L1: using buttons Button circuit buttons arduino microcontroller work switch floating input using problem hooked similarly sort above non version figure but will Jack wiring inspiron input connect barrel wires simpler
Arduino uno board pin details How to wire and program a button Arduino schematic
Arduino androiderode pinout pinouts .
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L1: Using buttons | Physical Computing
Arduino Uno Board Pin Details
Inspiron 15-3531 Power Input Wiring Diagram