This module is a multiplexer designed to take up to eight input signals and select which is sent to the output. It has two modes of operation, direct and rotating.
In direct mode, the output is selected by the summed voltage between the Select knob and Select control voltage, with the clock input timing when the changes happen. In rotating mode, each tick of the clock input will cause the selected input to go up one step, the Select knob and CV control the highest numbered input it will rotate to before returning to the 1st input. The module can multiplex input voltages with a range of -5V to +5V. The module should work without error with input clocks up to 50khz.
This module uses an on-board voltage regulator and so it can be used with both +/-12V and +/-15V systems without any modification. It requires no callibration and uses a CMOS based switching chip that should be easy to source globally. Only the potentiometers are mounted to the PCB, so there is an above average amount of offboard wiring requried to build this module.
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/PIC set is $16.
Unfinished eurorack
panels are available for this project, they are 8HP and cost $8 each.
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.
