Arduino Hacks

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Thirty Year Old Pachinko Machine Meets An Arduino

June 14, 2011 by 8 Comments

When [Jim’s] thirty year old Pachinko machine started to freeze up and shorted out his computer’s graphics card he decided it was time to replace the old electronics with an Arduino. Originally the Pachinko machine ran off a 48 volt supply and control was achieved using about 20 relays, the random numbers were generated using some complex mechanical reels which we hope will find their way into a new project in the future.

All of this and the daunting amount of wire inside the machine have been replaced with an Arduino and an MP3 Shield for the sound effects, powered from a much safer 12 volts. The new machine runs just as you would expect a thirty year old machine to run, with all the grinding sounds and flickering lights. Check out the video after the break to see an overview of the project.

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Puppy POV: Four-legged Persistence Of Vision Display

June 14, 2011 by 7 Comments

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We see lots of persistence of vision projects around here, but we can’t recall any that involve a POV display facilitated by a living, breathing animal (humans aside, if you want to picky). [Michael] has a Miniature Pinscher that just loves to run and run…and run…in circles. Since she generally runs very fast and in large curves, he thought she would make a great POV device.

He has a small fleece “jacket” for his dog, and on it, he mounted a Lilypad Arduino, the associated power supply, and five bright white LEDs. Naturally, conductive thread was used to wire up the circuit, and after a bit of trial and error, things came together nicely.

With the vest complete, [Michael] unleashed his dog at the park, letting her run to her heart’s content. All the while, her vest was writing out [Cory Doctorow’s] “Makers” while he snapped some pictures.

We can’t think of a more appropriate text to write with LEDs in the night, but in the spirit of the book, we were hoping to see a circuit diagram or the project’s code posted. If he shares it, perhaps we could convince [Cory Doctorow] to run about the park in a vest, writing out [Michael’s] code in bright white LEDs!

Flashing Arduinos With A Zipit

June 13, 2011 by 17 Comments

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[Giacomo] finds that every once in awhile, he needs to flash a sketch to an Arduino while on the go. While he doesn’t always carry his laptop with him, he almost certainly has his Zipit Z2 on hand. He prefers to use the Zipit because it’s tiny, it uses Debian, has built-in WiFi, and can run for about 5 hours before requiring a recharge. The only shortcoming is that the device lacks a serial port.

Following instructions we featured last year he added a serial port to his device, then built a small converter cable that allows him to connect it to virtually any Arduino. He says it only takes a moment to get avrdude up and running on the Zipit via apt-get, and once that’s done, he is in business. He wrote a short script that saves him from entering the flash command over and over, so the process couldn’t be simpler.

He does mention that since the Zipit does not have a DTR line, Arduino resetting must be done manually. For the convenience of flashing sketches from the palm of our hand, we can deal with that.

Check out the video below for a quick demonstration of his setup.

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The WALL-E Robot

June 13, 2011 by 11 Comments

[Dino’s] latest Hack a Week project, the WALL-E Robot shows quite simply what you can create from a few dollars worth of toys from garage sales and cheap stores. When he found the WALL-E toy at a garage sale, Dino decided that he had to give it a brain. Using the geared motors from some Rumble Robots, the H-bridges from some $5 remote control cars (after his own H-bridges cooked themselves), an ultrasonic sensor and an Arduino, WALL-E was brought to life.

The WALL-E Robot might not be the brightest bot, or the most stable, but the project definitely demonstrates some effective scrounging for parts that would have done WALL-E proud. It also shows how even the most simple projects can cause the most headaches when they don’t go right. Check out the video after the break for the build details, a demonstration and to see a man talk to a toy robot.

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Hacking Cakes With LEDs, The Sequel!

June 12, 2011 by 27 Comments

A few weeks back we ran a piece about the convergence of making and baking in an attempt to create a cake festooned with working LEDs. The moral was that not every creative idea ends in victory, but we applauded the spirit it takes to post one’s goofs for the whole internet to see and to learn from.

[Craig]’s LED matrix proved unreliable…and the underlying cake didn’t fare much better, resembling that charred lump in the toaster oven in Time Bandits. The cakes-with-lights meme might have died right there if not for a fluke of association…

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Satellite Tracking By Shining A Laser Into Space

June 11, 2011 by 36 Comments

[Shingo Hisakawa] sent in a tip for a for a neat little box called the Levistone that tracks the Internation Space Station with a laser. His video log goes though all the steps for this great little project.

[Shingo] originally planned to pull orbital data down from NORAD and send that to an ArduinoBT board with ethernet, GPS and compass modules. In the original plan, the Arduino would do the orbit calculations and point the laser using a few servos. There wasn’t much success with making an Arduino do all the work, so the an Android phone stood in for the GPS, compass and connection to the web. The duty of calculating the location of the ISS using GPS and orbital elements was moved onto the Amazon EC2 cloud. The final product looks great, even if it’s impossible to record the beam for the video.

With the ability to calculate the azimuth and elevation of the ISS from any point in the world, [Shingo] came up with SightSpaceStation, a neat mashup of his data and Google Maps. There are also iOS and Android apps for a nice piece of work in augmented reality. It’s a great project that would really compliment the ISS desk lamp we covered a few days ago.

Forearm-mounted GPS Uses LEDs To Light The Way Home

June 10, 2011 by 17 Comments

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While some people can rely solely on memory and landmarks to find their way home, others need a bit more help. Consider Instructables user [_macke_] for instance.

Like other screenless GPS navigation devices we have seen, his “Find Home Detector” uses a GPS module to obtain his location, guiding the way home via a set of alternate indicators. In this case, he uses LEDs which are laid out like a compass rose. When [_macke_] is aimed toward his destination, the LED nearest to his fingertips lights up, letting him know he is on the right path. As he turns away from home, the other LEDs light, indicating the direction in which he should turn.

His forearm-mounted GPS navigator uses a LilyPad Arduino to control the system, much like others we have seen. It is connected to a GPS sensor and a compass module that work in concert to guide him home. The compass is responsible obtaining his heading information, and while it might look as if the LEDs that surround the module are pointing North, they are in fact indicating the heading of his destination instead.

It’s a cool little creation, and we can imagine it would be quite helpful if you happen to be walking home after a long night of drinking.

Be sure to check out the video below for a quick demonstration.

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