Braidboard

current version: 0119b

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

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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:

   ______      ___           __   ____                    __
  / __(_)_ _  / _ )_______ _(_)__/ / /  ___  ___ ________/ /
 _\ \/ /  ' \/ _  / __/ _ `/ / _  / _ \/ _ \/ _ `/ __/ _  / 
/___/_/_/_/_/____/_/  \_,_/_/\_,_/_.__/\___/\_,_/_/  \_,_/  

• [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?

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• [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.

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

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

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• [26/01/19] PCB arrives on 29/01/19

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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

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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

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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

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Futures

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

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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	👍

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