Create a schematic for I2C expansion. 

libSymbols:
- Device:C_Small
- Interface_Expansion:PCF8574A
- power:+3V3
- power:GND
schematicSymbols:
- libraryNickname: power
  entryName: +3V3
  position:
    x: 142.875
    y: 64.135
    angle: 0
  properties:
  - key: Reference
    value: '#PWR0126'
    position:
      x: 142.875
      y: 67.945
      angle: 0
  - key: Value
    value: +3V3
    position:
      x: 142.875
      y: 58.42
      angle: 0
- libraryNickname: power
  entryName: GND
  position:
    x: 142.875
    y: 106.045
    angle: 0
  properties:
  - key: Reference
    value: '#PWR0127'
    position:
      x: 142.875
      y: 112.395
      angle: 0
  - key: Value
    value: GND
    position:
      x: 142.875
      y: 111.125
      angle: 0
- libraryNickname: power
  entryName: GND
  position:
    x: 124.46
    y: 91.44
    angle: 0
  properties:
  - key: Reference
    value: '#PWR0125'
    position:
      x: 124.46
      y: 97.79
      angle: 0
  - key: Value
    value: GND
    position:
      x: 125.095
      y: 95.25
      angle: 0
- libraryNickname: power
  entryName: GND
  position:
    x: 113.665
    y: 64.77
    angle: 0
  properties:
  - key: Reference
    value: '#PWR0124'
    position:
      x: 113.665
      y: 71.12
      angle: 0
  - key: Value
    value: GND
    position:
      x: 114.3
      y: 68.58
      angle: 0
- libraryNickname: Device
  entryName: C_Small
  position:
    x: 107.95
    y: 61.595
    angle: 0
  properties:
  - key: Reference
    value: C74
    position:
      x: 111.125
      y: 60.3312
      angle: 0
  - key: Value
    value: 100nF
    position:
      x: 111.125
      y: 62.8712
      angle: 0
- libraryNickname: power
  entryName: +3V3
  position:
    x: 113.665
    y: 57.15
    angle: 0
  properties:
  - key: Reference
    value: '#PWR0123'
    position:
      x: 113.665
      y: 60.96
      angle: 0
  - key: Value
    value: +3V3
    position:
      x: 113.665
      y: 51.435
      angle: 0
- libraryNickname: Device
  entryName: C_Small
  position:
    x: 119.38
    y: 61.595
    angle: 0
  properties:
  - key: Reference
    value: C75
    position:
      x: 122.555
      y: 60.3312
      angle: 0
  - key: Value
    value: 100nF
    position:
      x: 122.555
      y: 62.8712
      angle: 0
- libraryNickname: Interface_Expansion
  entryName: PCF8574A
  position:
    x: 142.875
    y: 88.265
    angle: 0
  properties:
  - key: Reference
    value: U7
    position:
      x: 144.8944
      y: 67.31
      angle: 0
  - key: Value
    value: PCF8574A
    position:
      x: 144.8944
      y: 69.85
      angle: 0
junctions:
- position:
    x: 113.665
    y: 64.135
    angle: 0
- position:
    x: 126.365
    y: 88.265
    angle: 0
- position:
    x: 113.665
    y: 57.15
    angle: 0
noConnects:
- position:
    x: 130.175
    y: 98.425
    angle: null
busEntries: []
graphicalItems:
- type: wire
  points:
  - x: 155.575
    y: 83.185
  - x: 164.465
    y: 83.185
- type: wire
  points:
  - x: 76.2
    y: 80.645
  - x: 130.175
    y: 80.645
- type: wire
  points:
  - x: 119.38
    y: 57.15
  - x: 119.38
    y: 59.055
- type: wire
  points:
  - x: 155.575
    y: 93.345
  - x: 164.465
    y: 93.345
- type: wire
  points:
  - x: 113.665
    y: 64.135
  - x: 107.95
    y: 64.135
- type: wire
  points:
  - x: 107.95
    y: 59.055
  - x: 107.95
    y: 57.15
- type: wire
  points:
  - x: 164.465
    y: 80.645
  - x: 155.575
    y: 80.645
- type: wire
  points:
  - x: 164.465
    y: 85.725
  - x: 155.575
    y: 85.725
- type: wire
  points:
  - x: 119.38
    y: 64.135
  - x: 113.665
    y: 64.135
- type: wire
  points:
  - x: 76.2
    y: 78.105
  - x: 130.175
    y: 78.105
- type: wire
  points:
  - x: 107.95
    y: 57.15
  - x: 113.665
    y: 57.15
- type: wire
  points:
  - x: 142.875
    y: 64.135
  - x: 142.875
    y: 70.485
- type: wire
  points:
  - x: 164.465
    y: 95.885
  - x: 155.575
    y: 95.885
- type: wire
  points:
  - x: 113.665
    y: 64.135
  - x: 113.665
    y: 64.77
- type: wire
  points:
  - x: 124.46
    y: 88.265
  - x: 124.46
    y: 91.44
- type: wire
  points:
  - x: 126.365
    y: 88.265
  - x: 126.365
    y: 90.805
- type: wire
  points:
  - x: 113.665
    y: 57.15
  - x: 119.38
    y: 57.15
- type: wire
  points:
  - x: 164.465
    y: 90.805
  - x: 155.575
    y: 90.805
- type: wire
  points:
  - x: 155.575
    y: 88.265
  - x: 164.465
    y: 88.265
- type: wire
  points:
  - x: 126.365
    y: 90.805
  - x: 130.175
    y: 90.805
- type: wire
  points:
  - x: 155.575
    y: 78.105
  - x: 164.465
    y: 78.105
- type: wire
  points:
  - x: 126.365
    y: 88.265
  - x: 124.46
    y: 88.265
- type: wire
  points:
  - x: 126.365
    y: 85.725
  - x: 126.365
    y: 88.265
- type: wire
  points:
  - x: 126.365
    y: 88.265
  - x: 130.175
    y: 88.265
- type: wire
  points:
  - x: 130.175
    y: 85.725
  - x: 126.365
    y: 85.725
globalLabels: []
sheetInstances: []
