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George at nbitwonder caught this outside the Armstrong Hall of Engineering Purdue while walking to class.  The signs read:

I think work should be about making things work.  Better.  Faster.  Smaller.  Smarter.  So I build bridges between what’s known and what’s not.  I tinker.  I toil.  I write poetically in an abundance of languages (including code).  I hack.  I dissect.  I have an insatiable desire to un-complicate the complicated.  I am easily inspired.  I believe that just because it hasn’t been thought of doesn’t mean it won’t be.  Potential is my thrill ride.  Imagination is my most-used tool.  I am a maker, and I am what moves the world forward.

The QR code at the bottom right of the poster decodes to:  http://www.purdue.edu/makers

Always good to see I picked the right school for my EE degree!

Rob ‘linear’ Arnold has put together a fantastic LED Series/Parallel Wizard.  Not only will it calculate the current limiting resistor you need, it will draw a circuit diagram, and give you full statistics on power usage.  If you are just getting started with Electronics, this is a great resource for learning about LEDs.  Experienced users will enjoy a quick check of their math.

The array above is designed for some Blue LEDs I have laying around.  I wanted them to run with 15mA which is well below their max, but still very bright.  In this case 1/4W resistors should be fine and each should be 120 ohms.  I should be safe hooking this array up to an Arduino since each LED will draw less than each I/O pin can handle AND total current draw is only 60mA.

Very Cool Stuff!

http://led.linear1.org/led.wiz

westfw of the Arduino Forums has put together a nice Flickr Annotation of the New Arduino UNO. A couple of changes have been made from the previous Duemilanove. Interestingly they have left pads for either a crystal or resonator on the board. This may allow the end-user to use a crystal for more accuracy without adding additional cost for everyone else.