d20 Handbag of Holding: How to build it

D20 instrux b25

By popular request following the d12 bag, here it is: the d20 bag! Now you can make your very own icosahedron.


d20 small and large

We’re making a pattern and kit for this project available in two sizes: darling and practical. The tiny one is just over three inches tall, and holds little things for you. The larger size is about five inches tall and will fit your phone, wallet and keys along with your dice.


Continue reading d20 Handbag of Holding: How to build it

Linkdump: July 2009

Version 1.1 of the ‘2313 board

2313_topside2
We’ve just revved our open-source ATtiny2313 breakout boards to version 1.1.
There are a couple of nice improvements for the new version. First, we made the board single sided to match our original ATmegaxx8 board– this means that it’s relatively easy to print out the layer separations and make your own at home, if you like to etch your own boards. We also changed around the configuration of the prototyping areas, making it so that you can now fit up to two DIP-8 packages, breadboard style, on the board.
Continue reading Version 1.1 of the ‘2313 board

Links on the road to TGIMBOEJ

As they sign up for the TGIMBOEJ project, we’ve been asking participants to publish a link to their web site.

Skimming through the lists, we’ve come across quite a few interesting and entertaining projects, sites, photos, and other links, both old and new.
Here are just a few of our favorites:

TGIMBOEJ: One year later

TGIMBOEJ - new logo
One of the big projects that we launched in 2008 is The Great Internet Migratory Box Of Electronics Junk, a pay-it-forward style hardware sharing program for electronics.

Since our original article, TGIMBOEJ (pronounced Tig-Ihm-Boh-Edge) has somewhat taken on a life of its own. In that article, we set up simple guidelines for how to pass the box along, and in the interim we have taken a “laissez-faire” approach, watching and learning from the successes and troubles with that model.

Our mostly-hands-off approach to supervising TGIMBOEJ has worked remarkably well in some respects. There are upwards of 40 circulating boxes now, which have passed through hundreds of hands. And, hundreds of other people have signed up on our wiki site tgimboej.org as potential recipients.

On the down side, the mean free path of many of the boxes has been far too short– some have made it just one hop before stopping.

In talking to folks about the boxes that got stuck, we identified three main stories (all of which point us towards fairly obvious solutions):

1: “I sent it to some guy, but I haven’t heard anything since then.”
2: “Oh yeah– I’ve been meaning to ship it for some time.”
3: “I got this box and I don’t know what to do with it.”

So now, it’s time to get serious. First, we’ve been contacting the last known recipients of the stalled boxes, and trying to get more of the existing boxes back into circulation. Second, we’re relaunching the tgimboej.org wiki site with a wholly new set of participation instructions and procedures.

To keep boxes in circulation longer, we’re now encouraging that boxes should be sent to people who have specifically requested to participate— i.e., people who are familiar with how the project works. We’ve also introduced language in the revised instructions that will guide participants to keep an eye on their box, even after it leaves their hands.

To further alleviate the potential problem of people ending up with boxes but not knowing what to do with them, we’re standardizing the printed materials that go into each new box.

TGIMBOEJ Forms -- low res

Gone are the cute but scrawled little notebooks, replaced by two neat PDF forms– one to log the progress of the box, and the other with detailed instructions on how to participate.

Finally, we’re launching eight new TGIMBOEJ boxes this week, which — along with the others that are coming back into circulation — will help to increase the number and rate of box exchanges.

So now it’s your turn. If you would enjoy trading electronics with like-minded individuals, this is becoming a great time to participate in The Great Internet Migratory Box Of Electronics Junk.

To get started, please read about how it works on the TGIMBOEJ wiki, and if you’re game, add your name to the list of Box Requests.

Precision in packaging

Szechuan peppercorns


Sichuan peppercorns, oh yeah! Raven of Made with Molecules after eating them wrote, “There’s a war in my mouth.” They create a riot of numbing and tingling sensations, particularly if you can get relatively fresh ones (i.e. not stale from sitting around in a Whole Foods bulk bin). Raven links to an abstract about the particular anesthetic-sensitive potassium channels inhibited by hydroxy-alpha-sanshool, one of the components of sichuan peppercorns that make them so exciting.


