Tank Wars: A Video Game Controlling A Physical Bot

April 23, 2012 by Caleb Kraft 2 Comments

[Joe] sent us an email to show off his latest build. Tank Wars is the beginning of a video game/robot hybrid. You control the tank via an iPad, telling it where to go and how to fire. You have real life targets, in this case another robot. When you hit your target, the interface is updated with game stats. Currently, this is only a step past being a wifi controlled robot. [Joe] is working on making the game part of it a little more interactive.

The tank and the target are both run by Arduinos with RN-XV WiFly modules. The tank has obstacle avoidance both forward and backward, which, from the video, seems like it might make navigating a bit challenging at times. The iPad interface is just a web page, so it could really be used on any device. This is pretty cool, we can’t wait to see how he proceeds from here.

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Sassy Disco Bots Of The 80s

April 22, 2012 by Caleb Kraft 18 Comments

Surely, this is a glimpse into the future. No? Ok, its a glimpse into 1983. A small chinese fast-food restaurant in California put two 4.5 foot tall, 180 pound robots to work delivering food. Tanbo R-1 and Tanbo R-2 were their names and delivering food was their game. At least, when there wasn’t radio interference or their batteries were running low. They were built to deliver food to the tables and be polite to the customers. They also had some interesting quirky behavior, like responding “that’s not my problem” and dancing off to some disco music if they didn’t understand you. Do yourself a favor and go read some of the stories. We wish we could have seen them in action, they sound fantastically absurd.

Lego Mindstorms Used To Automate Tedious Laboratory Tasks

April 19, 2012 by Mike Nathan 15 Comments

lego-bone-machines

Modern society owes so much to medical research, though what happens behind the scenes in a laboratory is usually far less than glamorous. A group of scientists at the University of Cambridge are working to develop synthetic bone tissue, but the process to create the samples used in the study is incredibly tedious.

To make the bones, a substructure must be dipped in a mixture of calcium and protein, rinsed, then dipped in a mixture of phosphate and protein…hundreds and hundreds of times. Equipment that can automate the process is available but very cost prohibitive, so the scientists did what they do best and built a set of robots to do the work for them.

Their new bone manufacturing setup was constructed using Lego Mindstorm kits, which were a perfect solution to their problem in several ways. The kits are relatively cheap, easy to construct, easy to program, and able to perform the same function precisely for days on end.

Now instead of burning time manually creating synthetic bone samples, the group can focus on the more important facets of their research.

Continue reading to see a video presented at the 2012 Google Science Fair, showing how everything came together for the crew at Cambridge.

[via Make]

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2012 Robogames This Weekend In San Mateo California

April 18, 2012 by Caleb Kraft 2 Comments

As you may recall, many of us here at Hackaday are big fans of any activity involving robot competitions. One of the better known events that fits that description would be the Robogames, an international event where robots can compete in 50 different events. Granted, not all of them are as visually exciting as the ball of fire and twisted steel shown above, but they are interesting nonetheless. The event is happening this weekend, April 20th, in San Mateo California. Unfortunately, none of the Hackaday staff will be able to make it this year, but we’re really looking forward to seeing all the cool pictures that seem to flow out of the event.

If you happen to make it to the event, we’d love to see your pictures and videos.

Join us after the break for a short video that gives a taste of what the games are like.

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Robotic Whiteboard Writes Your Wall On The Wall

April 18, 2012 by Mike Szczys 6 Comments

[Dave’s] drawbot writes his Facebook wall messages on a whiteboard. The setup is pretty simple, depending on a pair of stepper motors and common household goods. As you can see in the image, the stylus is a plain old dry-erase marker held by a big spring clip (the kind that holds a stack of papers together). What you can’t see is that there’s a kick stand to hold the writing head away from the board when moving to the next plot point.

In this example a cursive font is being used, but [Dave] included two other fonts in the code. Those require the felt tip to be frequently lifted from the board, and a servo motor does this by pressing a cotton swab against the surface. This does erase any marker lines it slides past, but it’s a pretty small area that is lost. To control the motors [Dave] is using the EiBotBoard which was originally designed for the EggBot. It’s got a USB mini-b connector which lets a computer push messages scraped from the Internet. Don’t miss the video demonstration embedded after the break.

A small modification would make this into a pretty nifty light painting rig.

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Who Needs Mecanum Wheels?

April 3, 2012 by Mike Szczys 36 Comments

Skills are all that’s needed to solve a problem. Take this four-wheeled robot as an example. [Michal Zalewski] wanted it to be omnidirectional but wasn’t very satisfied with the concept of mecanum wheels and the like. So he designed a chassis with wheels at each corner that can pivot as one to change orientation. The image may look like a rendering at first glance, but this is actually the physical prototype. See what we mean about skills?

Okay, so the robot design is pretty cool. But we’re more excited about the build process. We’ve looked at [Michal’s] work before. He wrote a thorough guide about CNC mold making. These parts are all cast from epoxy. This starts with a rough milled mold, which is given a second pass for the fine details before being painted with a release agent and used to make a silicone mold. From this the parts are produced. Check out the Flickr set showing the casting process for the planetary gear box on each motor. If only these results were as easy to achieve as he makes it look.

[via Reddit]

Working Tachikoma Brings The Manga To Life

April 3, 2012 by Mike Szczys 19 Comments

This Lego Tachikoma drives and walks just like in the TV program. You simply must take a peek at the video after the break. We’ve watched it several times and don’t think there’s any editing magic going on. But the movements are so intriguing part of us thinks there’s something fishy about it.

Each leg has a wheel that is connected to a motor via chain drive. But the little guy isn’t constrained to smooth hard surfaces. When the going gets rough, he struts his stuff like an eight-year-old crossing the lawn in roller skates.

This is not just for show and you can build it yourself if you like. The link at the top has assembly instructions. You will need several specialized parts though, not the lest of which is the cement mixer drum halves that make up the rounded blue chassis pieces.

Not sure what the heck this thing is? Don’t feel bad, you’d need to be a fan of Ghost in the Shell to recognize it.

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