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Bliplace 2





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Published on Sep 30, 2012

First Bliplace2 boards in action. Bliplace2 is the second version of my wearable, hackable, sound-responsive LED pendants. These ones have 8 full-color LEDs and are easily programmable using the standard Arduino toolkit + a USB-to-serial cable (in the same fashion as the Lilypad boards).

Boards are 1 inch by 1.3 inches (I should've put a quarter in the shot for scale). The left one has a pin header soldered on for easier reprogramming, the right one has a small wiring change to reduce power in sleep mode by turning the mic off. I'll make a few changes in the next board revision to add that modification and to make soldering easier (pads on 0805 parts don't stick out enough to touch an iron to easily), but overall things are nice and stable.

Power consumption averages around 4.5 milliamps in active mode (using the pattern in the video) and around 35 microamps in sleep mode (with the mod mentioned above). Battery life should be around 40 hours active with a CR2032, 6 months asleep. I might add an auto-sleep mode to save battery power if the user forgets to turn it off.

Device thickness is 7.5 mm - wearable, but still a little thick. I could get that down to 5.0 if I switched to a CR2016 battery, though that would reduce battery life to 15 hours.

Music is "Paradise Circus" by Massive Attack.

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