Your Source for DIY Pedal PCBs and NostalgiTone! › GuitarPCB Forum › GuitarPCB Build Support › 9V into Black Dog & CTO using 4PDT Wiring Diagram This topic has 1 reply, 2 voices, and was last updated 2 months, 1 week ago by Barry. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts August 13, 2025 at 1:01 pm #37015 CrumpredParticipant I thought I saw an example of this wiring set up, but had not luck finding it. How do I connect both boards to avoid a ground loop? August 13, 2025 at 1:17 pm #37016 BarryKeymaster https://guitarpcb.com/wp-content/uploads/2018/06/BD_Easy-Order-Switching-Board-4PDT-Footswitch.pdf Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In