Sabtu, November 14, 2009

VoIPing the iPod Touch


VoIPing the iPod Touch
How makers gave you the feature that Apple held back
Erica Sadun | Make Vol. 15- 2008 | Pdf | 2 pgs | 1 mb

It's a maker's dream: turn your homebrew ideas
into a concrete reality and then ship that product.
This dream came true for iPod hackers Dr. Marian
Kepesi, "Eok," and Samuel Vinson. They designed,
built, and shipped an iPod touch microphone and
developed VolP(voice over internet protocol) soft-
ware to place phone calls using that mic.

Last November, Kepesi was poking around on his
iPod Touch. A postdoc at Austria's Graz University
of Technology, he had previously worked with third-
generation iPods and was interested in the new
Touch line.

During his explorations, he discovered an impor-
tant fact about the iPod Touch's bottom connector
port: its line-in audio was active. Live pins meant
that the iPod Touch could connect to an external
audio source. It was compatible with recording or,
better yet, with VolP for talking over the internet.
VoIP compatibility was a long-standing goal of the
iPhone and iPod Touch hacker community.
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The Penetrating Magnets Illusion


The Penetrating Magnets Illusion
"Magnets are fascinating things, and they behave in
unexpected ways. I will show you a little-known
property of magnets, which actually allows them to
pass through one another."
Donald Simanek | Make Vol. 15- 2008 | Pdf | 2 pgs | 1 mb

Back in 2004, I invented a physics toy using
magnets, one I hadn't seen described elsewhere.
So I called it Simanek's Penetrating Magnet Illusion.
It obeys Newton's laws, like the others, but why
should Newton get all the credit?

This toy is inexpensive and absurdly easy to build.
Find a dozen small, flat ceramic magnets, 1" diameter,
1/4" thick, with a 3/8" hole in the center. You can get
them at RadioShack or hardware stores. You don't
need a full dozen, but extras are good to have.
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Great Balls of Fire!


Great Balls of Fire!
Keith Hammond | Make Vol. 16- 2008 | Pdf | 5 pgs | 2 mb
It's true: chemistry sets today don't measure up
to the classic kits that once scorched Formica
kitchen tables across the nation. But you can
still find respectable kits if you know where to look.
More importantly, anyone can make their own flam-
ing, fuming, booming DIY chemistry set as good as
those from the golden age - or better.
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Jumat, November 13, 2009

The Amazing Seebeck Generator


The Amazing Seebeck Generator
Andrew Lewis | Make Vol. 15- 2008 | Pdf | 9 pgs | 3 mb
FLAME ON
With no moving parts, this simple energy-recycling
generator scavenges waste heat from a candle and turns
it into usable electricity.

Peltier cells are flat devices that draw heat from one side
to the other through a thermoelectric principle called the
Peltier effect. The cells are commonly used to pump heat
away from CPUs or graphics cards, and are also found
in camping coolers and heaters. The Amazing Seebeck
Generator uses one of these devices in reverse, to turn a
heat differential into electricity, rather than using electricity to produce a heat differential.
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Compressed Air Rocket


Compressed Air Rocket
Rick Schertle | Make Vol. 15- 2008 | Pdf | 13 pgs | 4 mb
PAPER, TAPE, COMPRESSED AIR... LIFT-OFF!
Blow your friends away as you send this 25-cent
rocket hundreds of feet in the air. You can build this
easy launcher and rocket with common hardware store
items in an afternoon.

All the parts for this simple but impressive air rocket and
launcher are cheap and easy to find. Building it is a breeze
and the modifications are endless. It's legal in a big city,
reusable, clean, and can be launched even in high winds
on a small field.

Believe me, folks are quite taken by the 200- to 300-foot
flights fueled by 18 or so bicycle pumps of compressed air.
Whether you're launching on your own or with a whole
group of rocketeers, watch the crowds gather ... 3,2,1,
and away!
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The Year People Learned to Fly


The Year People Learned to Fly
Celebrating the 30th anniversary of the flight of the Gossamer Condor
Ben Shedd | Make Vol. 11- 2007 | Pdf | 3 pgs | 1 mb
One of the great home-built family maker projects
celebrated its 30th anniversary on Aug. 23, 2007:
the flight of the world's first truly successful
human-powered airplane, the Gossamer Condor.

