Available as an assembled Module and as a DIY project.
This Module is currently available.
SPCTRL 5-step gate and cv sequenzer
RIPTIDE is a simple but effective sequential voltage source. Nothing to fancy. it can be triggered by an external clock or generate and output it's own clock. it can have between 4 and 5 stages but could also be reset via trigger for shorter sequences. Triggers could be deactivated per step.