Science aside, we recently found some in a local asian grocery store, and were particularly struck by the packaging. American packaging often has annoying disclaimers about how contents are packed by weight and may have settled. These peppercorns were not only weighed, but the precision of the scale is indicated! If only all packaging was so straightforward. I was going to complain that the package doesn’t say what kind of peppercorns were inside (sichuan peppercorns are not related to other peppercorns) but then realized that the Chinese characters are specific to these “flower peppers” even if the English words are more general. In any case, the reddish husks are recognizable through the bag.

Meggy Jr RGB Twitter Reader

MeggyTwit - 1
We’ve turned Meggy Jr RGB into a multicolor scrolling LED twitter reader. It’s a handy external ambient data device that displays things recently written by your friends on twitter.

This project was inspired in part by the excellent Twitter LED Scroller by David Nichols. The big idea is that we use a host computer to run a Processing application, which periodically checks Twitter for updates, and then sends “scrolling” data, one column at time, to the external LED display.
Continue reading Meggy Jr RGB Twitter Reader

Evil Mad Scientist Laboratories: Year 3

Evil Meggies

Happy birthday to us! Evil Mad Scientist Laboratories is now three years old.

To celebrate, we’re rounding up our most interesting projects from this past year.

Quick projects and observations:

Magnet tricks
17 cool magnet tricks

moneyDensity.kopi
The monetary density of things

Cheap calendar 2
Cheap Perpetual Calendar

Parts Tray-14
Contact Lens Case Small Parts Tray

Simple LED Projects:

lanterns - 11
Quick, easy, temporary, and beautiful LED garden lights

RoboGames Awards (on)
RoboGames Awards

LED Ghostie
LED Ghosties for Halloween

Food Hacking:

Dry Ice Martini
The Hungry Scientist Handbook

Decoder 2
South Indian Restaurant Menu Decoder

 

"That's no melon!"
“That’s no melon!”

Grillin 2
Hot Dog Bun Grilling Jig

LOLHearts - 34
Improved Custom Message Hearts

Apple Pie
Now that’s an Apple Pie!

Caprese - 16
Eyeball Caprese

Fractal Snowflake Cupcakes - 24
Fractal Snowflake Cupcakes

 

CandyFab

CF6k
The CandyFab 6000

Papercraft

Harley Sleeps
Cardboard Cat Chaise

EdgeLitCard - 49
Edge-Lit Holiday Cards

Hex Boxes5
Hexagonal Stacking Boxes

frabjous - 01
Making a Frabjous

Electronics Projects

Interactive LED Dining table
Interactive LED Dining Table Circuit

 

Color distortion
Giant seven segment displays

DarkPumpkin - 11
Dark detecting jack-o’-lantern

SolarCircuits - 06
Simple Solar Circuits

Soft Circuit Merit Badge14
Soft Circuit Merit Badge

Kit Projects

Meggy Rainbow
Meggy Jr RGB

VideoPeggy - 09
Video Peggy in action

Peggy 2 RGB
Peggy 2 RGB

2313Card - 1
ATtiny2313 breakout boards

Card1.1Top
Revised ATmegaXX8 boards

Crafty Projects

d12 Bag
DIY d12 Handbag (of Holding)

Meggy Jr RGB Cozy-21
Meggy Cozy

no-sew iPhone cozy14
No-sew iPhone Cozy

fabric klein bottle
Fabric Klein Bottle

Seat recovery
Reupholstery with Used Denim

Missile Command Skirt 24
Missile Command Circle Skirt

Fishbowl cat quilt29
Fishbowl Cat Quilt

Maulie-25
Turning Mollie into Maulie

Bicycle lunch bag
Bicycle Frame Lunch Bag

Acrylic Nesting Bracelets-1
Sinusoidal Bracelet Design

Microcontroller Projects

Time exposure
Tennis for Two, a video game from 1958

stockpumpkin - 11
Scariest Jack-o’-Lantern of 2008

mignonette - 09
70 bits of gaming goodness

Serial Port Added
AVR Serial Communication

lissajous-dark - 07
POV Lissajous figures

Mobius Circuit - 21
Single sided circuit board

bulbdial_1
A Bulbdial Clock

Geek Design

Snowflake generator
Vector Snowflake Application

Kindling
The Amazon Kindling

Pi (squared) trivet - 9
Pi Pie Trivet

lego - 2
Lego Kitchen Crafts

Binary Birthday
Binary Birthday

(Whew!)

Linkdump: June 2009