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BackDT header 12 pin connector, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F215079%7FY1%7Fpdf%7FEnglish%7FENG_CD_215079_Y1.pdf%7F215079-4 connector TE-Connectivity Micro-MaTch Vertical 215079-8 7-215079-8 USB 3.0, type A, right angle 3mm lightpipe dual tower right angle DPDT push button https://www.e-switch.com/system/asset/product_line/data_sheet/210/800U.pdf CuK miniature slide switch, EG series, DPDT, right angle, http://spec_sheets.e-switch.com/specs/P040170.pdf Switch, single pole double throw, separate symbols K switch single-pole double-throw spdt ON-ON illuminated red green D Push button switch | | U3 | 1 | TL074 | Quad operational amplifier, DIP-14 | | | | | | Tayda | A-4349 | | C1 | 1 | 3_pin_Molex_connector | 3 | 4.7k | Resistor | | Tayda | A-804 | | | R14 | 1 | SW_SPDT | Switch, triple pole double throw, center OFF position K switch normally-open pushbutton push-button Side push button (https://www.alps.com/prod/info/E/PDF/Tact/SurfaceMount/SKRT/SKRT.pdf push horizontal SPST 1P1T CK components KMR2 tactile switch with signal lamp, generic K switch dp3t ON-ON-ON D Switch, dual pole double throw, separate symbols | | | | | | | | R109, R111, R113 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling)"/>