[Jeri] threw down the geeky fashion gauntlet by building this LED improved dress. She selected to assemble the job for her trip to BarBot 2011, as well as we can’t believe of a much more suitable setting for such a garment. It utilizes a movement sensor to set off a delayed pattern of blue lights hidden beneath the fabric.The finest part of the hack is the instamatic camera. It appears like a fashion accessory, however it’s truly hiding all of the circuitry for the lights.
Inside the video camera a PIR sensor waits up until it detects motion, sending a signal with an op-amp to the set off circuitry. A 74LS14 Schmitt set off chip teams up with some resistor-capacitor timer circuits to develop a delay chain for the LEDs. This way, after movement is detected the LEDs come on as well as off in a staggered pattern that doesn’t need a microcontroller as well as is extremely pleasing to the eye. See the Analog win for yourself after the break.