Make03_2005: DIY - Design

Make03_2005: DIY - Design
Pdf | 6 pgs | 2 mb

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The Night Lighter 36

The Night Lighter 36
William Gurstelle | Make Vol. 03 - 2005 | Pdf | 11 pgs | 3 mb

Launch potato projectiles 200+ yards with this stun-gun triggered, high-powered potato cannon with see-thru action (Good thing potatoes are biodegradable).

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Mousey the Junkbot

Mousey the Junkbot
Gareth Branwyn | Make Vol. 02 - 2005 | Pdf | 14 pgs | 3 mb

THE FINE ART OF MAKING "FRANKENMICE"

This project turns an analog computer mouse into a robot that'll delight friends and wow workmates down on the cube farm. Mousey's behavior is fittingly mouse-like. It scoots quickly across the floor, thanks to lively little motors. And when the critter crashes into anything, it speeds off in the opposite direction.

The robot's "brains" are an ingenious hack based on an audio operational amplifier (op-amp), an 8-pin chip that's normally used to drive answering machine speakers and other lo-fi equipment. Following Randy Sargent's pioneering design (see page 102 , Mousey repurposes this chip to boost light-sensor input to motor-powerable levels. The result is simple, fast-reacting analog circuitry that fits inside a mouse case.

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Making Biodiesel

Making Biodiesel
Rob Elam | Make Vol. 03 - 2005 | Pdf | 9 pgs | 2 mb

It's easy to make a small batch of biodiesel that will work in any diesel engine. You don't need any special equipment - an old juice bottle wilI serve as the "reactor" vessel - and on such a small scale you can quickly refine your technique and perform further experiments. After a few liters' worth of experience, you'll know if you've been bitten by the biodiesel bug.

The principle behind biodieseling is to take vegetable oil (either new or used), and process it into a fuel that's thin enough to spray from a regular diesel engine's fuel-injection system. This is done chemically, by converting the oil into two types of compounds: biodiesel, which shares the original oil's combustibility, and glycerin, which retains the oil's thick, viscous properties. Drain away the glycerin, and you're left with a fuel that you can pour into any diesel vehicle with no further modification.

Once you get to the far side of the learning curve, making biodiesel is very much like cooking. In fact, a commercial biodiesel production plant shares more in common with a large-scale bakery than a petroleum refinery. There's organic chemistry involved in baking a cake, but most bakers wouIdn't consider themselves organic chemists.
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Pocket Atlas of Sectional Anatomy

Pocket Atlas of Sectional Anatomy
Thieme | ISBN 13: 978-1-58890-475-1 | Pdf | 274 pgs | 22 mb

This book presents the basic anatomy needed to interpret modern sectional images.

In making a diagnosis from sectional images, even experienced diagnosticians must adapt their thinking to the sectional portrayal of anatomic features. The Pocket Atlas of Sectional Anatomy aims to facilitate this process by presenting the two modalities that have the greatest practical importance in modern sectional imaging: computed tomography and magnetic resonance imaging.

The importance of these modalities rests partly on their high resolution. So many of the images were produced with 3-tesla instruments. We wish to express our gratitude to the manufacturers, Siemens and Philips.

We have attempted to provide vivid, comprehensive coverage of sectional anatomic details while still making the book compact and easy to use. The four-color illustrations were considered an essential part of this goal to maintain clarity despite the quantity of information.
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Atari 2600 PC

Atari 2600 PC
Joe Grand | Make Vol. 02 - 2005 | Pdf | 37 pgs | 7 mb

UPGRADING NOSTALGIA WITH THE ATARI 2600PC

I'm a historian of retro videogame systems and enjoy playing games on many different systems. I have a personal connection to the Atari 2600, which is probably related to my nostalgia for growing up with one. From an engineering perspective, the design of the Atari 2600 hardware is both simple and complex - yin and yang, so to speak - and it has enticed me for many years.

The goal of this project is to cram a full-featured PC system into a retro Atari 2600 videogame case. Not only is this a real challenge, but it's extremely rewarding.
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