lx-sw-btn

The lx-sw-btn is a 2HP eurorack module with 4 customizable switches/buttons enabled CV outputs!

With two buttons and two switches, the lx-sw-btn enables four CV "on-off" outputs. By default, the output is set to 0-5V, but each output can be fine-tuned through front-panel adjustment holes ranging from -10V to +10V. This will allow you to use the switches not only as triggers but also for precise CV control.

I made the lx-sw-btn to replace a prototype made without PCB, used mostly to generate trigger during module development.

The final module is extremely compact (2HP). This small form factor has been possible thanks to a single double-sided PCB.

This PCB contains on top:

• invert polarity protection and input filtering

• buttons switch and output jack

• tuning potentiometers

And on the bottom:

• the main logic with op-amp

• output 10k impedance and RC debounce filter

The front panel is also made from a PCB. Both main board and front panel were made using PCBWay services.

The lx-sw-btn can being fine-tuned through the front panel via the 4 potentiometers. The output can be set to a precise CV voltage from -10V to 10V.

This functionality makes it a useful tool to generate trigger or more complex CV source, while its compact 2HP design ensures it doesn’t take up unnecessary space.

This project is open source under MIT licence. The sources are available on Github.