(kicad_sch (version 20211123) (generator eeschema)
  (paper "A4")
  (lib_symbols
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      (property "Value" "LF356" (id 1) (at 0 3.81 0))
      (property "Footprint" "" (id 2) (at 1.27 1.27 0))
      (property "Datasheet" "http://www.ti.com/lit/ds/symlink/lf357.pdf" (id 3) (at 3.81 3.81 0))
      (property "ki_keywords" "single jfet opamp" (id 4) (at 0 0 0))
      (property "ki_description" "Single JFET Input Operational Amplifiers, DIP-8/SOIC-8" (id 5) (at 0 0 0))
      (property "ki_fp_filters" "SOIC*3.9x4.9mm*P1.27mm* DIP*W7.62mm* TSSOP*3x3mm*P0.65mm*" (id 6) (at 0 0 0))
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            (xy 5.08 0)
            (xy -5.08 -5.08)
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        )
      )
      (symbol "LF356_1_1"
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          (name "NULL")
          (number "1")
        )
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          (name "-")
          (number "2")
        )
        (pin input line (at -7.62 2.54 0) (length 2.54)
          (name "+")
          (number "3")
        )
        (pin power_in line (at -2.54 -7.62 90) (length 3.81)
          (name "V-")
          (number "4")
        )
        (pin input line (at 2.54 -7.62 90) (length 6.35)
          (name "NULL")
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        (pin output line (at 7.62 0 180) (length 2.54)
          (name "~")
          (number "6")
        )
        (pin power_in line (at -2.54 7.62 270) (length 3.81)
          (name "V+")
          (number "7")
        )
        (pin no_connect line (at 0 2.54 270) (length 2.54) hide
          (name "NC")
          (number "8")
        )
      )
    )
    (symbol "Analog_DAC:DAC0808_DIP" (in_bom yes) (on_board yes)
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      (property "Value" "DAC0808_DIP" (id 1) (at 2.54 13.97 0))
      (property "Footprint" "Package_DIP:DIP-16_W7.62mm" (id 2) (at 0 0 0))
      (property "Datasheet" "http://www.ti.com/lit/ds/symlink/dac0808.pdf" (id 3) (at 0 0 0))
      (property "ki_keywords" "8 bit multiplying DAC" (id 4) (at 0 0 0))
      (property "ki_description" "8-bit multiplying DAC" (id 5) (at 0 0 0))
      (property "ki_fp_filters" "DIP*W7.62mm*" (id 6) (at 0 0 0))
      (symbol "DAC0808_DIP_0_0"
        (rectangle (start -7.62 -10.16) (end 7.62 12.7)
          (fill (type background))
        )
      )
      (symbol "DAC0808_DIP_1_1"
        (pin no_connect line (at 10.16 -5.08 180) (length 2.54) hide
          (name "NC")
          (number "1")
        )
        (pin input line (at -10.16 -2.54 0) (length 2.54)
          (name "A3")
          (number "10")
        )
        (pin input line (at -10.16 -5.08 0) (length 2.54)
          (name "A2")
          (number "11")
        )
        (pin input line (at -10.16 -7.62 0) (length 2.54)
          (name "A1")
          (number "12")
        )
        (pin power_in line (at 0 15.24 270) (length 2.54)
          (name "VCC")
          (number "13")
        )
        (pin output line (at 10.16 10.16 180) (length 2.54)
          (name "VREF+")
          (number "14")
        )
        (pin output line (at 10.16 7.62 180) (length 2.54)
          (name "VREF-")
          (number "15")
        )
        (pin passive line (at 10.16 -2.54 180) (length 2.54)
          (name "COMPEN")
          (number "16")
        )
        (pin power_in line (at 0 -12.7 90) (length 2.54)
          (name "GND")
          (number "2")
        )
        (pin power_in line (at 2.54 -12.7 90) (length 2.54)
          (name "VEE")
          (number "3")
        )
        (pin input line (at 10.16 2.54 180) (length 2.54)
          (name "I0")
          (number "4")
        )
        (pin input line (at -10.16 10.16 0) (length 2.54)
          (name "A8")
          (number "5")
        )
        (pin input line (at -10.16 7.62 0) (length 2.54)
          (name "A7")
          (number "6")
        )
        (pin input line (at -10.16 5.08 0) (length 2.54)
          (name "A6")
          (number "7")
