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a Studiolab production.
the wind I am enjoying
Posted in October 2010
Just a few pointers to useful posts and pages about Arduino activities that my students could find interesting:
- Arduino and the I2C bus, an easy tutorial from Littlebirdelectronics. Make your Arduino talk with other Arduinos and thousands of electronic parts over this simple two-wires bus. Slower than serial but much lighter.
- First steps into Arduino, from an experimenter called Will Eatherton
- Reading a gas meter with Arduino, interesting and adaptable to reading other types of meters (electricity, for example) or measuring the movement of moving parts in genera. Uses also the Ethernet shield.
- Building an Arduino based laser game, from the IBM developerWorks. Superbly detailed and clear, explains how to transmit small pieces of data over a laser beam (and it would also work with visible light).
- Using interrupts to measure time, to go beyond what pulseIn can do for you (this is an Arduino board discussion thread, read and use with caution)
In other news, we got a fine example of the Wizard of Oz technique at the Interactive Environments minor:
The MindHive team was busy controlling two interactive blocks with RGB leds. Two team members manipulate three sliders each, and another team mate does the talking and demoing. Click on the picture to get it in full resolution (3.5 Megs). Read all about it in their blog post.
Today I gave a little presentation inside the Computer Visualization class, run by Daniel Saakes. During the talk, I mentioned a few websites with very useful material. Here they are:
- photo.net is my standard pointer for introduction to photo technique. A very large site with a vibrant community and many useful tutorials
- Computational Camera and Photography MIT Opencourseware site centered on the near future of digital photography. Unusual techniques to make you rethink photography.
- Digital Photography from the School of Computer Science at Stanford. Includes applets to simulate photographic phenomena like depth of field. Very good in depth explanations of colorspaces and the gamma function.
- dpreview.com Technical reviews of photographic equipment. If you want to see diffraction demonstrated, take a look at any of their lens tests and watch what happens when you stop down the lens.
- Strobist will teach you how to use strobes and, more generally, how to think about light in photography. If you are thinking "I hate strobes", this is the site for you. If you love existing light photography, this is the site for you.
Why not include the two extreme examples I showed today? So, extreme depth of field and extremely shallow depth of field:
This was shot in Overschie this morning with a 10.5mm lens stopped down at f5.6, which guarantees that pretty much everything you see is in focus.
this, on the other hand, was shot with a 100mm lens at f2.8 from about one meter of distance. The Depth of Field applet you can find on the Stanford site lets you compute that the DOF was just a few centimeters. You can tell by the fact that the eyebrows are sharp but the eyeglasses frames are not, nor is the ear.
If you click on the photographs, you can download a higher-but-still-reasonable resolution version where the DOF difference will be even more apparent. Many thanks to super-photographer Bruko for reminding me of Strobist.