ContentsContents4.1 Outline of Electrical Components ...................................................................................................................... 4-14.1.1 Sensors......................................................................................................................................................... 4-14.1.2 Microswitches ............................................................................................................................................. 4-24.1.3 Motors ......................................................................................................................................................... 4-34.1.4 PCBs ............................................................................................................................................................ 4-44.2 Variable Resistors (VR), Light-Emitting Diodes (LED), and ........................................................................... 4-64.2.1 Overview ..................................................................................................................................................... 4-64.2.2 Punch Controller PCB ................................................................................................................................. 4-6