The Clock Sync Expander from Flight of Harmony is a clock divider and stepped ramp generator acting as the clock synced link between your Facehugger and other Eurorack modules. Combining the two modules allows Facehugger to behave more like a traditional clocked sequencer. Or as traditional as any Flight of Harmony module gets. It accepts clock and reset gate signals and outputs both a clock signal and stepped ramp signal used to drive the external input on Facehugger. The ramp output is not a smooth waveform, but rather a stepped voltage that increases on every clock pulse. The length control sets the number of steps the ramp output takes before it resets, while the divide control determines the number of clock pulses it takes to advance to the next stepped level. The length control doesn't affect the voltage range of the output, only the number of steps. When used with audio rate signals, the Clock Sync Expander becomes a subharmonic generator. Divide sets the number of octaves below the signal driving it, while the length subdivides into smaller subsections, allowing for greater control than standard octave-based subharmonic generators. While the two modules don't connect directly, combining the Clock Sync Expander and Facehugger results in something more powerful than either on their own.

Facehugger Clock Sync Features

Clock synchronizer for Facehugger
Includes clock divider and stepped ramp waveform generator
Ramp outputs sends a stepped voltage based on incoming clocks and division settings
Adjustable ramp steps from 1-8
Reset input
Acts as a subharmonic generator with audio rate signals

https://www.perfectcircuit.com/flight-of-harmony-facehugger-clock-sync.html