Technology
ORB – Open random bit generator

Chip Pic
Here’s an open source random bit generator, source and schematic included… Link.

4 thoughts on “ORB – Open random bit generator

  1. A pity they use an old type of chip. The newer 12F675 could be used as well, and it’s easier to find.

    I think I will use this in my next project — I want to do stuff with randomness, and I found a schematic with a few transistors that has to run on 12V. This works on 5V (just like the rest of the schematic) and has a lower pincount (and thus a smaller footprint).

  2. Hey, that’s really similar to the technique I use on the Daisy kit. The ORB probably creates more crypto-friendly results, but the idea is the same. I use noise from the LSB of the AD converter and some “whitening” routines, but no external resistor. Interesting articles on wikipedia: http://en.wikipedia.org/wiki/Whitening

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