ULN2003 IC DIP Stepper Motor Drive
The ULN2003 IC is a Darlington transistor array driver IC that can sink up to 500mA per channel and handle voltages up to 50V. With 7 open-collector outputs, it is widely used to drive stepper motors, relays, LEDs, solenoids, and other inductive loads.
Its built-in clamp diodes provide protection against back EMF when driving inductive components, ensuring safe and reliable operation. The ULN2003 is frequently used in Arduino and microcontroller-based projects, as it allows low-power logic circuits to control high-power loads with ease.
🔹 Applications
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Stepper motor driver for robotics and automation
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Relay driver in control systems
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LED display and lamp drivers
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Solenoid and buzzer drivers
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Printer head drivers
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Arduino, NodeMCU, and Raspberry Pi projects
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Industrial automation and DIY electronics
🔹 Precautions
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Do not exceed 500mA per channel or 50V supply voltage
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Ensure proper heat dissipation when driving multiple channels at high load
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Use correct wiring to prevent reverse polarity damage
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Provide external power supply for motors/relays (not from microcontroller directly)
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Handle IC carefully to avoid ESD damage
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Always connect common ground between driver and control circuits
🔹 Technical Specifications
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IC Type: Darlington Transistor Array Driver
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Package: DIP-16
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Number of Channels: 7
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Output Current (per channel): 500mA max
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Output Voltage: Up to 50V
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Input Compatibility: TTL, CMOS, and microcontrollers
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Protection: Built-in clamp diodes for inductive loads
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Logic Input Current: Low, microcontroller friendly
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Pin Count: 16 pins
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Operating Temperature Range: -20°C to +85°C
📹 Tutorial Video
Watch ULN2003 Stepper Motor Driver Tutorial
🔹 Related Categories
🔹 Summary
The ULN2003 IC (DIP-16) is a powerful Darlington transistor array driver that enables microcontrollers like Arduino and Raspberry Pi to control stepper motors, relays, LEDs, and solenoids with ease. With its 7 channels, high current capacity, and built-in protection diodes, it is an essential IC for robotics, automation, and DIY electronics projects. Add it to your IC’s toolkit for reliable motor and relay control.
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