M4 Mac mini's efficiency
I had to pause some of my work getting a current-gen AMD graphics card running on the Pi 5 and testing a 192-core AmpereOne server to quickly post on the M4's efficiency. I expected M4 to be better than M1/M2 (I haven't personally tested M3), and I hoped it would at least match the previous total-system-power…
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Using an 8K TV as a Monitor
TLDR: If your job is to write code all day or stare at Excel spreadsheets, buy an 8K TV instead of a multi-monitor setup. You can even use the same TV for 4K 120 Hz gaming or watching movies as a bonus!
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Extreme Pi Boot Optimization
🚀 3.5 sec to Linux userspace code
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Hackintosh is almost dead
While I knew about and even tried various very early attempts to run macOS on non-Apple hardware, it wasn’t until early 2020 that I’ve built my first proper one. Then I built several more which are still seeing daily use.
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Inside the Super Nintendo cartridges
One of the remarkable characteristics of the Super Nintendo was the ability for game cartridges (cart) to pack more than instructions and assets into ROM chips. If we open and look at the PCBs, we can find inside things like the CIC copy protection chip, SRAM, and even "enhancement processors".
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The capacitor that Apple soldered incorrectly at the factory
There have been some past rumblings on the internet about a capacitor being installed backwards in Apple’s Macintosh LC III . The LC III was a “pizza box” Mac model produced from early 1993 to early 1994, mainly targeted at the education market. It also manifested as various consumer Performa models: the 450, 460…