Author Archives: e8johan

A Bone to the Beagle

Posted on November 11, 2011 by e8johan

The BeagleBoard project is bringing a new board to the world. The low-cost BeagleBone board will provide Arm power to the embedded community. It boasts a 700MHz Cortex-A8, 256MB of RAM, Ethernet and USB, but also headers just like the … Continue reading →

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BeRTOS

Posted on November 9, 2011 by e8johan

BeRTOS is an open source real-time kernel, coupled with drivers and code modules for various common tasks. The target is small systems – BeRTOS can even be used with Arduino. It is being developed by the Italian company Develer. Targets are AVR, Arm7 … Continue reading →

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Uzebox – an 8-bit Gaming Console

Posted on November 7, 2011 by e8johan

The Uzebox is an old school gaming console hardware designed for today’s hobbyists. It is based around an ATmega MCU and an RGB-to-NTSC (or PAL) converter chip. The system has 4kB of RAM and 64kB of FLASH. The system can … Continue reading →

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Classic Auction in one Month

Posted on November 4, 2011 by e8johan

In one month time, December 3rd, Elektroteknologsektionens Teletekniska Avdelning, ETA, of Chalmers University of Technology , my alma mater, will host their annual auction. Being based in western Sweden, this auktion is a must. Instruments, components, computers, etc – both in … Continue reading →

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Summarizing 3D Printing

Posted on November 2, 2011 by e8johan

Over the last weeks, we have been looking at 3D printing. From the origins in the RepRap project, through various commercially available kits. We’ve also been looking at the work flow involved, as well as the tools and sites.

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Korg Monotron Schematics

Posted on October 31, 2011 by e8johan

The KORG Monotron is an old school analog synthesizer in a portable format. Sporting a VCO, LFO and VCF, i.e. a voltage controlled oscillator, a low frequency oscillator and a voltage controlled filter, it sports all the components needed to create the sounds … Continue reading →

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Retro AVR Computer

Posted on October 28, 2011 by e8johan

Mark Wilson has recreated the classic KENBAK computer using an AVR and some support electronics. This not only brings back a classic computer in a modern form, it provides a computer basic enough to be fully understood in a few hours. … Continue reading →

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Finding Models

Posted on October 26, 2011 by e8johan

The site Thingiverse is a great source for 3D printable models – and open source designs in general. The site is run by MakerBot Industries, but the contents is in no way tied to the MakerBot 3D Printer. Instead, the … Continue reading →

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Data Alignment

Posted on October 21, 2011 by e8johan

When working in C, you will sooner or later use structs. This is a very handy construction, but it has hidden pitfalls. One of them shows up when the sizeof your structure changes. Why is that so? It all comes … Continue reading →

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Modelling On-line

Posted on October 19, 2011 by e8johan

Modelling 3D graphics is as much about the tools, as about the talent of the designer. In one end of the spectrum, the likes of SolidWorks are found. In another corner, the more programatic approach of OpenSCAD is found attractive. … Continue reading →

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