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I've never seen a trailer like this - perhaps it wasn't road safe or something, but it would be wonderful to (re)make - via LoL.
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The Lost Knowledge column explores the possible technology of the future in the forgotten ideas of the past (and those just slightly off to the side). Every other Wednesday, we look at retro-tech, "lost" technology, and the make-do, improvised "street tech" of village artisans and tradespeople from around the globe. "Lost Knowledge" was also the theme of MAKE Volume 17
Ever since we humans started making shadow puppets in the firelight of our caves, we've been fascinated by the power of the projected image. It seems only fitting that, for DIY Movie Making Month, we'd take a look at magic lanterns, some of our first technological baby steps that have delivered us to the age of Avatar.
What is a magic lantern? It's basically a 17th century pre-cursor to the slide, and then movie, projector. The Magic Lantern Society defines a magic lantern as:
...an appliance by means of which transparencies are projected by artificial light upon a screen with the projected image having a diameter generally from thirty to eighty times greater than that of the transparency or slide, whilst the area of the image may be from one thousand to six thousand times as great.
Magic lanterns grew on the developments of magic shadow shows (i.e. shadow puppets), camera obscura, magic mirrors, and other earlier optics and projection techniques. The period of the magic lantern spanned from the mid-17th century to the late 19th. While there is no clear inventor of the device, Dutch astronomer, mathematician, and physicist, Christiaan Huygens (1629-1695), with his lenses designed for use in telescopes, is probably the closest thing to a father of the technology.
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For portable radio operation, I like End-Fed Half-Wavelength Antennas (EFHWA, pronounced "EF-WAH"). This type of antenna is similar to the common half-wavelength dipole, but with one significant advantage. A dipole has its feedpoint (where it connects to the radio) in the middle of the antenna, but an EFHWA's feedpoint is at one end. This makes it very convenient to throw the antenna up in a tree and connect the bottom of it to your radio. Here are instructions for making a multiband end-fed half-wavelength antenna that works on 17, 20, 30, and 40-meter bands.
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From user Meph over at the always-entertaining There, I Fixed It.
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Here's a neat idea for a tablecloth, by Kristine Bjaadal. Normally, one would avoid spilling things on their linens, however the Underfull Tablecloth has a hidden pattern built in that only shows up once it becomes stained. Now you can look at that lovely butterfly pattern and remember that one time you had a bit too much wine, without feeling bad about having ruined the tablecloth! [via neatorama]
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Makers Market seller Kevin of kaitrees has a bunch of great videos on his market blog. They range from details of the pieces themselves, to "slap tests", and works in progress. It's a neat look at the process that goes into making these pieces.
My sculptures are an effort to distill what real trees inspire in people into something one can have inside their living or working space.
This tree in the video above will require about 500 hours to complete, stand over 7 feet tall, and will use about 1000 strands of aluminum wire. It's his largest piece to date, and looks Amazing! I wonder how much it will weigh?
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In this series, "Letters from the Fab Academy," Shawn Wallace, member of AS220, the Providence, RI community arts space, shares his experiences with the Fab Academy, a distributed learning collaborative, built on the infrastructure of the Fab Lab network. -- Gareth
3D Scanning
By Shawn Wallace
Victor Freundt prints a project using the ZCorp printer at the Barcelona Fab Lab.
When working with 3D scanning and printing equipment, it quickly becomes apparent that objects are nowhere near as fungible as MP3s. We'll have to wait a while for the day when every teenager is capable of casually copying real-world objects. However, it is surprisingly easy to hack together a crude 3D scanner from commodity cameras, projectors, and hardware you probably have in a couple of junk drawers in your shop.
A good place to start is with the Modela mini mill, which has a piezo-based needle sensor attachment that can be used for scanning small objects. The machine records the plunge depth at the point it contacts the object and the software that comes with the Modela (Dr. Picza) converts these points into a 3D mesh. Here's an example of using Dr. Picza to scan a small shell from Benito Juarez from the Barcelona Fab Academy site:
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Kügli is an Arduino-controlled musical instrument by Stefanie Hess and Johannes Schmidt. The project consists of a bowl with a false bottom, packing an Arduino, XBee wireless module, and some speakers. The ball contains a Lilypad and another XBee.
The spacing and dynamic of a ball in a bowl influences sound. While holding the bowl in its hands the player can walk around and rock the bowl forth and back either smoothly or with fast movements. Two factors are relevant for the sound: the position of the Kügli in the ball and the rotation-speed of the Kügli. Both data streams are sent to Max/Msp via the serial port. The XBee component, accelerator and piezo-microphones are sensoring and passing the the movements.
In the Maker Shed:
Deluxe Make: Electronics Toolkit
Our Price: $124.99
Do you want to learn the fundamentals of electronics in a fun and experiential way? Not sure where to start, or what tools you might need? We've taken care of all the questions with our deluxe tool kit from the Maker Shed, featuring our best-selling book, Make: Electronics. Read more | Permalink | Comments | Read more articles in Arduino | Digg this!
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An anonymous MAKE subscriber writes in to let us know about this very cool wireless robotics platform based on the Arduino and an XBee. The purpose of the project was to teach their 9-year old son about programming in Processing. What a great way to introduce programming to kids!
I built a wireless robotics platform from a cheap R/C car, an Arduino with XBee shield, small microswitch sensors, and a Processing program running on a remote computer to control the vehicle. The vehicle is completely controlled by the code running on the remote computer which allows very rapid prototyping of the code to tell the vehicle what to do and how to react to the sensor events received from the vehicle. I'm hoping this is a good way to teach my 9-year old son about programming.
In the Maker Shed:
The Maker Shed has everything you need to get started with Arduino
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Enjoy playing rock, paper, scissors, but having trouble finding worthy opponents to play it with? Need to improve your game for that upcoming world tournament? Well, then, you will certainly appreciate Steve Hoefer's rock paper scissors playing glove. Thanks to the built-in accelerometer and bend sensors, all you have to do to play is play the game, and the computer will tell you what it's move was, and keep track of who won. It's a funny project, and it includes some cool features, such as using edge-lit plastic for the display. Well done!
More:
- DIY Rock paper scissors electronic game
- HOW TO - Beat anyone at Rock Paper Scissors
- Rock, Paper, Scissors - interview with a professional player
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