Q1,Q2 2N3904 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 U1 RC4558 Dual General Purpose, Operational Amplifier, DIP-8/SOIC-8/SSOP-8 D1 5V OK Light emitting diode D2 12V OK Light emitting diode D3 -12V OK Light emitting diode D4 PRSNT Light emitting diode D5,D6 1N4148WS 75V 0.15A Fast switching Diode, SOD-323 J1 DIN41612_02x32_AB DIN41612 connector, double row (AB), 02x32, script generated (kicad-library-utils/schlib/autogen/connector/) J2 OPT EURO Generic connector, double row, 02x08, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) J4 USB HEADER 1x4 MALE PINS 0.100” 180deg J5 Audio In Generic connector, single row, 01x08, script generated (kicad-library-utils/schlib/autogen/connector/) J6 Audio Out Generic connector, single row, 01x08, script generated (kicad-library-utils/schlib/autogen/connector/) J7 UART J8 I2C Generic connector, double row, 02x04, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) J11 EXT_INTERFACE_1 Generic connector, single row, 01x30, script generated (kicad-library-utils/schlib/autogen/connector/) J12 ONE V/O Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J13 FM^{x} Audio Jack, 3 Poles (Stereo / TRS), Switched T Pole (Normalling) J14 Daughter Generic connector, single row, 01x30, script generated (kicad-library-utils/schlib/autogen/connector/)