(export (version "E")
  (design
    (source "C:\\Users\\gayli\\Documents\\Work\\SnorkelAI\\Ohm Bench\\2_7 MicrophoneAmp\\kicad_MicrophoneAmp_circuit_modified\\kicad_MicrophoneAmp_circuit_modified.kicad_sch")
    (date "2026-03-01T15:30:09-1000")
    (tool "Eeschema 9.0.7")
    (sheet (number "1") (name "/") (tstamps "/")
      (title_block
        (title)
        (company)
        (rev)
        (date)
        (source "kicad_MicrophoneAmp_circuit_modified.kicad_sch")
        (comment (number "1") (value ""))
        (comment (number "2") (value ""))
        (comment (number "3") (value ""))
        (comment (number "4") (value ""))
        (comment (number "5") (value ""))
        (comment (number "6") (value ""))
        (comment (number "7") (value ""))
        (comment (number "8") (value ""))
        (comment (number "9") (value "")))))
  (components
    (comp (ref "C1")
      (value "330n")
      (datasheet "~")
      (description "Unpolarized capacitor")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Unpolarized capacitor"))
      (libsource (lib "Device") (part "C") (description "Unpolarized capacitor"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "cap capacitor"))
      (property (name "ki_fp_filters") (value "C_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "8031b63b-00b5-4a8b-b63b-cf0d034d43e4"))
    (comp (ref "C2")
      (value "47u")
      (datasheet "~")
      (description "Unpolarized capacitor")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Unpolarized capacitor"))
      (libsource (lib "Device") (part "C") (description "Unpolarized capacitor"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "cap capacitor"))
      (property (name "ki_fp_filters") (value "C_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "1869bdd6-3599-441b-bc2b-2d55f4a67803"))
    (comp (ref "C3")
      (value "120p")
      (datasheet "~")
      (description "Unpolarized capacitor")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Unpolarized capacitor"))
      (libsource (lib "Device") (part "C") (description "Unpolarized capacitor"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "cap capacitor"))
      (property (name "ki_fp_filters") (value "C_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "2e40c2fd-011a-4daa-a127-7f5e0711f5c2"))
    (comp (ref "C4")
      (value "3.3u")
      (datasheet "~")
      (description "Unpolarized capacitor")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Unpolarized capacitor"))
      (libsource (lib "Device") (part "C") (description "Unpolarized capacitor"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "cap capacitor"))
      (property (name "ki_fp_filters") (value "C_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "04d8c7cf-66f2-48ba-b7a4-aee38b0d1bc6"))
    (comp (ref "MK1")
      (value "Microphone")
      (datasheet "~")
      (description "Microphone")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Microphone"))
      (libsource (lib "Device") (part "Microphone") (description "Microphone"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "microphone"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "7c3dc31d-56f0-401b-bfa0-d52617355ca4"))
    (comp (ref "R1")
      (value "5k")
      (datasheet "~")
      (description "Resistor, US symbol")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Resistor, US symbol"))
      (libsource (lib "Device") (part "R_US") (description "Resistor, US symbol"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "R res resistor"))
      (property (name "ki_fp_filters") (value "R_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "ca1e26b2-3be7-40fe-ae8f-1b4cde7955a4"))
    (comp (ref "R2")
      (value "200k")
      (datasheet "~")
      (description "Resistor, US symbol")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Resistor, US symbol"))
      (libsource (lib "Device") (part "R_US") (description "Resistor, US symbol"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "R res resistor"))
