LM2596S Step-Down DC-DC Buck Converter with 3-Digit Digital Display

The LM2596S Step-Down DC-DC Buck Converter with 3-Digit Digital Display is a high-efficiency voltage regulator that not only delivers a stable, adjustable DC output but also includes a built-in LED voltmeter for real-time voltage monitoring. Ideal for DIY power supplies, IoT projects, and embedded electronics, this module provides a convenient and precise way to set and view output voltage without needing an external multimeter.

Designed around the LM2596S switching regulator IC, it converts a higher DC input down to a safe, user-defined level, making it a reliable choice for powering Arduino boards, Raspberry Pi, LED strips, robotics, and portable electronics.

🔹 Key Features

• Wide Input Range: Accepts 4.5 V–40 V DC for versatile applications.

• Adjustable Output: 1.25 V–37 V DC, fine-tuned using a precision potentiometer.

• High Output Current: Up to 3 A continuous (4 A peak with proper heat dissipation).

• Integrated 3-Digit LED Voltmeter: Displays real-time output voltage for quick adjustment.

• High Efficiency: Up to 92%, minimizing heat and power loss.

• Built-In Protections: Short-circuit, thermal, and overcurrent protection ensure safety.

🔹 Technical Specifications

• Regulator IC: LM2596S

• Input Voltage: 4.5 V – 40 V DC

• Output Voltage: 1.25 V – 37 V DC (adjustable)

• Max Output Current: 3 A continuous (recommend heatsink for >2 A)

• Display: 3-digit red LED, ±0.1 V accuracy

• Conversion Efficiency: Up to 92%

• Switching Frequency: ~150 kHz

• Ripple: <30 mV

• Operating Temperature: –40 °C to +85 °C

• Dimensions: ~60 mm × 26 mm × 14 mm

🔹 Applications & Use Cases

• DIY Bench Power Supplies: Adjustable output with built-in voltmeter for quick voltage checks.

• Arduino & IoT Projects: Provide regulated power to microcontrollers and sensors.

• LED Lighting: Drive LED strips from 12 V or 24 V sources.

• Robotics & Drones: Power motors and controllers efficiently.

• Automotive & Industrial: Step down car battery or industrial DC supplies to lower voltages.

🔹 Advantages for Makers & Engineers

• No separate voltmeter required—integrated display saves space.

• Easy screw-terminal or solder pad connections.

• Compatible with Electronics Components and Tools and Accessories for seamless integration.

🔹 Safety & Precautions

• Calibrate the voltmeter if precise measurements are required.

• Do not exceed 40 V input or 3 A continuous output without adequate cooling.

• Adjust output voltage before connecting sensitive electronics.

🔗 Helpful Internal Links

• Explore more Power Supply modules.

• Pair with Arduino and Accessories for embedded projects.

• Check related Electronics Components for sensors and add-ons.

🎥 Video Tutorial

[YouTube tutorial link here]

📝 Product Summary

The LM2596S Step-Down Buck Converter with 3-Digit Digital Display delivers adjustable 1.25 V–37 V output at up to 3 A, featuring a built-in voltmeter for easy voltage monitoring—perfect for DIY power supplies, Arduino, Raspberry Pi, and IoT applications.