DIY Blinds (Black Magpie Panel)

Blinds is a powerful 4-channel VC signal polarizer. Every channel is comprised of a four-quadrant multiplier. The circuit acts like a VCA, but a negative control voltage results in the output being an inverted signal, instead of being silenced. The outputs are all daisy-chained, allowing adjacent channels to be mixed together. Blinds is great for using as a utility to control modulation CVs in a patch, although it can be used for much more!

PCBs are made by synthCube in blue material with immersion gold finish.

Blinds Features

• 4 Channel Polarizer / Bi-polar VCA
• Doubles as Quad Ring Modulator
• All inputs DC-coupled
• All inputs handle audio-rate signals
• Input impedance: 100k for all inputs
• CV offset range: +/- 5V
• Gain scale: linear, a +5V CV translates to a gain of 1
• Gain range: +/- 2

Blinds Specs

• Format: Eurorack
• Width: 12HP
• Depth: 10mm
• Current Draw: 90mA@+12V, 90mA@-12V
• Open Source Hardware