Eurorack-3330-Dual-Lin-Exp-VCA

Q: How many components are on the Eurorack-3330-Dual-Lin-Exp-VCA?

106 components, from 34 distinct parts. The full bill of materials is listed on this page.

Q: Where can I download the Eurorack-3330-Dual-Lin-Exp-VCA design files?

From the DIYSynthMNL/Eurorack-3330-Dual-Lin-Exp-VCA repository on GitHub, which has the schematic; the links under Design files point to each one.

Q: Can I use the Eurorack-3330-Dual-Lin-Exp-VCA design in my own project?

The repository has no license, so all rights stay with DIYSynthMNL. Use it as a reference, and ask the author before reusing the design.

DIYSynthMNL·Eurorack-3330-Dual-Lin-Exp-VCA·kicad/Eurorack-AS3330-Dual-Lin-Exp-VCA.kicad_sch

This repository ships a schematic but no board layout.

About the Eurorack-3330-Dual-Lin-Exp-VCA PCB

Eurorack-3330-Dual-Lin-Exp-VCA is an open source PCB design by DIYSynthMNL, published on GitHub. It is a board, with 106 components from 34 distinct parts.

Other key parts include the AS3330, TL072 and TL074. By type, the board carries 47 resistors, 23 capacitors, 12 diodes, 9 connectors, 6 ICs and 1 jumper.

It belongs with the audio designs in this gallery.

From the project

This is a dual linear or exponential VCA based on the AS3330 chip

A Eurorack dual VCA based on the AS3330 chip — two independent voltage-controlled amplifiers in one PDIP-18 package, each with simultaneous linear and exponential control inputs. Wide control range (120 dB), low distortion (<0.1%), low feedthrough (<−90 dB).

This design adds a Lin/Exp blend knob per channel (smooth pan between linear and exponential response), a CV attenuator + offset for shaping the control signal, an LED level indicator, and a mix output that sums both VCAs.

Main components on the Eurorack-3330-Dual-Lin-Exp-VCA

AS3330 TL072 TL074