Feb 292012

Autodesk 123D Catch

Turn ordinary photos into extraordinary 3D models with Autodesk® 123D™ Catch. Take photos of your favorite people, places and things and let the power of the cloud magically transform them into detailed 3D models.

123D Catch is free beta software. Try it out and share your projects with us in our gallery.


  • Snap

    Take multiple digital photos of stationary people, places or things with any standard digital point-and-shoot camera.

  • Submit

    Powerful photo stitching technology operates in the cloud, generating high-quality 3D models. Add or remove photos to adjust the results.

  • Share

    Save your project as a movie and share it via email or post it to YouTube. Export the model to .obj or .dwg to use it in other 3D tools.

123D blog

  • Sharing is Caring

    As part of our effort to help you make really cool stuff, we created the 123D Gallery. If you are an avid 123D user you are likely already familiar with the Gallery. If you aren’t f…

 Posted by at 7:41 am
Feb 272012


Flash Animations for Physics

We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window.

The animations are sorted by category, and the file size of each animation is included in the listing. Also included is the minimum version of the Flash player that is required; the player is available free from http://get.adobe.com/flashplayer/. The categories are:

In addition, I have prepared a small tutorial in using Flash to do Physics animations. It contains screen shots and embedded Flash animations, so the file size is a 173k. You may view it in a separate window at http://faraday.physics.utoronto.ca/PVB/Harrison/Flash/Tutorial/FlashPhysics.html.

 Posted by at 7:42 am
Feb 222012

BREAKING NEWS: Error Undoes Faster-Than-Light Neutrino Results

by Edwin Cartlidge on 22 February 2012, 1:45 PM | 0 Comments

It appears that the faster-than-light neutrino results, announced last September by the OPERA collaboration in Italy, was due to a mistake after all. A bad connection between a GPS unit and a computer may be to blame.

Physicists had detected neutrinos travelling from the CERN laboratory in Geneva to the Gran Sasso laboratory near L’Aquila that appeared to make the trip in about 60 nanoseconds less than light speed. Many other physicists suspected that the result was due to some kind of error, given that it seems at odds with Einstein’s special theory of relativity, which says nothing can travel faster than the speed of light. That theory has been vindicated by many experiments over the decades.

According to sources familiar with the experiment, the 60 nanoseconds discrepancy appears to come from a bad connection between a fiber optic cable that connects to the GPS receiver used to correct the timing of the neutrinos’ flight and an electronic card in a computer. After tightening the connection and then measuring the time it takes data to travel the length of the fiber, researchers found that the data arrive 60 nanoseconds earlier than assumed. Since this time is subtracted from the overall time of flight, it appears to explain the early arrival of the neutrinos. New data, however, will be needed to confirm this hypothesis.

 Posted by at 10:21 pm
Feb 032012

10 Beginner MSP430 Tutorials and Counting.

Posted in Tutorials | 3 comments

[B]eretta, the blogger from mspsci.blogspot.com has an amazing series for getting started on the MSP430. He starts right from the basics of his hardware setup to software, your first program, timers and then moves to other modules of the MSP. Each blog post comes bundled with source code and the occasional schematic.

To make things easier for 43oh readers, below is a list of his tutorial series. Thanks [B]eretta, keep them coming!

Writing your direst program – Blink an LED
Configuring Inputs and Outputs


 Posted by at 6:10 pm