This is four LFOs in one module to effeciently add more up and down to patches. Each LFO has a range of 0.04 to 55hz and triangle/square output waveforms.
This module is designed for 12V systems but can be used with 15V systems by adjusting 8 resistor values.
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 and panels are available now. Price for a PCB is $8.
Unfinished eurorack
panels are available for this project, they are 8HP 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.