ULN2803A instead of 8 x 2SA1175 transistors?

[AtomicRPM]

Keyboard Interface using ULN2803A

Wiring:

1. Inputs to ULN2803A:

   • A10 → IN1 (ULN2803A Pin 1)
   • A9 → IN2 (ULN2803A Pin 2)
   • A12 → IN3 (ULN2803A Pin 3)
   • A13 → IN4 (ULN2803A Pin 4)
   • A8 → IN5 (ULN2803A Pin 5)
   • A15 → IN6 (ULN2803A Pin 6)
   • A14 → IN7 (ULN2803A Pin 7)
   • A11 → IN8 (ULN2803A Pin 8)

2. Outputs from ULN2803A:

   • OUT1 (ULN2803A Pin 18) → J4 Pin 1
   • OUT2 (ULN2803A Pin 17) → J4 Pin 2
   • OUT3 (ULN2803A Pin 16) → J4 Pin 3
   • OUT4 (ULN2803A Pin 15) → J4 Pin 4
   • OUT5 (ULN2803A Pin 14) → J4 Pin 5
   • OUT6 (ULN2803A Pin 13) → J4 Pin 6
   • OUT7 (ULN2803A Pin 12) → J4 Pin 7
   • OUT8 (ULN2803A Pin 11) → J4 Pin 8

3. Common Connections:

   • ULN2803A Pin 9 (GND) → Ground
   • ULN2803A Pin 10 (COM) → +3.3V