Instructables user peterdr has put together a really excellent tutorial on how to build his CT-1 open-source hardware intervalometer for Canon and Nikon digital cameras. There's more info about the project at his personal website, and a parts kit is for sale on Amazon.com.

It may look like some futuristic Christmas tree ornament, but the miniball is part of the BEAM robot family of "rollers." A miniball is a motorized hamster ball that, sadly, you don't see in the wild too often. Solarbotics used to sell a miniball kit. This Instructable, by MAKE contributor and Solarbotics intern, Jérôme Demers, shows you how to make your own.

Solar Powered Miniball Wannabe

More:
How-To Tuesday: Make a Beetlebot
BeetleBot Revisited
Mousey the BeetleBot?

Instructables user jvalal didn't like the look of his Powermat inductive device charging station, so he stripped out the guts and "re-skinned" it with a handmade wooden case.

I'm thrilled to share the EyeWriter with you all:

Behold the latest ocular assault weapon from the Graffiti Research Lab, openFrameworks, The Fat Lab and The Ebeling Group: The EyeWriter. It is a low-cost eye-tracking apparatus + custom software that allows graffiti writers and artists with paralysis resulting from Amyotrophic lateral sclerosis to draw using only their eyes.

The goal of the hardware component of the EyeWriter project is to make the most simple and inexpensive eye-tracking head-set possible to use with the "EyeWriter" software suite. Obviously, there are numerous ways to make eye-tracking hardware. Many of these designs, especially those produced for academic research projects (Open Eyes ), have already been published openly on the internet.

Our functional design specifications are as follows:

1. The EyeWriter should be as inexpensive as possible
2. The fabrication and assembly of the system should require only common hand tools
3. Whenever possible components and parts should be available for purchase locally versus online
4. The camera should produce 640 x 480 NTSC video
5. The camera should be sensitive to near-field IR light
6. The camera should not auto-iris (or auto-iris should be disabled in the camera's driver).
7. IR LEDs should be used to illuminate the pupil

Beyond that its up to you... this instruction set details a solderless variation of the EyeWriter that uses a hacked PS3 Eye and a pair of stunnas we bought on Venice Beach and suggests other possible EyeWriter configurations.

Yes, that's right, watch TemptOne tag buildings (with light) even though he can only move his eyes. We live in the future, and this project makes me feel so warm inside. The whole project is open source.

Here's one to bookmark, it's a very thorough tutorial for converting your EAGLE circuit schematic into PCB layout suitable for etching by Instructables user westfw.

Jon Cohrs writes:

Tired of the blocky, JPEG-like resolution of digital television? Do you long for the days of RF modulation and regulated-yet-unregulated content? Do you simply have the desire to toss your converter box out the window and make use of those rabbit ear antennae that are just lying around? If so, then you might be interested in becoming a savior of analog television! This Instructable will show you how to create your own fully-fledged low-power analog television channel, with any video source(including your computer) as a source of content.

We created one that went live the minute analog tv went dead. We're still the only analog station in NYC, but please join us in making more!!

From Instructables user ModMischief comes a great tutorial on building this impossibly clever one-person trompe l'oeil costume. As she says, "[w]hy choose between dressing as a sexy mermaid or a scary pirate when you could be both!"

Don't want to cut the cable on your Nunchuck or buy a teeny circuit board to do the trick when you have etching capability at home? Instructables user dany32412's Nunchuck Arduino adapter tutorial uses pretty much the same layout as Tod Kurt's, but you make it yourself!

I love this. Instructables user wholman has gathered together a bunch of scrap wood from "dumpsters, back alleys, vacant lots, abandoned buildings, recycling yards, and architectural salvage centers" and laminated it together using all-thread. Then he's very carefully smoothed and polished only one side of the finished block, leaving the underside rough to show off the process. Beautiful.

Ever wished that when you play air guitar, it would make real sounds instead of just the ones from your best death metal face? David Fournier, Jean-Louis Giordano, Monireh Sanaei, Maziar Shelbaf and Gustav Sohtell are here to help. They build the AIRduino guitar, a wearable virtual instrument. Open source with full documentation, naturally. [via Fashioning Technology]

Randy Sarafan writes:

The nice thing about IKEA furniture is that it is cheap and easy to hack. In other words, lets say that you were to buy two cheap $30 Gorm shelving units and assembled them to discover them that one was crooked. Well then, it would be really easy to spend an afternoon converting the crooked one into a solid, stylish and symmetric bookshelf bench. As you probably just guessed, this Instructable will show you how to convert a Gorm shelving unit into a bookshelf bench. With a few extra peices of hardware and a couple of basic power tools, you could be on your way to relaxation and organization all at the same time.

Pretty amazing costume build tutorial from Instructables user Incrxtc.

Instructables user msraynsford presents this detailed tutorial on how to build a prop replica of one of those District 9 guns that makes intelligent, loving, civilized creatures explode with a nauseating SPLAT. I want one!

This is the second revision of my PIC based LED binary clock. The original version was the first PIC project I attempted, it used a PIC16F84A to do both the timekeeping and control the display matrix, unfortunately it didn't keep good enough time and gained about a minute every week.

In the Maker Shed:


In the Maker Shed: DIY Design Electronics Kit

Bar End Brake Light: BEBL

Ian Lesnet submitted this cool hack-'o-lantern to our Make: Halloween Contest 2009. There's an Instructable here, a Flickr set here, and YouTube video here. It's a color-changing pumpkin full-court media press! The build uses a ShiftBrite RGB LED module, IR receiver, universal remote control, and a PIC18F2550 as the brains of it all.

