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Is Arm ready for server dominance?
AWS announced new servers with Arm-powered Graviton2 processors. How do they stack up vs. x86-powered instances, and is Arm ready for server domination?
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Apple updates its iMac line
Apple today updated its iMac line with up to 9th-generation Intel 8-core processors for the first time and powerful Vega graphics options.
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Running Games on a MacBook Pro with an EGPU
How we got here After Apple released its (soon-to-be) previous generation Mac Pro, it probably didn't take long for them to realize they had a trash can…
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Open Hardware on Its Own Doesn’t Solve the Trust Problem
A few years ago, Sean ‘xobs’ Cross and I built an open-source laptop, Novena, from the circuit boards up, and shared our designs with the world. I’m a strong proponent of open hardware, because sharing knowledge is sharing power. One thing we didn’t anticipate was how much the press wanted to frame our open hardware…
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Why 50 Ohms?
Microwaves101 | Why Fifty Ohms?
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How Radar Works
Radar is one of the most versitile sensors we have to determine what is happening in an environment. Some common applications include air traffic control, weather prediction, automated driver assist, astronomy and terrain mapping. Given that these applications have wildy varying requirements on resolution, range and…
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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…
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My Home Lab Server with 20 Cores / 40 Threads and 128 GB Memory
Update fall 2024 I have decided to decomission this machine and it is no longer in use.
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Open-Source Controller for the IKEA Bekant Standing Desk
Standing desks have become incredibly popular, and for good reason. Sitting for long periods of time can have long-term effects on your health, so if you work at a computer each day, the ability to…
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Raspberry Pi 4 as a USB-C peripheral
I’ve previously blogged about using Pi Zero (and Zero W) devices as USB Gadgets. This allows them to be powered and accessed via one of the micro USB sockets and it shows up as both a CD-Driv…
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New iPad Air and iPad Mini
Apple today introduced the iPad Air in an all new 10.5-inch model, offering the latest innovations and advanced performance at a more affordable price.
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VESA Publishes DisplayPort 2.0 Video Standard
DisplayPort 2.0 enables up to 3X increase in video bandwidth performance (max payload of 77.37 Gbps); new built-in features enable improved user experience, greater flexibility and improved power efficiency SAN JOSE, Calif. – June 26, 2019 – The Video Electronics Standards Association (VESA®) today announced that it…
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Apollo Guidance Computer switching power supply works after 50 years
We recently restored an Apollo Guidance Computer, the revolutionary computer that helped navigate to the Moon and land on its surface. 1 At...
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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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DIY Amps: A Roadmap for Beginners (2017)
So you have decided to take the DIY dive and start building your own headphone amplifiers! If you stick with it, you are going to learn a lot about audio and electronics theory and develop several …
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Is Your Cat 6 Cable a Dog? (2013)
Category 6 cables -- and to a lesser extent, Category 6a cables -- are widely available from a variety of vendors, including variety stores, office supply stores, consumer electronics stores, and online shops. While a great many people are content to run wireless networks in their homes, the fact is that if you need…
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Glass Enterprise Edition 2
We’re launching Glass Enterprise Edition 2 to help businesses work better, smarter and faster.
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Tokyo mechanical keyboard meetup photos
Last sunny Saturday, there was the biggest keyboard mee…
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California Earthquakes Disrupted HF Propagation on West Coast
The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.
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Running an eInk Display with Elixir, Scenic and Nerves
So I've been curious about what kinds of displays you can connect to the Pi-series single board computers for a while. I happened to accidentally order a few. Among others an eInk display. I ordered the PaPiRus ePaper. It ended up being dead on arrival and then out of stock so I received an Inky to replace it. Fair…
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Bitcoin mining on an Apollo Guidance Computer
We've been restoring an Apollo Guidance Computer 1 . Now that we have the world's only working AGC, I decided to write some code for it. Try...
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Logitech MX Master 3 vs. 2S Teardown
The Logitech MX Master series of mice is a favorite among the Bolt team. They’re consistently rated as top of the pack among graphic designers, engineering design professionals and everyday users who are looking for a solid wireless mouse. While they aren’t ideal for gaming, they’re well-suited for
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