        )
        (pin input line (at -10.16 2.54 0) (length 2.54)
          (name "A5")
          (number "8")
        )
        (pin input line (at -10.16 0 0) (length 2.54)
          (name "A4")
          (number "9")
        )
      )
    )
    (symbol "Connector:Conn_01x01_Male" (pin_names (offset 1.016) hide) (in_bom yes) (on_board yes)
      (property "Reference" "J" (id 0) (at 0 2.54 0))
      (property "Value" "Conn_01x01_Male" (id 1) (at 0 -2.54 0))
      (property "Footprint" "" (id 2) (at 0 0 0))
      (property "Datasheet" "~" (id 3) (at 0 0 0))
      (property "ki_keywords" "connector" (id 4) (at 0 0 0))
      (property "ki_description" "Generic connector, single row, 01x01, script generated (kicad-library-utils/schlib/autogen/connector/)" (id 5) (at 0 0 0))
      (property "ki_fp_filters" "Connector*:*" (id 6) (at 0 0 0))
      (symbol "Conn_01x01_Male_1_1"
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          (pts
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            (xy 0.8636 0)
          )
          (fill (type none))
        )
        (rectangle (start 0.8636 0.127) (end 0 -0.127)
          (fill (type outline))
        )
        (pin passive line (at 5.08 0 180) (length 3.81)
          (name "Pin_1")
          (number "1")
        )
      )
    )
    (symbol "Connector:Conn_01x08_Female" (pin_names (offset 1.016) hide) (in_bom yes) (on_board yes)
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      (property "Value" "Conn_01x08_Female" (id 1) (at 0 -12.7 0))
      (property "Footprint" "" (id 2) (at 0 0 0))
      (property "Datasheet" "~" (id 3) (at 0 0 0))
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      (property "ki_description" "Generic connector, single row, 01x08, script generated (kicad-library-utils/schlib/autogen/connector/)" (id 5) (at 0 0 0))
      (property "ki_fp_filters" "Connector*:*_1x??_*" (id 6) (at 0 0 0))
      (symbol "Conn_01x08_Female_1_1"
        (arc (start 0 -9.652) (mid -0.508 -10.16) (end 0 -10.668)
          (fill (type none))
        )
        (arc (start 0 -7.112) (mid -0.508 -7.62) (end 0 -8.128)
          (fill (type none))
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        (arc (start 0 -4.572) (mid -0.508 -5.08) (end 0 -5.588)
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          (fill (type none))
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          (fill (type none))
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        (pin passive line (at -5.08 7.62 0) (length 3.81)
          (name "Pin_1")
          (number "1")
        )
        (pin passive line (at -5.08 5.08 0) (length 3.81)
          (name "Pin_2")
          (number "2")
        )
        (pin passive line (at -5.08 2.54 0) (length 3.81)
          (name "Pin_3")
          (number "3")
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        (pin passive line (at -5.08 0 0) (length 3.81)
          (name "Pin_4")
          (number "4")
        )
        (pin passive line (at -5.08 -2.54 0) (length 3.81)
          (name "Pin_5")
          (number "5")
        )
        (pin passive line (at -5.08 -5.08 0) (length 3.81)
          (name "Pin_6")
          (number "6")
        )
        (pin passive line (at -5.08 -7.62 0) (length 3.81)
          (name "Pin_7")
          (number "7")
        )
        (pin passive line (at -5.08 -10.16 0) (length 3.81)
          (name "Pin_8")
          (number "8")
        )
      )
    )
    (symbol "Converter_DCDC:TC7662AxPA" (in_bom yes) (on_board yes)
      (property "Reference" "U" (id 0) (at -6.35 11.43 0))
      (property "Value" "TC7662AxPA" (id 1) (at 7.62 11.43 0))
      (property "Footprint" "Package_DIP:DIP-8_W7.62mm" (id 2) (at 2.54 -2.54 0))
      (property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/21468B.pdf" (id 3) (at 2.54 -2.54 0))
      (property "ki_keywords" "charge pump DC-to-DC converter" (id 4) (at 0 0 0))
      (property "ki_description" "Charge Pump DC-to-DC Converter, 3 - 18V, 40mA, DIP-8" (id 5) (at 0 0 0))
      (property "ki_fp_filters" "DIP*W7.62mm*" (id 6) (at 0 0 0))
