The diagram above depicts the connections for the power, audio and gamepad. Use this as a reference for wiring the components. Note, the length of wires and position of components are not exactly how the circuit will be - it’s just a diagram to show connections.
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The 2.8" PiTFT connects to the Raspberry Pi's GPIO header. A GPIO ribbon cable plugs into the GPIO breakout of the PiTFT and connects to the PiGRRL gamepad PCB.