Shared Projects by morc

A pcb for a 6hp passive eurorack attenuator in 1U (IJ format). The pcb is designed for a 9mm alpha pot (100kB) and two jacks (e.g. thonkiconn).

It is recommended to use pots with a knurled or round shaft. Note that the pot is oriented at a 90 degree angle, the marks on a D-style knob will be oriented incorrectly.

There are additional solder pads to connect to the normalization inputs of the jacks (input and output).

The pcb works with the shared project “Passive Attenuator for Eurorack (6hp, 1U, IJ format) - PANEL VERSION B”

A panel for a 6hp passive eurorack attenuator in 1U (IJ format).

The panel can be used without a component pcb (just add the pot and jacks and solder on the back using wires), but it works best with the corresponding component PCB: “passive Attenuator for Eurorack (6hp, 1U, IJ format) - PCB VERSION B”

Note that the markings are not 300 degrees. If your pot uses a 300 degree rotation, the markings are slightly off (some pots also use 270 degrees, it really depends on the pot).

A panel for a 6hp passive eurorack attenuator in 1U (IJ format).

The panel can be used without a component pcb (just add the pot and jacks and solder on the back using wires), but it works best with the corresponding component PCB: “Passive Attenuator for Eurorack (6hp, 1U, IJ format) - PCB VERSION A”

Note that the markings do not cover 300 degrees but slightly less. See an updated panel here: https://oshpark.com/shared_projects/p0Sa2p0l

A pcb for a 6hp passive eurorack attenuator in 1U (IJ format). The pcb is designed for a 9mm alpha pot (100kB) and two jacks (e.g. thonkiconn).

There are additional solder pads to connect to the normalization inputs of the jacks (input and output).

The pcb works with the shared project “Passive Attenuator for Eurorack (6hp, 1U, IJ format) - PANEL VERSION A”

A 4hp blank panel for Eurorack 1U rows (IJ format). In order to use the panel, you have to sand down the little nubs that OSHpark leaves after production.