      (symbol "TC7662AxPA_0_1"
        (rectangle (start -7.62 10.16) (end 7.62 -10.16)
          (fill (type background))
        )
      )
      (symbol "TC7662AxPA_1_1"
        (pin no_connect line (at -7.62 5.08 0) (length 2.54) hide
          (name "NC")
          (number "1")
        )
        (pin passive line (at 10.16 2.54 180) (length 2.54)
          (name "CAP+")
          (number "2")
        )
        (pin power_in line (at 0 -12.7 90) (length 2.54)
          (name "GND")
          (number "3")
        )
        (pin passive line (at 10.16 -7.62 180) (length 2.54)
          (name "CAP-")
          (number "4")
        )
        (pin power_out line (at 10.16 7.62 180) (length 2.54)
          (name "VOUT")
          (number "5")
        )
        (pin passive line (at -10.16 -5.08 0) (length 2.54)
          (name "NC")
          (number "6")
        )
        (pin passive line (at -10.16 0 0) (length 2.54)
          (name "OSC")
          (number "7")
        )
        (pin power_in line (at 0 12.7 270) (length 2.54)
          (name "VDD")
          (number "8")
        )
      )
    )
    (symbol "Device:C" (pin_numbers hide) (pin_names (offset 0.254)) (in_bom yes) (on_board yes)
      (property "Reference" "C" (id 0) (at 0.635 2.54 0))
      (property "Value" "C" (id 1) (at 0.635 -2.54 0))
      (property "Footprint" "" (id 2) (at 0.9652 -3.81 0))
      (property "Datasheet" "~" (id 3) (at 0 0 0))
      (property "ki_keywords" "cap capacitor" (id 4) (at 0 0 0))
      (property "ki_description" "Unpolarized capacitor" (id 5) (at 0 0 0))
      (property "ki_fp_filters" "C_*" (id 6) (at 0 0 0))
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        (pin passive line (at 0 3.81 270) (length 2.794)
          (name "~")
          (number "1")
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          (name "~")
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    )
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      (property "Datasheet" "~" (id 3) (at 0 0 0))
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        (pin passive line (at 0 3.81 270) (length 2.794)
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    )
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      (property "Value" "R_Potentiometer_Trim_US" (id 1) (at -2.54 0 90))
      (property "Footprint" "" (id 2) (at 0 0 0))
      (property "Datasheet" "~" (id 3) (at 0 0 0))
      (property "ki_keywords" "resistor variable trimpot trimmer" (id 4) (at 0 0 0))
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      (property "ki_fp_filters" "Potentiometer*" (id 6) (at 0 0 0))
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    )
    (path
      (reference "J4") (unit 1) (value "Conn_01x08_Female") (footprint "Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical")
    )
    (path
      (reference "R1") (unit 1) (value "1k") (footprint "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal")
    )
    (path
      (reference "R2") (unit 1) (value "5k") (footprint "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal")
    )
    (path
      (reference "R3") (unit 1) (value "5k") (footprint "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal")
    )
    (path
      (reference "R4") (unit 1) (value "2.2k") (footprint "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal")
    )
    (path
      (reference "R5") (unit 1) (value "5k") (footprint "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal")
    )
    (path
      (reference "RV1") (unit 1) (value "10k") (footprint "Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical")
    )
    (path
      (reference "U1") (unit 1) (value "TL431LP") (footprint "Package_TO_SOT_THT:TO-92_Inline")
    )
    (path
      (reference "U_8bitDac1") (unit 1) (value "DAC0808_DIP") (footprint "Package_DIP:DIP-16_W7.62mm")
    )
    (path
      (reference "U_NegativeVoltage1") (unit 1) (value "TC7662AxPA") (footprint "Package_DIP:DIP-8_W7.62mm")
    )
    (path
      (reference "U_OutputAmp1") (unit 1) (value "LF356") (footprint "Package_DIP:DIP-8_W7.62mm")
    )
  )
)