The plane was designed and built by Dr. Paul B.
MacCready, along with his family and friends, on
weekends over a year's time in 1976-77. The goal
was to win the first Kremer Prize, a $100.000
reward for the first human-powered airplane that
could take off using human power, fly over a 10-foot
marker, make a complete left turn and right turn
around two pylons spaced half a mile apart, and
then fly over the 10-foot marker again at the end
of the mile-long flight.
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Kamis, November 12, 2009

The Little Cart That Couldn't


The Little Cart That Couldn't
Wind-powered vehicle claims look like hot air
Charles Platt | Make Vol. 11- 2007 | Pdf | 7 pgs | 2 mb
Can a wind-driven vehicle outrun a tailwind? A Florida tinkerer named
Jack Goodman claims it can, and he put a video on YouTube to prove it. Some
sailing enthusiasts became convinced that he was on to something, while
others were equally sure it was a hoax - and I decided to put it to the test.
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The iConveyor


The iConveyor
John Edgar Park | Make Vol. 15- 2008 | Pdf | 6 pgs | 2 mb
The iConveyor is a simple motorized conveyer
belt with an RFID (radio frequency identification)
reader under the belt. It lets you visit websites
or load applications on your computer by simply
dropping a chip in the belt. Each wooden chip
has an RFID tag attached to it. The reader picks
up the unique ID number of the tag and sends
the number to your personal computer, through
a cable. A computer program written for the
iConveyor looks up the name of the website or
application assigned to the ID number and loads it.

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Vortex Cannons


Vortex Cannons
Edwin Wise | Make Vol. 15- 2008 | Pdf | 9 pgs | 3 mb
DOING DONUTS
A smoke ring, or vortex, is a beguiling thing to watch:
a coherent, moving structure made out of thin air. Here
are 3 cannons that can throw these "chunks of air"
across a room.

I'd been aware of vortex cannons for quite some time,
mostly as an interesting toy, and after I kept stumbling on
the concept while touring the web, I decided I had to build
my own. There's something fascinating about taking a
substance as ubiquitous and amorphous as air and trans-
forming it into a coherent and persistent structure, almost
like a crystal. I also hoped to find some use for my cannon,
perhaps to propel scents or give the touch of a ghost in
a haunted house.
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Rabu, November 11, 2009

Make Vol. 15- 2008: Music


Make Vol. 15- 2008: Music
Pdf | 40 pgs | 13 mb

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Spin the Birdie


Spin the Birdie
Larry Cotton| Make Vol. 11- 2007 | Pdf | 11 pgs | 4 mb
BIRD SHOT
Birds make lousy subjects for digital
photographs. They're fearful, fidgety,
and, well, flighty. But you can improve
your odds of getting awesome avian
photos by moving your camera closer
to the birds --- and you farther away.
And while you're at it, why not get
them to pose for you?
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U-G-L-Y Your Bike


U-G-L-Y Your Bike
To deter thieves, camouflage your bicycle as a piece of
crap while keeping it a first-class ride
Rick Polito | Make Vol. 11- 2007 | Pdf | pgs | mb
Nature is the master of disguise. The tiger swallowtail caterpillar starts out camouflaged as a bird dropping to discourage hungry birds. Take a tip from the crawling turd and keep your bike from getting swiped: dress it down as a pile of rolling junk.

Having an ugly bike doesn't mean having a junky bike. Looks and performance have no exclusive relationship. A savvy bike thief may see the gem under the Krylon, but he also knows he can't sell it as quickly as the tricked-out speedster at the other end of the bike rack.
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Selasa, November 10, 2009

Bend It Like Bach


Bend It Like Bach
Tim Kaiser's fabulously weird world of music
Karen K. Hanseb| Make Vol. 15- 2008 | Pdf | 5 pgs | 2 mb
When English soccer star David Beckham bends the
ball, the international sports world watches in awe. When
American musician Tim Kaiser bends a circuit, the audi-
ence listens just as intently, be it in an art or performance
space, or a bar, bookstore, or library.

