Description
ULN2003 Darlington Transistor Array IC (SMD Package) – High Current Driver IC for Stepper Motor, Relay, LEDs, Solenoid, Industrial Control
The ULN2003 is a popular and powerful Darlington Transistor Array IC specially designed for interfacing high current loads with low current microcontrollers like Arduino, Raspberry Pi, STM32, ESP32, PIC, AVR, etc.
If you are into Electronics Projects, Robotics, Automation or Industrial Control, this IC will be super helpful for you! 😎
Features & Advantages ✅
- 🔧 7-Channel high-current driver (can run multiple loads)
- 🔌 Can drive Stepper Motors, Relays, LEDs, Solenoids, Lamps etc.
- ⚡ Works with 5V logic from controller side & delivers high current output
- 🧱 Internal back EMF protection – safe for inductive loads like motor/solenoid
- 🪶 Compact SMD Package – perfect for small-size design / PCB integration
- 🤝 Compatible with most DIY boards and controllers
Why ULN2003 is Used?
Microcontrollers can only give small current output (5V/3.3V logic). They cannot directly run motors or relays.
ULN2003 works like a current amplifier – small controller signal → big load output. 👍
Specification Table
| Parameter | Details |
|---|---|
| Model | ULN2003 |
| Package Type | SMD |
| Channels | 7 Darlington Transistor Channels |
| Input Voltage | 3.3V to 5V Logic Compatible |
| Max Output Current per Channel | up to 500mA (approx.) |
| Usage | Motor/Relay/LED/Solenoid Driver |
| Back EMF Protection | Yes (built-in diodes) |
Applications 📌
- Stepper Motor Driving
- Relay Control Projects
- LED / Lamp / Light Control
- solenoid / buzzer Control
- Industrial Automation Systems
- Robotics & DIY Electronics Projects
- MCU Level Output to higher current load conversion
Who Should Buy?
Students, Technicians, DIY Makers, Robotic projects builders, Industrial controller designers.
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