Any chance you finished that schematic? Or can just explain your wiring? I can see the battery is connected to the battery in on the charge board and the output to the synth board is coming out of the output on the boost board, but why did you tie the grounds together, and what is the switch wired to?
@SoLongSidekick_40366 Hey, did you figure it out by any chance? I'm not sure how to connect the two boards exactly. Does the ground connect to every "-" pin of each board?
From the pictures in this mod, he bridges the - of the battery board in and out and the n to the NTS. But what about the "-" in and out of the step up?
Hey, can you please share a photo of how the connection between the boards is handled? I can't quite figure it out from the one photo you provided. Thanks!