      (property (name "ki_fp_filters") (value "R_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "9729f409-e394-4840-8457-6e5fd755c7e7"))
    (comp (ref "R3")
      (value "200k")
      (datasheet "~")
      (description "Resistor, US symbol")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Resistor, US symbol"))
      (libsource (lib "Device") (part "R_US") (description "Resistor, US symbol"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "R res resistor"))
      (property (name "ki_fp_filters") (value "R_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "2f45bd7a-8caf-47ce-8a42-603d659dae35"))
    (comp (ref "R4")
      (value "787")
      (datasheet "~")
      (description "Resistor, US symbol")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Resistor, US symbol"))
      (libsource (lib "Device") (part "R_US") (description "Resistor, US symbol"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "R res resistor"))
      (property (name "ki_fp_filters") (value "R_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "c745d8f4-c4da-4790-b313-66a63e7767e1"))
    (comp (ref "R5")
      (value "10k")
      (datasheet "~")
      (description "Resistor, US symbol")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Resistor, US symbol"))
      (libsource (lib "Device") (part "R_US") (description "Resistor, US symbol"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "R res resistor"))
      (property (name "ki_fp_filters") (value "R_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "f3ea7c1d-b768-4110-b010-98a3e41452c3"))
    (comp (ref "R6")
      (value "10k")
      (datasheet "~")
      (description "Resistor, US symbol")
      (fields
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Resistor, US symbol"))
      (libsource (lib "Device") (part "R_US") (description "Resistor, US symbol"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "R res resistor"))
      (property (name "ki_fp_filters") (value "R_*"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "ce0cb861-cb6b-4d14-be8c-79ea818437bd"))
    (comp (ref "U1")
      (value "~")
      (datasheet "https://ngspice.sourceforge.io/docs/ngspice-html-manual/manual.xhtml#sec__SUBCKT_Subcircuits")
      (description "Operational amplifier, single")
      (fields
        (field (name "Sim.Pins") "1=in+ 2=in- 3=vcc 4=vee 5=out")
        (field (name "Sim.Device") "SUBCKT")
        (field (name "Sim.Library") "${KICAD9_SYMBOL_DIR}/Simulation_SPICE.sp")
        (field (name "Sim.Name") "kicad_builtin_opamp")
        (field (name "Footprint"))
        (field (name "Datasheet") "https://ngspice.sourceforge.io/docs/ngspice-html-manual/manual.xhtml#sec__SUBCKT_Subcircuits")
        (field (name "Description") "Operational amplifier, single"))
      (libsource (lib "Simulation_SPICE") (part "OPAMP") (description "Operational amplifier, single"))
      (property (name "Sim.Pins") (value "1=in+ 2=in- 3=vcc 4=vee 5=out"))
      (property (name "Sim.Device") (value "SUBCKT"))
      (property (name "Sim.Library") (value "${KICAD9_SYMBOL_DIR}/Simulation_SPICE.sp"))
      (property (name "Sim.Name") (value "kicad_builtin_opamp"))
      (property (name "Sheetname") (value "Root"))
      (property (name "Sheetfile") (value "kicad_MicrophoneAmp_circuit_modified.kicad_sch"))
      (property (name "ki_keywords") (value "simulation"))
      (sheetpath (names "/") (tstamps "/"))
      (tstamps "3a528c51-964b-46b9-b40f-9217fc5fbd2b")))
  (libparts
    (libpart (lib "Device") (part "C")
      (description "Unpolarized capacitor")
      (docs "~")
      (footprints
        (fp "C_*"))
      (fields
        (field (name "Reference") "C")
        (field (name "Value") "C")
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Unpolarized capacitor"))
      (pins
        (pin (num "1") (name "") (type "passive"))
        (pin (num "2") (name "") (type "passive"))))
    (libpart (lib "Device") (part "Microphone")
      (description "Microphone")
      (docs "~")
      (fields
        (field (name "Reference") "MK")
        (field (name "Value") "Microphone")
