open-source PCB: https://oshpark.com/shared_projects/b4LjJ3lk
p/n offworld-2 for $3/ea
powers two USB devices (ie, an arc and a grid) with data passthrough to computers/modules/etc. power provided by a mini-USB port, which can be connected to a common USB power source (two-prong apple thing, etc).
this version is different than the SWITCH module, which powered one device and toggled the data pins between two ports.
requires only two part numbers (with Digikey links):
also FYI, using this with arc + ansible and grid + ansible, the maximum current i measured pulling from the power source (using a USB power monitor) was maybe 250ma. so the issue is really not so much the amount of power but the fact that the draw might create noise. this is of course not true of all power supplies, as much depends on module combinations etc.
some ideas for community/open-source development:
- laser cut top/bottom covers
- version with single device port and a switch
- eurorack mountable version
- different port orientations