The OscDigiSeq is a 4+1 channel CV/Gate sequencer based on an Arduino.

In this movie it is controlling 4 analog synthesizers and an analog drum machine.

You can find instructions on how to build your own at http://www.oscillator.se/arduino. This is an open source project.

(Note: This video shows an earlier iteration where the note values were entered in hex. The current version uses decimal values.)