Dimensions
8 HP
Current Draw
44 mA +12V
37 mA -12V
0 mA 5V
Price

Module is available as a DIY project only.

This Module is a prototype or in a concept phase.

Schräg (Schraeg)

Multimode filter with character switches, based on the Bastl Cinnamon

Schräg (also know as Schraeg, for the umlaut-deficient) is effectively a repackaged Bastl Cinnamon:

  • Multimode filter with independent outputs (2-pole LP, 2-pole HP, 1-pole BP)
  • V/oct input
  • Self-resonates for use as a sine oscillator
  • Input with an attenuator and 5x gain switch
  • Two character switches for altering the resonance tracking
  • All-SMD construction in a DIY-friendly format, with 0603 handsoldering footprints, all components on the back of the circuit board
  • Built mostly using standard and easily-available components

with a few modifications:

  • larger 8HP form factor, allowing for a big juicy cutoff knob
  • Voltage control over resonance, through an attenuverter
  • FM input through an attenuverter, which works as a pitch fine-tune control with nothing patched
  • Larger character and gain switches
  • A bi-directional power connector, with polyfuses
  • An Interactive BOM to aid in part placement

The additional functionality is achieved with a minimum of extra components, thanks to the two unused VCA cells in the original design.

The schematic, board layout and graphics are released under a cc-by-sa license. Bastl Instruments generously gave their permission for me to release my rework of their module. They’re a cool company. Go check out their work!

https://github.com/barnabywalters/Schraeg


submitted Jan 18th 2021, 13:39 by barnabywalters | last Change Aug 15th 2021, 22:35 by milkmilklemonade

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