(kicad_sch (version 20230121) (generator "custom_generator")

  (uuid "391da8c7-7217-4ed9-a918-95efab6bbe33")
  (paper "A3")

  (title_block
    (title "Baby Mobile Audio Board")
    (date "2026-03-08")
    (rev "1.0")
    (comment 1 "ATmega328P + W25Q128 + PAM8302A")
    (comment 2 "2xAA Battery Powered - Long Runtime Design")
    (comment 3 "8-ohm 0.25W Speaker, DC Motor, 8 Buttons")
    (comment 4 "Arduino Compatible (8MHz Internal Osc)")
  )

  (lib_symbols

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      (property "Value" "ATmega328P-AU" (at 0 24 0) (effects (font (size 1.27 1.27))))
      (property "Footprint" "Package_QFP:TQFP-32_7x7mm_P0.8mm" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
      (symbol "ATmega328P-AU_0_1"
        (rectangle (start -17 23) (end 17 -23) (stroke (width 0.254) (type default)) (fill (type background)))
      )
      (symbol "ATmega328P-AU_1_1"
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        (pin power_in line (at -5 -26 90) (length 3) (name "GND2" (effects (font (size 1 1)))) (number "5" (effects (font (size 1 1)))))
        (pin power_in line (at -3 26 270) (length 3) (name "VCC" (effects (font (size 1 1)))) (number "4" (effects (font (size 1 1)))))
        (pin power_in line (at -1 26 270) (length 3) (name "AVCC" (effects (font (size 1 1)))) (number "6" (effects (font (size 1 1)))))
        (pin passive line (at 1 26 270) (length 3) (name "AREF" (effects (font (size 1 1)))) (number "21" (effects (font (size 1 1)))))
        (pin bidirectional line (at -20 15 0) (length 3) (name "PD0/RXD" (effects (font (size 1 1)))) (number "30" (effects (font (size 1 1)))))
        (pin bidirectional line (at -20 12.5 0) (length 3) (name "PD1/TXD" (effects (font (size 1 1)))) (number "31" (effects (font (size 1 1)))))
        (pin bidirectional line (at -20 10 0) (length 3) (name "PD2/INT0" (effects (font (size 1 1)))) (number "32" (effects (font (size 1 1)))))
        (pin bidirectional line (at -20 7.5 0) (length 3) (name "PD3/INT1" (effects (font (size 1 1)))) (number "1" (effects (font (size 1 1)))))
        (pin bidirectional line (at -20 5 0) (length 3) (name "PD4" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
        (pin bidirectional line (at -20 2.5 0) (length 3) (name "PD5/OC0B" (effects (font (size 1 1)))) (number "9" (effects (font (size 1 1)))))
        (pin bidirectional line (at -20 0 0) (length 3) (name "PD6/OC0A" (effects (font (size 1 1)))) (number "10" (effects (font (size 1 1)))))
        (pin bidirectional line (at -20 -2.5 0) (length 3) (name "PD7" (effects (font (size 1 1)))) (number "11" (effects (font (size 1 1)))))
        (pin bidirectional line (at 20 15 180) (length 3) (name "PB0" (effects (font (size 1 1)))) (number "12" (effects (font (size 1 1)))))
        (pin bidirectional line (at 20 12.5 180) (length 3) (name "PB1/OC1A" (effects (font (size 1 1)))) (number "13" (effects (font (size 1 1)))))
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      )
    )

    (symbol "baby_mobile:W25Q128" (in_bom yes) (on_board yes)
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      (property "Value" "W25Q128JVSIQ" (at 0 7 0) (effects (font (size 1.27 1.27))))
      (property "Footprint" "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
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      )
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        (pin output line (at -10 1.5 0) (length 3) (name "DO/IO1" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
        (pin input line (at -10 -1.5 0) (length 3) (name "~{WP}/IO2" (effects (font (size 1 1)))) (number "3" (effects (font (size 1 1)))))
        (pin power_in line (at -10 -4 0) (length 3) (name "GND" (effects (font (size 1 1)))) (number "4" (effects (font (size 1 1)))))
        (pin input line (at 10 -4 180) (length 3) (name "DI/IO0" (effects (font (size 1 1)))) (number "5" (effects (font (size 1 1)))))
        (pin input line (at 10 -1.5 180) (length 3) (name "CLK" (effects (font (size 1 1)))) (number "6" (effects (font (size 1 1)))))
        (pin input line (at 10 1.5 180) (length 3) (name "~{HOLD}/IO3" (effects (font (size 1 1)))) (number "7" (effects (font (size 1 1)))))
        (pin power_in line (at 10 4 180) (length 3) (name "VCC" (effects (font (size 1 1)))) (number "8" (effects (font (size 1 1)))))
      )
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      (property "Footprint" "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
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      )
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        (pin power_in line (at -11 2 0) (length 3) (name "VDD" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
        (pin power_in line (at -11 -1 0) (length 3) (name "GND" (effects (font (size 1 1)))) (number "3" (effects (font (size 1 1)))))
        (pin input line (at -11 -4 0) (length 3) (name "A+" (effects (font (size 1 1)))) (number "4" (effects (font (size 1 1)))))
        (pin input line (at -11 -7 0) (length 3) (name "A-" (effects (font (size 1 1)))) (number "5" (effects (font (size 1 1)))))
        (pin output line (at 11 2 180) (length 3) (name "VO+" (effects (font (size 1 1)))) (number "8" (effects (font (size 1 1)))))
        (pin output line (at 11 -1 180) (length 3) (name "VO-" (effects (font (size 1 1)))) (number "7" (effects (font (size 1 1)))))
        (pin power_in line (at 11 -4 180) (length 3) (name "PAD" (effects (font (size 1 1)))) (number "6" (effects (font (size 1 1)))))
      )
    )

