Let's Make Robots!

IR Homing Beacon?

I'm looking to build an Beacon, IR or otherwise, that a robot can see and simply drive to. Pretty much like a docking station for the robot to be recharged or a robot that follows you. (unless that's something different...)

I did a few searches, but I've only come up with robots that use a beacon and not how to build the circuit and write the code.

Any help? 


Edit: 8.31.09


I don't know if this helps, but I'm pretty much looking to build what CtC did here: http://letsmakerobots.com/node/6499

Sketch to CAD?

I have a paper & pencil sketch of my robotic design and I was wondering if there is anyway to easily create a CAD model by scanning my sketch into the computer. I user Google SketchUp and Alibre Xpress (yeah I'm cheap) and I can't afford anything "more advanced".  If there's anyway to do this, I would love to know, or if you could point me to a tutorial, that would be greatly appreciated.





All my projects, robotic or otherwise, have been created using the Arduino. I use it because it's simple, simple, easy and fast, and well simple. but I want to stop splashing around in prototype land and stop having to dissect all my projects to get the Arduino back just so I can start on my new projects. I want to use a microcontroller by itself!!!! 0.o


Hey guys, I have a question for you. I see many of you guys using the track and wheel set from Tamiya (http://www.sparkfun.com/commerce/product_info.php?products_id=321) that is special built to be compatible with their dual geared motors. For such a cheap price you get a very versatile tread kit that allows endless combinations of tread length and design, however, it seems what's gained in inexpense, is lost in quality.