The ASM325 - VCO II is a condensed version of the ASM321 and was designed as a physical drop-in replacement for the EuroSerge ES20 1973 VCO.

All outputs are set to the EuroSynth Specification of 5VAC peak-peak.

The [SYNC] signal should be a pulse or square with a fast positive-edge and have an amplitude of at least 3VDC.

Build Guide