The core of the VCO is borrowed from famous Russian synth Polivoks VCO and in exponential converter we use the original matched transistor IC that was used in Polivoks.

 But we significantly updated schematics:

1) we introduced +-10V regulators for greater stability of operation,

2) we adjusted signal amplitudes to match requirements of contemporary modular synths and made all output signals available simultaneously,

3) we redesigned CV inputs to accept positive CV signals,

4) we introduced PWM circuit with manual and  voltage controlled pulse width,

5) we introduced synchronization input, so you can sync the VCO to other VCOs.

     Features:

  • Triangle, saw and pulse wave outputs
  • Manually adjustable and CV controlled pulse width
  • Great tracking across 8 octaves
  • Exponential FM input with attenuator
  • Synchronization input
  • Octave switch – 5 octaves
  • Skiff-friendly design

      Prices:

  • Set of 2 PCBs  + matched transistor IC + mechanical parts (PCB connectors and spacer) + 5 position rotary switch = 35EUR
  • Set of 2 PCBs  + matched transistor IC + mechanical parts (PCB connectors and spacer) + 5 position rotary switch + panel = 51EUR
  • Full kit= 125EUR

+ 21% VAT for individual customers in EU without EU VAT registration number + shipping

 

Erica Synths DIY Polivoks VCO on Modulargrid

 

Technical specifications:

Audio output amplitude

10Vptp

Octave range

C0 – C8

Panel width  

12HP

Module depth

35mm

Power consumption

34mA@+12V, 36mA@-12V

 

Disclaimer: please, if you have any questions on missing parts or similar issues, contact us within 1 months after receiving the kit!