MAKE, Volume 12 (page 14) introduced readers
to Tim Kaiser, but even people who've never
heard of him have probably heard his sounds.
These may emanate from the instruments
Kaiser himself creates and plays, such as
Bungee Drums made from concrete post forms
or the New Metal Violin made out of the battery
compartment of a minesweeper. Or they may
issue forth as distorted or modulated samples
from one of Kaiser's Atomic SonicFX Boxes in the
hands of other artists.

Among those emitting Kaiser sounds are
Duran Duran and film score producer BT (Brian
Transeau), who recently featured some of
Kaiser's instruments in his recording This
Binary Universe.
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Make Vol. 15- 2008: Upload


Make Vol. 15- 2008: Upload
Pdf | 8 pgs | 3 mb

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Senin, November 09, 2009

Evil Mouse Prank


Evil Mouse Prank
Control your co-worker's cursor!
John Edgar Park | Make Vol. 15- 2008 | Pdf | 2 pgs | 1 mb
Joe Bowers is sneaky, resourceful, and rotten to
the core. Whatever you do, don't get in a prank war
with him.

Returning to my desk from a coffee break. I sat
down, grabbed my mouse. and ... nothing. The
cursor was stuck to the left wall of my monitor.
I shook my mouse wildly. The cursor moved up
and down just fine. But when I jerked my mouse
viciously to the right, the cursor nudged a little,
then slammed back to its new favorite position,
clinging maddeningly to the leftmost pixel.

Blowing on the mouse's nether regions didn't help,
so my officemate, Hide Yosumi, took pity on me. "Do
you hear something?" he asked knowingly. There
was a high-pitched whine coming from behind my
workstation. I looked and saw that a strange mouse
was plugged in. Not just any mouse. A prank mouse.
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Mister Jalopy's Urban Guerrilla Movie House


Mister Jalopy's Urban Guerrilla Movie House
Your own DIY drive-in
Mister Jalopy | Make Vol. 11- 2007 | Pdf | 11 pgs | 3 mb
Rather than lamenting the slow death of
drive-in theaters, I decided to build my
own, mount it on an adult tricycle, and
take the movies anywhere there's an AC
outlet. Vibrant online communities of DIY
projector enthusiasts have ironed out the
kinks and built the focal calculator soft-
ware tools, and they're building homebrew
machines with jaw-dropping results.
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Plush Irradiated Sirloin


Plush Irradiated Sirloin
Microcontroller night light illuminates meaty issues
Rebecca Stern | Make Vol. 11- 2007 | Pdf | 2 pgs | 1 mb
Faced with an assignment to make a plush night
light. I thought, "Why light?" and brainstormed
reasons for a stuffed toy to light up. In a glowworm
toy, for instance, the light mimics nature. I'd been
reading Michael Pollan's The Omnivore's Dilemma,
and this got me thinking about the chain of refrig-
eration, labor, and irradiation involved in American
beef production. So I thought. glowing irradiated
meat! I know that irradiated meat doesn't glow, and
neither does toxic waste unless it's in a cartoon, but
plush toys typically represent cartoon characters
anyway, so it made sense: Plush Irradiated Sirloin.
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On Batteries


On Batteries
How to decide which batteries will run your project best
Limor Fried | Make Vol. 11- 2007 | Pdf | 3 pgs | 1 mb
If knowledge is power, then knowledge of batteries
is power squared! Here's what I know about dispos-
able and rechargeable batteries and their tradeoffs.
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Granny's Nightmare Chopper Bike


Granny's Nightmare Chopper Bike
Chop an old ladies' bicycle into something evil
Brad Graham | Make Vol. 11- 2007 | Pdf | 6 pgs | 2 mb
You know what irritates me? I drive out to the dump, pay my five bucks to get in, and the only bikes laying around are those goofy granny bikes from the late 1970s. OK - enough whining - a real chopper artist can chop any bike, even
a crusty old codger cruiser.

Here's how I hacked and welded a granny bike into something evil. Normally, I wouldn't even bother with a bike like this because it has a lugged frame. This means that the head tube and bottom bracket are just press-fit and brazed into place, rather than welded. You can't salvage lugged joints for most projects because they have holes where the tubing fits together, and brazing filler metal interferes with arc welding. But this project was doable as long as I kept most of the frame intact.
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