Mehr Music Machines - Plexi 

Plexi [4HP] is a basic but super useful utility for Eurorack synthesizers. The signal path is 100% analog, this sequential switch is built to add diversity to your patching. Plexi is bi-directional: meaning the inputs can be used as outputs and the outputs used as inputs. WOW! Patch one source to four destinations, or four sources to a single destination. This tool is great for skipping between oscillators/waveforms or switching a single voice's effects paths.

You can use any gate/trigger/clock signal to advance the switch. A high gate at the reset input will hold the switch at the first in/out for the duration of the gate.

Plexi consumes very little current from your PSU