This module is part of my Eurorack series. It is a simple utility module that inverts a given voltage in a range of -12V to +12V and is also capable to attenuate it and add an offset to it.

Key features

• dual inverter
• attenuator
• offset voltage (-12V to +12V)
• easy to build, all through hole components
• 6HP

How it works

The module is based on a simple inverting op-amp configuration. The input voltage is mirrored at 0V; voltage range is from -12V to +12V. In addition it is possible to attenuate the input voltage with a potentiometer which is acting as a variable voltage divider. An offset voltage ranging from -12V to +12V can be added to the input voltage. The output voltage is clipped when the operational voltage ranges of the op-amp are reached. Both inverters can be connected in series to have a copy of the input voltage plus offset.

This offering only includes the PCB without components!

See https://polykit.rocks/inverter for technical details and assembly.