    (symbol "baby_mobile:NMOS" (in_bom yes) (on_board yes)
      (property "Reference" "Q" (at 3 0 0) (effects (font (size 1.27 1.27))))
      (property "Value" "AO3400A" (at 5 -2.5 0) (effects (font (size 1.27 1.27))))
      (property "Footprint" "Package_TO_SOT_SMD:SOT-23" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
      (symbol "NMOS_0_1"
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        (polyline (pts (xy -0.5 -2) (xy -0.5 2)) (stroke (width 0.254) (type default)) (fill (type none)))
        (polyline (pts (xy 0 -2.5) (xy 0 -1.5)) (stroke (width 0) (type default)) (fill (type none)))
        (polyline (pts (xy 0 1.5) (xy 0 2.5)) (stroke (width 0) (type default)) (fill (type none)))
        (polyline (pts (xy 0 0) (xy -1.5 0)) (stroke (width 0) (type default)) (fill (type none)))
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      (symbol "NMOS_1_1"
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        (pin input line (at -4 0 0) (length 2.5) (name "G" (effects (font (size 1 1)))) (number "1" (effects (font (size 1 1)))))
        (pin passive line (at 0 -5 90) (length 2.5) (name "S" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
      )
    )

    (symbol "baby_mobile:Capacitor" (in_bom yes) (on_board yes)
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      (property "Footprint" "" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
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        (polyline (pts (xy -1.5 -1) (xy 1.5 -1)) (stroke (width 0.4) (type default)) (fill (type none)))
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        (pin passive line (at 0 -3.5 90) (length 2.5) (name "2" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
      )
    )

    (symbol "baby_mobile:Resistor" (in_bom yes) (on_board yes)
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      (property "Value" "R" (at 2 -2 0) (effects (font (size 1.27 1.27))))
      (property "Footprint" "" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) hide))
      (symbol "Resistor_0_1"
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      )
      (symbol "Resistor_1_1"
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        (pin passive line (at 0 -5 90) (length 2.5) (name "2" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
      )
    )

    (symbol "baby_mobile:Diode_Schottky" (in_bom yes) (on_board yes)
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        (pin passive line (at 0 -3.5 90) (length 2.5) (name "K" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
      )
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        (arc (start 0 -1.25) (mid 0.75 -1.875) (end 0 -2.5) (stroke (width 0.254) (type default)) (fill (type none)))
      )
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        (pin passive line (at 0 -5 90) (length 2.5) (name "2" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
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        (pin passive line (at -5 -1.5 0) (length 3) (name "2" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
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        (pin passive line (at -5 0 0) (length 3) (name "2" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
        (pin passive line (at -5 -2.5 0) (length 3) (name "3" (effects (font (size 1 1)))) (number "3" (effects (font (size 1 1)))))
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      (symbol "Conn_6Pin_1_1"
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        (pin passive line (at 6 5 180) (length 3) (name "VCC" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))
        (pin passive line (at -6 0 0) (length 3) (name "SCK" (effects (font (size 1 1)))) (number "3" (effects (font (size 1 1)))))
        (pin passive line (at 6 0 180) (length 3) (name "MOSI" (effects (font (size 1 1)))) (number "4" (effects (font (size 1 1)))))
        (pin passive line (at -6 -5 0) (length 3) (name "~{RST}" (effects (font (size 1 1)))) (number "5" (effects (font (size 1 1)))))
        (pin passive line (at 6 -5 180) (length 3) (name "GND" (effects (font (size 1 1)))) (number "6" (effects (font (size 1 1)))))
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      )
      (symbol "PWR_FLAG_1_1"
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    (property "Reference" "J1" (at 25 32 0) (effects (font (size 1.27 1.27))))
    (property "Value" "BATTERY" (at 25 38 0) (effects (font (size 1.27 1.27))))
    (property "Footprint" "Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal" (at 25 35 0) (effects (font (size 1.27 1.27)) hide))
    (property "Datasheet" "" (at 25 35 0) (effects (font (size 1.27 1.27)) hide))
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