Changes between Initial Version and Version 1 of GameOfLife


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Timestamp:
Nov 8, 2013, 10:17:53 AM (6 years ago)
Author:
hazen
Comment:

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  • GameOfLife

    v1 v1  
     1There are various hardware implementations of [https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life Conway''s Game of Life]
     2One of the most appealing is [https://www.adafruit.com/category/24 this one]
     3This has the cool feature that many can be connected together to make a larger "world"
     4The 4x4 size is too small to be very interesting by itself, and the starting pattern can''t be controlled.
     5
     6I propose a new implementation with the following features:
     7
     8* 8x8 multiplexed or "Charlieplexed" LED array
     9* Expansion capability like Dropout/Adafruit version
     10* On-line editing of starting pattern with optical download similar to the very clever
     11scheme described [http://www.wayneandlayne.com/projects/blinky/design/ here]
     12* Arduino-compatible boot loader if possible (or USBAspLoader)
     13* All through-hole construction
     14
     15Hopefully the cost can be kept low ($20 per board as a target).
     16
     17Tentative BOM is [https://docs.google.com/spreadsheet/ccc?key=0AlkcEtLoMLBZdE56bm04OENIa1N6alBMVGk4YWpnT0E here]
     18BOM cost @ 25 = $8.32.
     19
     20== PCB Layout ==
     21
     22Size options:
     23
     24* 4.8 in sq (0.6 LED pitch)
     25* 3.2 in sq (0.4 LED pitch)
     26* 2.4 in sq (0.3 LED pitch)
     27
     28If uC goes on same side as LEDs i.e. Dropout version, pitch is 0.7 inch.  Can maybe
     29do 0.6 inch pitch, thus 4.8 inch on side for square boards which can tile edge-edge.
     30A 3.2 inch square with LEDs on 0.4 inch pitch is also do-able with the uC on the back.
     31
     32=== Pricing for 15-20 pcs ===
     33
     34* [[oshpark.com_OSH_Park]]
     35at $10/board more or less.
     36* ExpressPCB, PCBExpress and Advanced are not in contention
     37
     38=== Pricing for 50-60 pcs ===
     39
     40''''PCBExpress pricing (E2 - 2L w/ SS+SM)'''
     41
     42* 14 in max, so 4x4 up is best. 
     43* For 65-168 in^2, 8 pcs are $669, 10 pcs are $715.
     44* This comes out to $21/boards @ 32 or $18/board @ 48.
     45
     46''''Advanced Circuits pricing'''
     47
     48* Seems that they can do 3*4.8 = 14.4 so price 3x2 up (14.4x9.6 in)
     49* 10 pcs is $61.22 or $10.20 per board @ 60. 
     50* 5 pcs is $110.59 or ''''$18.43 @ 30.'''
     51
     52* Also 19.2x14.4 or 4x3=12 up. 
     53* $25 @ 24, $18.25 @ 36, $14.20 @ 48
     54
     55