Wiring scheme 1
If DC Jack is connected for powering the C4, the grounds between PSU and C4 need to be connected.
Wiring scheme 2
Each SPI Ground wire must be the same length as the Data wires per output, to prevent timing
issues. This automatically taken care of when these wires recombined in a single cable. Minor
differences in length due to uneven stripping of the wires, should not cause any problems.
C4 Manual
Version 2.1.5
24 74
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