Make: Halloween Contest 2009

Microchip Technology Inc. and MAKE have teamed up to present to you the Make: Halloween Contest 2009! Show us your embedded microcontroller Halloween projects and you could be chosen as a winner.

Samuel Seide brings us this animatronic talking skull Instructable. It's motion-activated and uses a Waveshield kit for sound. [Thanks, Sam!]

More from Sam Seide:

• Interactive Punch-Out arcade dummy
• Tiny arcade machine is tiny

In the Maker Shed:

Arduino WaveShield Kit

Make: Halloween Contest 2009

Microchip Technology Inc. and MAKE have teamed up to present to you the Make: Halloween Contest 2009! Show us your embedded microcontroller Halloween projects and you could be chosen as a winner.

This sturdy, portable DIY netbook stand is perfect for smaller models between 7-10 inches. [via liliputing]

In a nutshell, all you need are two IKEA shelf brackets, a drawer handle to hold them together, and some vinyl cabinet brackets to keep the laptop from sliding. You'll also need a drill, screwdriver, and hammer, but I'm going to go out on a limb and predict you've already got those lying around.

From instructables user depotdevoid comes this awesome Ghostbusters costume tutorial. Besides the proton pack, he made a trap, a pair of "ecto goggles," and the obligatory jumpsuit. "Aim for the flattop!"

Make: Halloween Contest 2009

Microchip Technology Inc. and MAKE have teamed up to present to you the Make: Halloween Contest 2009! Show us your embedded microcontroller Halloween projects and you could be chosen as a winner.

Instructables user deceiver lives in southern Maine and needed a big DTV antenna to pick up signals from up to 60 miles away, so he build Big Bertha, a giant dtv antenna, and shows your inquiring minds how to do the same.

More:

• Maker Workshop - DTV Antenna & Steadycam on Make: Television
• Maker Workshop PDF - DTV Antenna

Arduino is slow? What? This instructable will show just how slow a part of Arduino is, and how to fix it. It’s true – more specifically, Arduino’s digitalWrite command takes a considerable amount of time. If you are just switching on a LED once or something, you won’t be able to notice it. However, I realized how slow it was while I was trying to use a TLC5947 PWM driver. That requires the microcontroller to shift in 288 bytes each time! Each byte required about 12 digitalWrites, for a total of 3456 digitalWrites each time I wanted to shift in new data to the TLC5947. How long did that take? 30 seconds of just digitalWrite! But there is a solution – using “true c” style commands, or what the AVR GCC (GNU C Compiler) uses. The brains behind Arduinos are ATMega168s or ATMega328s. The AVR community typically uses “true c” commands to program these c

Instructables user neorazz has posted a tutorial on how to build a dust separator attachment for your shop vac. It is described as "cyclonic," which it may or may not actually be (see the comments), but it does, apparently, work quite well at separating out the heavier bits of flotsam (which end up in the bucket) from the actual dust (which goes on to the vacuum).

Instructables user pribich writes:

I have used a Kill A Watt electric meter for a while and I decided to build an analog one. This project went from being simple, with a single panel ammeter and an outlet, to full scale with three meters, a lamp socket, binding posts, and switches for all the outputs. Rather than simply mount the plastic meters I decided to remove the movements and reassemble them in a wooden case and make my own numbers for the meters with a piece of tea-stained paper and an old typewritter.

Check out more details about his analog electricity usage meter.

Instructables user jtigermask13 has posted a tutorial on making these working children's iPod costumes.

Make: Halloween Contest 2009

Microchip Technology Inc. and MAKE have teamed up to present to you the Make: Halloween Contest 2009! Show us your embedded microcontroller Halloween projects and you could be chosen as a winner.

Mike Galloway made this star field ceiling, rad!

Instructables user Light_Lab writes:

I collect lots of documents as part of my work; recently I decided I should let the sheets of ‘tree stuff’ return to the environment and clear up my living space and office by scanning everything I could. I had recently got rid of a flat bed scanner; it was far too slow and I hardly ever used it. I needed something that was convenient and fast; it didn't need to make ultra high fidelity scans, just readable would do.

Check out the tutorial for this easy and cheap copy stand.

With the days getting darker earlier, I've been on the search for collar visibility options for my canine companion. Instructables user sheepishlion posted a clever DIY for making an LED dog collar with the extra bling of old keyboard keys. They used the keys to spell out the dog's name, along with the "return" and "help" keys, and they also suggest using your phone number as an alternate safety feature. An Altoids tin and 9V battery were used for the power supply, which could be a bit big for a little dog, though my 65-pound Samoyed mix should be fine with it (and I'm certain she'll appreciate the geek cred as much as I do).

Check out this solar food deydrator made from reclaimed materials, and get started on your dried fruit recipes!

Here's yet another fun way to lace your shoes using the loop-back method, if you're tired of the way you've got 'em now!

More:

Shoe Lacing Methods

You know, you kind of have to see it blown up to life-size before you realize just how creepy the "Operation" game really is. Outstanding costume build by Instructables user NavySWO91. It works just like the game!

Make: Halloween Contest 2009

Microchip Technology Inc. and MAKE have teamed up to present to you the Make: Halloween Contest 2009! Show us your embedded microcontroller Halloween projects and you could be chosen as a winner.