Module is available as a DIY project only.
This Module is currently available.
DIY friendly 4HP Simple VCO
The Simple VCO is a true 1V/Oct Saw Core Oscillator. With its single waveform output and the extreme low count of components, it is a perfect choice for a first DIY VCO.
http://www.davidhaillant.com/category/electronic-projects/simple/simple-vco/
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Blue Lantern Mr Blue Simple Saw Core VCO