ULN 2002

The ULN 2002 is a versatile high-voltage, high-current Darlington transistor array designed for driving motors, relays, solenoids, and other inductive loads. Its compact design simplifies interfacing with microcontrollers and logic-level drivers, offering robust performance for a wide range of automation and embedded projects. 7 Darlington pairs capable of handling up to 500 mA per channel for strong drive capability. 50 V maximum voltage rating for reliable operation in demanding applications. Built-in freewheeling diodes to protect against inductive load voltage spikes. Common-cathode clamp diodes integrated to safeguard circuitry from back EMF. Standard 16-pin DIP package for easy breadboard and PCB integration during prototyping. Compared with simpler transistor arrays, the ULN 2002 provides improved protection and higher current handling, making it suitable for both industrial and hobbyist use. The integrated clamp and freewheeling diodes reduce the need for external protection components, streamlining circuit design and saving board space. The device’s Darlington configuration amplifies input signals with minimal additional power loss, enabling efficient motor control from microcontroller outputs and TTL/CMOS logic levels. Its combination of drive capability, integrated protection, and compact footprint makes the ULN 2002 a dependable choice for controlling stepper motors, relays, and solenoids in embedded systems and automation projects.