STIFF – MP3 Controller
Stiff's requirements obliged programming that would provide adequate control of an mp3 player. Due to the interface of the mp3 player, the most prevalent issue in programming was finding the optimal delay times between switch actuating in order to start, play and maximize the volume of the mp3 player. To safely and reliably interface with the mp3 player an additional circuit board incorporating digital switches was integrated directly into the mp3 player with mosfets added to the cebb board to deliver sufficient power to the player.
The small PCB essentially houses 2 digital switches; 1 to control the 'on/off/play/pause' switch, and 1 to control the 'volume up' switch. Integrating these surface mount components onto a small PCB, allow for minimal wire connections, while maintaining a low profile to be able to fit the components safely into the mp3 player housing.
STIFF – Power Dynamo
The generator used for this dress comes from a push-motion dynamo flashlight. Due to the unusual ergonomic shape of the flashlights attempts were made to remove the dynamo mechanism from the body of the flashlight, but these attempts all yielded a substantial decrease in power-generating efficiency. Therefore the entire flashlight casing is integrated into the garment.
We formed a Sintra back-piece that followed the contours of the back that could be strapped on like a backpack. Because of the relatively high force of impact required to generate power, and the unusual shape of the flashlights, we used Dragon Skin Silicone as a buffer between the dynamos and the back-piece. These silicone-molded support bases minimize the possibility of damage to the dynamos, while not noticeably adversely affecting power generation.
Each dynamo’s push button has a 5” diameter Sintra disc attached via a plywood adaptor, giving a large surface to push on to generate power. In order to fill out the shape of the back, foam padding was placed between the dynamos, and a neoprene cover was made for the entire back-piece, in order to keep the parts safe, and aesthetically ‘smooth’.