Content for ULN2003

ULN2003

The ULN2003 is one of the most common motor driver ICs that houses an array of 7 Darlington transistor pairs, each capable of driving loads up to 500mA and 50V. Basically, a Darlington pair is a pair of transistors, where the second transistor amplifies the output current of the first transistor. The ULN2003 IC is needed to drive the motor with an Arduino, but they come in convenient and cheap driver boards that are readily available complete with indicator LEDs. So it’s better to grab one of these rather than breadboarding the IC itself.

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