The Blind Juggler

September 16, 2009 by Caleb Kraft 19 Comments

[vimeo = http://vimeo.com/1621390]

The Blind Juggler is a robot that juggles or bounces balls in a controlled manner without any sensory input. It is basically just a linear actuator with a paddle on the end to smack the ball back into the air as it returns to the ground. The crazy thing is, it is doing this based purely on pre programmed math. There are no sensors telling it to make any adjustments. While we could envision this functioning, we would never have expected it to be as stable as it is. You can see in the video above that they can actually move the entire robot around while maintaining the bounce. Also check out the pendulum version, instead of just actuating vertically, it is mounted as a pendulum allowing the ball to travel back and forth in an arc.

[via BotJunkie]

Using MatchBox Cars As A Switch

September 15, 2009 by Caleb Kraft 78 Comments

cars

[atduskgreg] posted this interesting setup to flickr. He’s using two toy cars as a switch. He has wired into their metal undercarriages so when they collide, the circuit closes. We’ve seen some pretty nifty home made interface items, but usually they are posted with a clear purpose or a project. This one is a little puzzling. Does he intend to keep using the cars or was he just fooling around? Is he working on a toy that does something when they crash? Was he merely bored and wanted to see what he could attach to his Arduino. We may never know.

Nixie Plasma Ball

September 15, 2009 by Caleb Kraft 15 Comments

plasma_ball_pic5

This one came out over a year ago and we missed it. [Daqq] has made a plasma ball out of a nixie tube. All that was required was the transformer from a cold cathode meant for computers and a nixie tube. He did have to do a tiny bit of modification to the power supply, which you can see on the project page. This isn’t the most useful project, since you can’t really see much of the plasma, but it is really cool nonetheless. We think this would make a really neat button. You can see a video of it in action after the break.

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Disabling Your Cell Phone’s Mic For Security

September 14, 2009 by Caleb Kraft 115 Comments

reedswitch

[Dan] set up this simple cell phone hack to disable his microphone when he’s not using his cell phone. He had read that the government can listen to you using your cell phone, even when it is off. This concerned him enough to hack into his phone. He removed the expansion port and wired the microphone to a magnetic reed switch. A strong magnet located in the screen side of his flip phone opens the circuit when he closes the phone. He notes that you could always just pop the battery out of your phone, but then you are left completely disconnected. This mod allows you to still receive phone calls.

Controlling An R/C Car With A Pic16F84

September 12, 2009 by Caleb Kraft 27 Comments

[youtube=http://www.youtube.com/watch?v=0hoFxx1EaN8]

[GuySoft] sent in this project. He doesn’t normally mess with electronics, but decided to give it a try. He chose a fairly complicated project to be his first, but seems extremely comfortable with it. This project was to control his R/C car with a pic16f84. That chip was chosen simply because it was the only one available at local stores. Though we’ve seen much more complicated projects in the past, he does a great job of showing exactly what has been done. He shares his thoughts and source code with us as well. He has express a little frustration about the closed source compiler he was using, so if anyone has any suggestions for him, he would probably appreciate it. The funny part is that he mentions that people would just tell him to “get an AVR”. We think the readers here will probably be happy with how he pulled it off.

The Old Robots Website

September 10, 2009 by Caleb Kraft 4 Comments

oldrob

We found The Old Robots Website this morning and ended up spending way too much time there. It’s a display of mainly consumer robots, though there are some custom jobs tossed in there too. Ranging from silly to awesome and everywhere in between, we found tons of great information. By strange coincidence, we saw Arok in a documentary about eclectic homes last night. Arok’s creator explained that not only is he an amazingly versatile robot, Arok is also going to be the medium for communication after his creators death. That makes him even creepier.

[via Robots Dreams]

S.P.A.R.K. Beginer Robotics Resources

September 10, 2009 by Caleb Kraft 2 Comments

spark

We love to see educational resources appear. iRobot has put together Starter Programs for Advancement of Robotics Knowledge or S.P.A.R.K to serve as not only education, but amusement with the purpose of getting people interested in robotics. With sections divided into different grade levels, it is obvious that this is mainly meant for school aged kids. There are some games as well to keep them amused when they need a break. We looked around a little bit and it seems that they are still fleshing it out. We hope to see some structured content specifically created for education of youngsters. Right now it is mainly links to other resources.

[via botjunkie]