Archive for the LED Category

Rainbow Wand Pictures

Posted in LED, video system on January 19, 2011 by raphaelabrams

I made a batch of about 20 very fancy persistence-of-vision LED display devices for Blue Man Group over the summer. They use a strip of 96 Cree RGB PLCC LEDs in one row. Every group of eight is driven by a tlc5947 chip, which is a 24 channel 12 bit pwm driver. There is a PIC microcontroller running at 40 mips doing IO and communications with a command board and a 4MB flash to store images on-wand.

These things have amazing color. It’s really hard to even come close to showing it in a photo, so I went for a somewhat abstract long exposure technique. They’re so bright I had to take pictures through a piece of tinfoil with a pinhole in it. Essentially I made sunglasses for my camera!

In the bottom left picture you can clearly see a pinup girl (the same one from the top image). That’s just from one swipe. The rest in that image are a close up of a lotus flower, a rainbow, and a picture of a lamp.

 

Shoes work again!

Posted in arduino, giant, Hot glue is the best thing in the universe. Deal with it., LED on May 27, 2010 by raphaelabrams

The giant baby shoes work again. They blink on each footstep.