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Microphone"))
      (pins
        (pin (num "1") (name "-") (type "passive"))
        (pin (num "2") (name "+") (type "passive"))))
    (libpart (lib "Device") (part "R_US")
      (description "Resistor, US symbol")
      (docs "~")
      (footprints
        (fp "R_*"))
      (fields
        (field (name "Reference") "R")
        (field (name "Value") "R_US")
        (field (name "Footprint"))
        (field (name "Datasheet") "~")
        (field (name "Description") "Resistor, US symbol"))
      (pins
        (pin (num "1") (name "") (type "passive"))
        (pin (num "2") (name "") (type "passive"))))
    (libpart (lib "Simulation_SPICE") (part "OPAMP")
      (description "Operational amplifier, single")
      (docs "https://ngspice.sourceforge.io/docs/ngspice-html-manual/manual.xhtml#sec__SUBCKT_Subcircuits")
      (fields
        (field (name "Reference") "U")
        (field (name "Value") "${SIM.PARAMS}")
        (field (name "Footprint"))
        (field (name "Datasheet") "https://ngspice.sourceforge.io/docs/ngspice-html-manual/manual.xhtml#sec__SUBCKT_Subcircuits")
        (field (name "Description") "Operational amplifier, single")
        (field (name "Sim.Pins") "1=in+ 2=in- 3=vcc 4=vee 5=out")
        (field (name "Sim.Device") "SUBCKT")
        (field (name "Sim.Library") "${KICAD9_SYMBOL_DIR}/Simulation_SPICE.sp")
        (field (name "Sim.Name") "kicad_builtin_opamp"))
      (pins
        (pin (num "1") (name "+") (type "input"))
        (pin (num "2") (name "-") (type "input"))
        (pin (num "3") (name "V+") (type "power_in"))
        (pin (num "4") (name "V-") (type "power_in"))
        (pin (num "5") (name "") (type "output")))))
  (libraries
    (library (logical "Device")
      (uri "C:\\Program Files\\KiCad\\9.0\\share\\kicad\\symbols\\/Device.kicad_sym"))
    (library (logical "Simulation_SPICE")
      (uri "C:\\Program Files\\KiCad\\9.0\\share\\kicad\\symbols\\/Simulation_SPICE.kicad_sym")))
  (nets
    (net (code "1") (name "+5V") (class "Default")
      (node (ref "R1") (pin "1") (pintype "passive"))
      (node (ref "R2") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "3") (pinfunction "V+") (pintype "power_in")))
    (net (code "2") (name "GND") (class "Default")
      (node (ref "C2") (pin "1") (pintype "passive"))
      (node (ref "MK1") (pin "1") (pinfunction "-") (pintype "passive"))
      (node (ref "R3") (pin "2") (pintype "passive"))
      (node (ref "R6") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "4") (pinfunction "V-") (pintype "power_in")))
    (net (code "3") (name "Net-(C2-Pad2)") (class "Default")
      (node (ref "C2") (pin "2") (pintype "passive"))
      (node (ref "R4") (pin "1") (pintype "passive")))
    (net (code "4") (name "Net-(C3-Pad2)") (class "Default")
      (node (ref "C3") (pin "2") (pintype "passive"))
      (node (ref "C4") (pin "1") (pintype "passive"))
      (node (ref "R5") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "5") (pintype "output")))
    (net (code "5") (name "Net-(MK1-+)") (class "Default")
      (node (ref "C1") (pin "1") (pintype "passive"))
      (node (ref "MK1") (pin "2") (pinfunction "+") (pintype "passive"))
      (node (ref "R1") (pin "2") (pintype "passive")))
    (net (code "6") (name "Net-(U1-+)") (class "Default")
      (node (ref "C1") (pin "2") (pintype "passive"))
      (node (ref "R2") (pin "2") (pintype "passive"))
      (node (ref "R3") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "1") (pinfunction "+") (pintype "input")))
    (net (code "7") (name "Net-(U1--)") (class "Default")
      (node (ref "C3") (pin "1") (pintype "passive"))
      (node (ref "R4") (pin "2") (pintype "passive"))
      (node (ref "R5") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "2") (pinfunction "-") (pintype "input")))
    (net (code "8") (name "VOut") (class "Default")
      (node (ref "C4") (pin "2") (pintype "passive"))
      (node (ref "R6") (pin "1") (pintype "passive")))))