The NOISE2 is a significant update to our original NOISE chip. Now it includes a pink noise source too, without the need for external pinking filters.Download the Electric Druid Noise2 Generator Datasheet
The datasheet includes the pinout diagram and application circuit.
There is further information about the algorithms used by the firmware and its development on the NOISE2 project page.
You can compare the features of various Electric Druid noise chips on the “Which noise chip do I need?” page.