ULN2803A Applications

Control up to eight low-voltage relay coils, with the load supply tied to COM for flyback suppression.

Sequence coil sinks with the winding common at the positive supply. A bipolar motor needs a different drive arrangement.

Switch current-limited LEDs or lamps while allowing for inrush and the Darlington voltage drop.

Find ULN2803A in the Components Library to place its schematic symbol and connect its pins.