Quad clock module
MASTER CLOCK module is a module for modular synthesizer for clocking actions by sending pulses at regular intervals. It acts as a metronome.
This module can be used independently and also can control or be controlled by any device / software using the MIDI standard.
http://www.ozoe.fr/articles.php?lng=fr&pg=308&tconfig=0
Module is available as a DIY project only.
This Module is currently available.