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The uULN2803 is an integrated circuit that functions as a high-voltage, high-current Darlington transistor array. It typically contains eight open-collector outputs, allowing it to control multiple loads, such as relays, lamps, or motors, using a low-voltage logic signal. The device is commonly used in applications requiring the interfacing of microcontrollers with higher power devices. Its built-in flyback diodes also provide protection against back EMF generated by inductive loads.
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