Make: Online: hacks Archives

hacks Archive: hacks

December 16, 2009

Wiimote as Scientific Sensor

Researchers from Delft University of Technology have assembled inexpensive alternatives to costly scientific sensors using the Nintendo Wiimote.

Luxemburg's team aimed the Wiimote at a problem that can be very tricky for hydrologists: measuring evaporation on a body of water. The easiest way to measure evaporation is to place pans of water near the lake, or whatever water is being studied, and put pressure sensors in them. The sensors record the drop in pressure as more and more water disappears. But this equipment can run $500 or more, and still the measurements aren't accurate because the water in the pan gets warmer on land than it would in the lake. Alternatively, measuring the level of water in a pan that is floating in a lake is also tricky because the pan will inevitably be moving.

Hacked Wiimote Makes Super Scientific Sensor [via Slashdot]

December 14, 2009

Holding round-head screws for trimming

Neil sent me this link to a cool trick for holding round-head screws while you cut the threads shorter. Cut a thin slit in a correspondingly-threaded nut, through one of the points. A rotary tool with an abrasive disk is probably a good tool for this. Then you can thread the screw in and grip the nut across the flats with pliers or a vise. Compression across the width of the slit will hold the screw firmly in place, and you can use the flat side of the nut to guide the saw.

December 12, 2009

Coins to Frequent Flier miles "hack"

2009-Native-American-Coin
Coins to Frequent Flier miles "hack" via DF.

Enthusiasts of frequent-flier mileage have all kinds of crazy strategies for racking up credits, but few have been as quick and easy as turning coins into miles.

At least several hundred mile-junkies discovered that a free shipping offer on presidential and Native American $1 coins, sold at face value by the U.S. Mint, amounted to printing free frequent-flier miles. Mileage lovers ordered more than $1 million in coins until the Mint started identifying them and cutting them off.

Coin buyers charged the purchases, sold in boxes of 250 coins, to a credit card that offers frequent-flier mile awards, then took the shipments straight to the bank. They then used the coins they deposited to pay their credit-card bills. Their only cost: the car trip to make the deposit.Richard Baum, a software-company consultant who lives in New Jersey, ordered 15,000 coins. "I never unrolled them," he says. "The UPS guy put them directly in my trunk." Patricia Hansen, a San Diego retiree who loves to travel, ordered $10,000 in coins from the Mint. "My husband took them to the bank," Ms. Hansen says, and she earned

December 3, 2009

Wii remote for MAME on iPhone

Mobile gaming mastermind ZodTTD has updated his mame4iPhone app to use BTStack, allowing the use of a Wii remote as a controller. I could see using this with the iPhone app video out hack as a low-cost casual gaming console. It would be pretty cool to go from playing a mobile game directly to playing the same game on a large screen with a controller. It's no Xbox, but give it a few years.

December 2, 2009

Attach an SLR lens to an iPhone with the Phone-O-Scope

Camera hacker Bhautik Joshi, who brought us the brilliant DIY tilt-shift lens hack, has produced another great optical device. Detailed instructions on his site walk you through the creation of the Phone-O-Scope, an optical coupler that allows an iPhone to accept a standard SLR lens.

Just to get the inevitable question of 'why' out of the way - well, why not? As far as I can tell, I think this is the first - I couldn't find any similar SLR lens to camera phone attaching attempts anywhere else online. The Phone-O-Scope doesn't take especially superb images, and it's a bit clumsy to handle. On the other hand, it's fun to shoot with and produces very analog (almost Holga-like) results. You also get the advantages of SLR lenses - that is, DOF effects, and the wide range of available focal lengths (i.e. macro to telephoto).

November 30, 2009

Android Market running on Archos 5 tablet

If you have an Archos 5 tablet and are interested in accessing all the wonderful apps available on the Android Market, jkkmobile has step-by-step instructions. [via jkkmobile]

November 16, 2009

Folding lightbox from IKEA changing table

Furniture hacker Boris converted an IKEA Sniglar baby changing table into a portable folding lightbox. [via IKEAHacker]

I first thought to keep the table structure as it, but finally, I preferred to use the two level of the table to make one foldable table. I first fixed together the two vat with a long piano hinge. Then I stuck aluminium foil into the vats to reflect the light and I fixed four neon tubes into it. A few meters of cable later, I then closed the vats with two white and opaque plexiglass panels and that's it.

November 13, 2009

Billy Bass brain upgrade

Here's a Design News Gadget Freak column on using an ARM-powered processor (the MBED ARM Cortex-M3 MCU Dev Board) to make a Billy Bass animatronic fish speak and move as you wish. [Caution: mild cursing in the video.]

Gadget Freak Case #150: Hotrod Your Billy Bass

November 12, 2009

VR bike ride through Google Street View

Maker Aki Mimoto wrote in to let us know about his exciting new Arduino/VR/Web app mashup. He's wired up his wife's bike on a stationary platform to an Arduino using a reed sensor. Using the sensor data from the bike, along with data from a head mounted display (HMD), Ari is able to accurately pinpoint his position within Google Street View. Additional data from the HMD allows Ari to look around at his surroundings for a true VR experience.

