Description of ULN2003:
The ULN2003 is a high voltage, high current darlington array containing seven
open collector darlington pairs with common emitters. Each channel is rated at
500mA and can withstand peak currents of 600mA. Suppression diodes are
included for inductive load driving and the inputs are pinned opposite to the
outputs to simplify board layout.
This versatile device is useful for driving a wide
range of loads including solenoids, relays DC motors, LED displays filament
lamps, thermal printheads band high power buffer.