Exercising To Space Invaders

April 26, 2009 by Caleb Kraft 16 Comments

game

[Matt] sent in this cool final project he did for his Computer Engineering course. They built a space invaders clone, where the player has to physically move back and forth to move the ship, and jump to fire. The game is projected on the wall, with a camera mounted below it, facing the player. The player, wearing an orange vest, is tracked for the movement and the firing. They also included a blue tooth heart rate sensor with the ultimate goal of using this data to vary the game difficult, but didn’t end up getting the code in. You can see a video of them testing it out at the end of his post.

Analog Audio Recorded On A Floppy

April 24, 2009 by Caleb Kraft 33 Comments

floppy_audio

[Jeri ellsworth] of fatmanandcircuitgirl.com has made an audio recorder out of a floppy disk and an old tape recorder. She’s able to record 15 seconds of audio directly to floppy disk. In the video after the break, she explains how it works, and why you hear the creepy reverb effect. The next step is to run this as a pedal effect for stage music, and she even mentions doing a larger hard drive version with the ability to seek tracks.

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Autonomous Tank Terrorizing Campus

April 23, 2009 by Caleb Kraft 18 Comments

tank

As a senior design project for ECE4007, [Nate], [An], [Chris], and [Wink] built an autonomous toy tank. It is using a Panasonic IR motion sensor to find targets, then once it’s facing the target it switches to visual motion tracking through it’s web cam. If it can get close enough, it will stop and begin rotating the turret for more accuracy. Finally it fires a pellet. It’s brains are an ICOP technology eBox-2300 running windows CE. All of the programming is available on the site, as well as a breakdown of the various sensors and hardware. As you can see in the video after the break, it does a decent job. Given some more time, we’re sure they could speed up the target acquisition process. Maybe we should add a category for Georgia Tech final projects.

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Condenser Microphone Building

April 22, 2009 by Caleb Kraft 28 Comments

mic

Browsing around today, this project caught our eye. Mainly due to the visual similarity to, well, personal massagers. As it turns out, it’s a home made studio condenser microphone. We would generally prefer to link directly to his personal page, that has a slightly more in dept write up, but it has popups and pop unders, so enter at your own risk. Generally condenser mics require phantom power to make the magic happen, but he has included a circuit to run them off of 9v batteries. We’ve done condenser mics before, but this seems a bit quicker and dirtier.

Making Cool Looking PCBs

April 21, 2009 by Caleb Kraft 25 Comments

pretty_pcb

[Mike] has posted an instructable on making cool looking PCBs. He does it a little differently than we do. He uses soda cans for the stencils and combines the solder mas and silk screen steps. Also, a bit of extra cooking gives him this cool gradient of color. He has managed to get some really fine etching. It isn’t as fine as a laser etching, but this should be able to handle the smallest stuff you can throw at it. We’re a bit curious what exactly he’s building. There’s a color picture after the break to show you what we mean.

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High Speed Book Scanner From Trash

April 20, 2009 by Caleb Kraft 28 Comments

book_scanner

[Daniel] sent us his entry to the Epilog laser cutter challenge on instructables. He made a book scanner, mainly out of found parts. The bulk of the project was salvaged from dumpsters, though if you’re not comfortable with that, the free section of craigslist might be able to do the job. The cameras are loaded with CHDK, using StereoData maker, and custom software to compile the images into PDFs. They did a fantastic job of documenting every step of the construction, including helpful tips for some of the more complicated parts. There are several videos in the instructable, so be sure to check them out. We’re particularly amused by the extra step of making the photo captions visually interesting. At 79 steps, it’s a long read, but well worth it.

3D Printing At Home

April 19, 2009 by Caleb Kraft 36 Comments

3dprint

We’ve seen a lot of 3d printing lately, with the RepRap and Cupcake, both the fused deposition modeling type. We don’t often see the Inkjet method. This is a great example of one, built in someones home. Instead of laying down layers of molten plastic, he uses the inkjet system to deposit glue like substances into layers of plaster. This project is much higher resolution than the other two, as you can see in the video of it making an RC engine case below. He is currently rebuilding it to be even better and larger.

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