The Counter is a 4-Bit clock counter/divider. Each successive output from Q0 to Q3 is half the frequency of the previous. When used as a binary word it counts from 1 to 16. There is also an end of count output as RCO, when the counter reaches 16 it sends out a pulse on RCO. Used in conjunction with a Clock VCO and a DAC waveforms can be synthesized.

Bill of material and schematic on LZX product page​

Attention: Castle Series printed circuit boards and EuroRack frontpanels are offered as a resource for intermediate and advanced level Synth DIY enthusiasts who are experienced with assembling thru hole electronics assemblies and sourcing electronic components.

Building DIY kits happens on your own risk. We can't do support or give a guarantee for correct function, because that depends on your own skills. Be responsible and check the building instructions before you buy. Thank you!