A very cool little circuit for turning single notes into arpeggios in your modular synth. It features controls for range, note sets, and movement. It contains a built in clock with outputs for triggers and gates, and can also be controlled by external clocks.
There is an expander PCB that allows for external control voltage to be used on any of the stages and adds more control on the note set. It works on 15V and 12V supplies with no modifications, the PCBs have PC mounted pots for easy wiring and has footprints for Eurorack and MOTM power connecters.
Here's a short sound sample demonstrating some of the features of the arpeggiator.
In the sample you'll first hear some of the different note sets, then movement types, then the range, tempo and pwm controls are manipulated.
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, PICs and expander boards are available now. Price for the main PCB/PIC is $16. The expander PCB is $9.
Unfinished eurorack
panels are available for this project, they are 8HP and cost $7 each for both the main and expander PCBs.
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 for the main board or my my drill guide for the expander. That image should be printed at 300dpi for proper
scaling.