Pragmatically explained, it means that I don't have to sit in the darkness or stare at my garage door while I'm huffing away. Hopefully once this is done, I'll be able to spend a few nights a week pedalling away downstairs and work my way across the US or Australia over the course of the year.

In the Maker Shed:

Arduino Family

Make: Arduino

November 11, 2009

DIY Palm Touchstone car mount

This has to be the coolest car mount for any mobile device out there. Originally designed for home use, maker remington870_20ga from the everythingpre.com forums wired a stock Palm Touchstone Charging Dock to run directly off his car battery using off-the-shelf components. Not only do you get an unencumbered view of the screen, your mobile device gets a chance to charge itself without all the messy cables.

November 10, 2009

Synth sequencer from an LED kit

MirlitronOne explains how to turn a Velleman MK107 LED Running Light kit into a simple 8-step sequencer for use with analog synthesizers. A handy kit hack, but it's also not too much work to build one from scratch.

Related:

Sequence it!!

November 9, 2009

Driving a car with an iPhone. A freaking car. For reals.

John Boiles, who earlier this year showed us how to control an RC car using an iPod's internal accelerometer (and also how to control the lights on a dance floor in more or less the same way), is a member of Austin, TX, based engineering collective Waterloo Labs, who have up-gunned his iPod technology to control steering, brakes, and acceleration on a full-size automobile. Definitely not the safest hack I've ever blogged, but probably the most impressive. Great work, lady and gents. [Thanks, John!]

Voice Controlled LED sign

Humberto writes in to point us at this handy use of the Google Voice transcription feature. In his Voice2LED Project, Josh converted a simple LED sign into a voice-activated one by connecting it up to his phone number. It turns out that when you leave a message on a Google Voice voice-mail account, it is automatically transcribed into text and sent to your email. To take advantage of this, Josh built a program that looks for messages that start with a particular phrase, and then displays the rest of the text on the screen. He built the sign using instructions from nerdkits, and his source code is listed on his site.

This looks like a fun way to leave messages or notifications to the people that you live with.

In the Maker Shed:

Peggy 2 Kit

November 4, 2009

Ikea hack bookshelf bench

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.

Digital Mixtape plays mp3s old school style

MAKE subscriber Justin fused the convenience of digital music with the feel and playback functionality of a cassette -

It is a cassette tape adapter and a micro usb port hooked up to a tiny mp3 player that I picked up at target. Its a simple build and only took an evening. Its an on going project I started a while back.

Neat idea! More pics plus earlier versions of the project can be found on Justin's blog. Hmmm ... maybe the next incarnation could have FF/REW capabilities triggered by turning the spools?

November 3, 2009

Instrumentube: Play instruments on YouTube

Want to rock out, but forget to bring your instrument? Then you might want to check out Instrumentube, a collection of YouTube-based instruments that you play by dragging the video time slider to match up to the correct note. I can't imagine this being a very efficient way to play music, but it is a pretty funny hack.

[Thanks, Jacob!]

iPhone 3G and 3GS unlocked with blacksn0w

Master iPhone unlocker George Hotz aka GeoHot has done it again. Apparently the current iPhone 3G/3GS baseband has been successfully cracked and new unlock code titled blacksn0w will soon become available through the blackr1n jailbreak. [via iPhoneSchool]

November 2, 2009

Reanimating a robotic pet as a FrankenDog

Have a broken robotic toy that you want to bring back from the dead? Why not follow the lead of Morten Skogly, and re-animate it with a toy synthesizer? The FrankenDog looks like a good way to get some use out of an old toy, at least until you get around to pulling the motors out of it. I like the control 'switches' built by sticking conductive tape at the edge of the plastic piano keys.

Secret knock detector

RFID card readers becoming passé? Maybe what you need to guard the door to your high-tech lair is a secret knock detecting door lock. Using an Arduino and a bunch of parts found around the lab, Steve Hoefer built a device that unlocks your door when it receives a certain knock pattern. It works by counting the time between successive knocks, and can be re-programmed at the touch of a button.

Of course, this system is susceptible to a replay attack, because anyone can listen to the knock pattern and then know how to get in. If you are planning to use something like this, I would recommend either incorporating a timestamp into the message, or using a series of one time knocks, in order to make it harder to break into. Actually, that might make it more secure than a regular lock.

October 29, 2009

Silly-String-shooting Jack-'o-lantern

From Instructables user Eric Kingston comes this Arduino-controlled Silly String shooting pumpkin. It's motion-activated, makes a Goblin-esque cackling noise, and Tweets a report each time it squirts another victim. Eric also wins a thousand internet video style points for making his whole point in five seconds with no talking!

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.