April 5, 2010

in Projects

SkatePOV brings POV to your skate board. It is a minified version of MiniPOV2 attachable to your skateboard. Draw texts while skating!

The LEDs pulse to write the text. By moving the skateboard (aka skating) the blinking is converted into a matrix and the blinking becomes the text. This is the first project in a series to bring more effects to your skate board.


The schematics is drastically reduced to the original version, the LEDs have been reduced to white 0603 LEDs. and layd out in a very small PCB, small enough to not touch the ground or come anywhere where it is physically endangered (at least on my long-board). And yes, the silkscreen is one of my major fails. I do not know how often I checked the PCB but never spotted the real big mistake – no matter.
On the back there is a small NCP1402 step up converter to power it from two AAA batteries, with some too big capacitors. The ATTiny2313 is used in the very small and convenient MLF Package (a lot of pins on a very small space).

The PCB is mounted vertically on the battery holder. The whole device is attached with Velcro Tape to the skateboard to make it removable (a anti theft prevention?).

The Effect

In the end it gives a very nice (and in this version boring) text while skating around. You cannot see it good enough in the first picture, since it was a bit too dark while I made this photos, here is a better version:
But it was really worth doing it in SMT. What did we learn from this? Doing a daylight POV is much harder than I thought. It works after sunset and of course in the night, but there is much more power needed to be daylight compatible. More powerful LEDs, with a much smaller viewing angle is needed. But it was fun and pimping skateboards with light is a topic too long neglected. I think there is more to come. So stay tuned.