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The latest blog posts to take off on Hacker News. 298 posts.
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Solar Powered Raspberry Pi Camera
https://www.youtube.com/watch?v=M53eJI90ETE Update: this project was featured in issue 92 of the official Raspberry Pi magazine (download as PDF, buy the issue or subscribe). SSH-ing into a remote solar powered Raspberry Pi at the top of an apple tree has a special feeling -- almost like commanding a spaceship where…
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AMD EPYC processors come to Google, and to Google Cloud
Google is using the new 2nd Gen AMD EPYC processor for its own workloads, and will offer VMs based on the chip to Google Cloud customers.
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USB-C Easy Bake Oven (2017)
I modified an Easy Bake Oven to run off USB-C. The obvious question is "Why?", but I prefer to ask, "Why Not?". The USB-C spec allows for 100 Watts of power to be transferred through the connector, and that is the power rating for the oven, so it should work.
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How to Measure Indoor Air Quality with a Raspberry Pi, RuuviTags and PMS7003
Learn how to build an air quality monitoring device with a PMS7003 sensor, Raspberry Pi and some Java code. Help raise awareness about air pollution.
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A Guide to Recording 660FPS Video on a $6 Raspberry Pi Camera
This article will discuss the setup steps that are required for recording videos at high frame rates on cheap Raspberry Pi cameras. Frame rates up to 660FPS on the V1 camera and up to 1007 on the V2 camera can be achieved. Filming at these extremely high frame rates on a Raspberry Pi is much more challenging and…
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Turning a MacBook into a Touchscreen with $1 of Hardware (2018)
We turned a MacBook into a touchscreen using only $1 of hardware and a little bit of computer vision.
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Casting Glass from 3D Printed Molds
31 Jul 2019 | self-Amos , glass art , kiln casting , fabrication , kilncasting , lost-resin , lost-wax
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Disassembling the Sony FE 135mm F/1.8 GM
When we optically tested the Sony FE 135mm f/1.8 GM we were mighty impressed. Then I threw up in my mouth a little when I read a couple of reviewers comment on the build quality. Because holding a…
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Open Source Hardware Hearing Aid Part 1
My mother got hearing aids a few years ago. About a month later, she lost one. Insurance said if she wanted a replacement, she could pay them many thousands of dollars or she could wait a year.
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Cartoons in Tektronix Schematics
Explore Tektronix schematic cartoons with vintageTEK. Discover hidden humorous drawings in manuals and schematics from classic Tektronix gear.
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A Raspberry Pi-powered live train station sign
Build your own UK train station platform departure display (next train indicator) with live data using a Raspberry Pi Zero and balena.
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Ray tracing with uLisp
This is a simple ray tracer written in uLisp, using the uLisp graphics extensions to plot on a colour TFT display. The scene contains five spheres and a plane and can be run on any of the following boards that include an integral TFT display:
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LoRaWAN distance world record broken twice: 766km using 25mW power
After almost 2 years, the world record of 702 km (436 miles) has been broken. Not once but twice. For a long time this record which was set on 26th of August 20
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Librem 5 Smartphone Final Specs
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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Raspberry Pi Model Railway Automation
This note introduces my experiences of using the Raspberry Pi to automate a model railway.
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Raspberry Pi microSD follow-up, SD Association fools me twice?
/ Fool me once, shame on you. Fool me twice, \ \ prepare to die. (Klingon Proverb) / -------------------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || (Excerpt from Ansible for DevOps, chapter 12.) The fallout from this year's microSD card performance comparison has turned into quite a…
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Retro 5″ Black and White TV as a computer monitor – A tale of pointlessness
The convoluted and ultimately pointless tale of how I connected a retro 80s 5" BW TV to my PC as a 3rd monitor
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A2-class microSD cards offer no better performance for the Raspberry Pi
Update: See follow-up post about A1 vs A2 performance, Raspberry Pi microSD follow-up, SD Association fools me twice?. After I published my 2019 Raspberry Pi microSD card performance comparison, I received a lot of feedback about newer 'A2' Application Performance class microSD cards, and how they could produce even…
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How Computers Boot Up (2008)
The previous post described [motherboards and the memory map] memory-map in Intel computers to set the scene for the initial phases of boot. Booting is an involved, hacky, multi-stage affair - fun st
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Adventures Building a Self-Driving RC Car
Having read some amazing books on Machine Learning, I had been looking for opportunities to apply ML from first principles in the real world. That was what got me curious about the wonderful Donkey Car project. The project is essentially a how-to guide to building your own RC car which can drive itself around a track…
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Powering a Mainframe
The last few days have been eventful. I was contacted by the datacenter that the mainframe's cage is now ready for moving in, and the power ...
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The Raspberry Pi 4 needs a fan
December 2020 Update: Lo and behold, the Pi Foundation tacitly acknowledges the Pi needs a fan in the official case, because now they sell the Case Fan! The Raspberry Pi Foundation's Pi 4 announcement blog post touted the Pi 4 as providing "PC-like level of performance for most users". The Foundation even offers a…
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How many kinds of USB-C to USB-C cables are there?
tl;dr: There are 6, it's unfortunately very confusing to the end user. Classic USB from the 1.1, 2.0, to 3.0 generations using USB-A and...
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Artificial “muscles” achieve powerful pulling force
MIT researchers have created a fiber-based, lightweight, fast-acting artificial muscle that could be useful for robotics and for prosthetics.
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QCSuper: A tool for capturing 2G/3G/4G air traffic on Qualcomm-based phones
QCSuper, an open-source tool, helps capture mobile network frames from Qualcomm-based Android devices, enabling analysis in Wireshark and more.
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Playing with a Raspberry Pi 4 64-bit
Lightweight virtualization is a natural fit for low power devices and, so, seeing that the extremely popular Raspberry Pi line got an upgrade, we were very keen on trying the newly released Raspberry Pi 4 model B. Getting the board up and running with a 64bit kernel (and a 64bit userland) proved to be kind of a…