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Hillbilly Tracking of Low Earth Orbit Satellites
An adventure of the Southern Appalachian Space Agency, by Travis Goodspeed <travis at radiantmachines.com>, as presented at Summercon 2013...
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The latest blog posts to take off on Hacker News. 3,046 posts.
Hardware & Electronics
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The Raspberry Pi’s Hardware Random Number Generator
Hey! This is a bit old! Things may have changed and I haven’t necessarily fixed them. Most computers can’t create true random numbers. They use a formula which makes a very long stream …
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Tiny, cheap, and dangerous: Inside a fake iPhone charger
Thoughts on the death of Ma Ailun According to reports , a woman in China was tragically electrocuted using her iPhone while it was char...
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Storage for Photographers
There comes a time in every photographer's life when they must ask themselves what to do about all those photo RAWs filling up the tiny-compared-to-spinning-platters SSD on their primary machine.
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Windows Timer Resolution: Megawatts Wasted
The default timer resolution on Windows is 15.6 ms – a timer interrupt 64 times a second. When programs increase the timer frequency they increase power consumption and harm battery life. They also…
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Update on Novena Open Laptop
Back in December, I posted that we’re building an open laptop . The post generated hundreds of comments, and I was surprised there was so much interest.
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How FPGAs work, and why you'll buy one
Today, pretty much everyone has a CPU, a DSP and a GPU, buried somewhere in their PC, phone, car, etc. Most don't know or care that they bought any of these, but they did.
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Google Glass Teardown
Google's latest and hottest gadget needs little introduction. Since its public unveiling in April 2012, the tiny head-mounted Android computer has been collecting controversy and sociological analysis . It is currently available in limited beta to eminent members of the tech community and to a selection of "Glass…
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Build your own Google TV using Raspberry Pi, Node.js and Socket.io
If you’re connecting to your rPi via SSH, you’d have to update your DISPLAY environment variables by issuing
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The $12 Gongkai Phone
Recently, I paid $ 12 at Mingtong Digital Mall for a complete phone, featuring quad-band GSM, Bluetooth, MP3 playback, and an OLED display plus keypad for the UI. Simple, but functional; nothing compared to a smartphone, but useful if you’re going out and worried about getting your primary phone wet or stolen.
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80 FFTs Per Second To Detect Whistles and Switch On Lights
Hey guys As the slightly changed adage goes: a video is worth a thousand words: Interested? Have a look at my tindie page or click below to get more technical details... So, why
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60W equivalent LED bulb uses 9.5W and costs $13
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Connecting an iPad retina LCD to a PC
Update: please read this post This project was born at the Warsaw Hackerspace , it was funded by my friend Spin, who wanted to use the d...
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Linux on an 8-bit micro
Dmitry.GR: A successful experiment in running real Linux on an 8-bit AVR.
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Don't use Linksys routers
Back in 2012 I gave a talk at a conference titled Blended Threats and JavaScript . I demonstrated how anybody could design an internet worm that targeted common network devices like routers and turn them into a powerful botnet that is able to monitor traffic across all types of networks. For the pr
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Making a Physical Product
Jon Paul Wheatley makes products, software, and balls.
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Why is my TI-99/4A in Black and White?
My first computer was a Texas Instruments TI-99/4A. Longtime readers may remember a previous article where we implemented TI-99/4A BASIC as a Scripting Language for modern computers. Recently I got nostalgic for the actual hardware so I got my 99 out of the closet where it had been for a decade o…
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The largest computer ever built
While cold war jets are an old interest of mine, almost everything built to fight the cold war fascinates me. All ages are characterized by madness; only a few have that madness captured in physica…
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How to run an Arduino clone on a 9V battery for weeks or even months
About a year ago, I started building wireless sensors that needed to run on a battery. I quickly found out however that this wasn’t going to be easy: A battery would only last for a few days,…
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Extreme debugging - a tale of microcode and an oven
It's been quite awhile since I debugged a computer program. Too long. Although I miss coding, the thing I miss more is the process of findin...
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How to build a $5 Arduino clone
If you are like me and build projects with Arduino, you must have felt the frustration with ripping your project apart, because you wanted to build something else with that Arduino. I have had the …
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