This is a slew (also known as glide or portamento) module that can be used as a sample and hold module. Pressing the button or inputting a gate switches between two different levels of slew, each with their own knob.
This is an analog project, compatable with 12v or 15v systems using PCB mounted potentiometers
For complete descriptions of the way the module is used, and how to build it, including schematics and parts list; download this PDF file.
Boards are available now. Price for 1 PCB is $8.
Unfinished eurorack
panels are available for this project, they are 6HP and cost $8 each.
There is
more information here about panels. If you're interested in drilling your own panel for
this project, feel free to use my
drill guide. That image should be printed at 300dpi for proper
scaling.