Log-in | Site Admin
Jpeg

25 different versions, Möbius bands, twisters, medals, stretchers, triangles, boxes, pipes, …

Jpeg

Jpeg

Jpeg

Title: Tiny knittings
Credits: Beam
Year of Invention: 2016
Description:
All versions are different knittings. The challenge was to create 3D or non rectangular knitted shapes, combined with a neopixel. A solo RGB neopixel and a SMD Attiny85 fit tightly together and become a very small but powerfull combination. An example of interactivity is with three triangular patches resulting in 3 analog resistance values which can be mapped to the RGB values of the neopixel, inside the circular knitted patch. Runs on a 3V coin battery.
Materials: Non conductive and sometimes conductive yarns
Techniques: Brother KH-940 machine knitting, using the N/H switch for making the non rectangular shapes and the white pocket for rgb pixel. Double Bed and garter bar techniques.
Dimensions (in cm): around 16 x 10 cm
Link(s):
Prep: http://kh-940.contrechoc.com/#post3
Neopixel library: https://learn.adafruit.com/adafruit-neopixel-uberguide/arduino-library
Scripts: https://github.com/contrechoc/swatch2016
STL file of the coin cell battery casing:http://www.thingiverse.com/thing:1627205
Circuit Diagram:
One pin for data-in to the neopixel, for the rest the usual ATtiny85 connections. If used, for resistive input then the usual connection for analog input.

Jpeg

Programming is done by pushing the SMD chip firmly on a small board having the right SMD imprint. Then put the small helper board on a big STK500:

smd_prog

Don’t forget to set the fuses:
avrdude -c stk500 -P /dev/tty.usbserial  -p t85  -U hfuse:w:0xdf:m -U lfuse:w:0xe2:m -v
(stk500 on /dev/tty.usbserial)

 


Leave a Reply