James NewtonJuergen Pintaske from Facebook also made and tested a version of this. (video is facebook only sadly) Here is the schematic he used:
he is very interested in a version with 3 channels for shift registers.
Another schematic
A project log for 2Wire (I2C) From Blocks of Light on an LCD Screen
2Wire (unidirectional I2C) coms from HTML5 to hardware via blocks of light on the screen.
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