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Braidboard

current version: 0119b

This began as a sort of hardware version of BriadLab but is becoming some kind of distributed-cellular-pattern-generator.

Activity

  • [02/06/19] Long break, but been thinking though making a simulator to get a better idea of how this all works. I need more memory in the boards, swapping between frame buffers doesnt allow enough room. I'm going to sketchout some plans as to what the simulator will look like, but i think i will call it:
   ______      ___           __   ____                    __
  / __(_)_ _  / _ )_______ _(_)__/ / /  ___  ___ ________/ /
 _\ \/ /  ' \/ _  / __/ _ `/ / _  / _ \/ _ \/ _ `/ __/ _  / 
/___/_/_/_/_/____/_/  \_,_/_/\_,_/_.__/\___/\_,_/_/  \_,_/

classes

  • [08/02/19] plan for the next week is to work on a font for drawing with. a set of tiles that can connect into different patterns.

  • [08/02/19] playing around with images, thinking of having little pattern swatches for the screens, will need to make some bitmaps/font. they can then infect each other flipping bits of the weaves in each other?

drawings

  • [01/02/19] simple version running, 4 possible states, inherit from parents and pass to child. Next try drawing the knot crossings instead of numbers.

first tests

  • [29/01/19] Aim to get some coding done this weekend 02/02/19.

assembled img

  • [29/01/19] PCB has arrived! assembled 18 tiles
  • [26/01/19] PCB arrives on 29/01/19

plan img

Requirements

  • using the convenience of arduino, as i can use the arduino as isp to program the attinys
  • for drawing to the screen i am using datacute's Tiny4kOLED Library but i might strip it down some more if i end up needing to

Hardware

  • pcb 0119bfront and back back
  • attiny84 (0119b using SOIC footprint) - datasheet
  • OLED 128x32 I2C - the four pin type you find on ebay
  • a bunch of breadboard spaced header pins & sockets
  • power from a socket, or can use coin cells, i'm gonna try get it hooked to a solar panel
  • i am avoiding making any enclosures at the moment

Specs

  • attiny84 has 8k of space which should be plently for the first braid animation tests
  • 3V-5V
  • 12mm x 40 mm tiles - not sure how deep they are yet till i assemble one, should sit pretty flush but we'll see how they go

Futures

  • bigger IC ?
  • smaller IC !
  • bigger/smaller screen ?
  • colour ?
  • add 20Mhz xtal ?

Pricing

Item ≈price link
attiny84 soic ≈£0.648 mouser
PCB: 12mm x 40mm 2 layer lead-free ≈£1.50 (@x10) pcbway
14 x male header 2.54 mm ≈£0.70 amazon
Board Total ≈£2.85 👍