The LM2596 DC-DC Step Down Converter Buck Module with LED Digital Display is a high-efficiency adjustable voltage regulator designed for converting higher DC voltages into stable lower output voltages. Featuring an integrated LED digital voltmeter, this module allows real-time voltage monitoring, making it ideal for electronics projects, Arduino systems, battery-powered devices, robotics, industrial automation, laboratory testing, solar power systems, and embedded applications.

Built around the reliable LM2596 switching regulator IC, this buck converter delivers up to 3A output current with conversion efficiency up to 92%. The onboard multi-turn potentiometer enables precise voltage adjustment, while the LED display simplifies voltage measurement without requiring an external multimeter.

Its compact design, wide input voltage range, and built-in protection features make it one of the most popular DC-DC step-down modules for engineers, students, makers, repair technicians, and electronics enthusiasts in Bangladesh.

Features:

• LM2596 adjustable DC-DC buck converter module

• Built-in LED digital voltmeter for real-time voltage monitoring

• Adjustable output voltage via onboard precision potentiometer

• High conversion efficiency up to 92%

• Wide input voltage support from 4V to 40V DC

• Stable and regulated output voltage

• Maximum output current up to 3A

• Thickened PCB design for improved durability

• High-quality solid-state capacitors for reliable operation

• Short-circuit protection for enhanced safety

• Over-temperature protection

• Compact and lightweight design

• Suitable for battery charging and power management projects

• Compatible with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and other microcontrollers

• Easy installation and operation

• Ideal for DIY electronics, industrial control systems, and laboratory use

Specifications:

• Model: LM2596 Digital Voltmeter Buck Converter

• Converter Type: DC-DC Step Down (Buck)

• Input Voltage: DC 4V – 40V

• Output Voltage: DC 1.5V – 35V Adjustable

• Maximum Output Current: 3A

• Recommended Continuous Current: ≤2A

• Maximum Conversion Efficiency: 92%

• Switching Frequency: 150KHz

• Display Type: LED Digital Voltmeter

• Operating Temperature: -45°C to +85°C

• Protection Features: Short Circuit Protection, Over Temperature Protection

• Dimensions: 57 × 36 × 13 mm

• Weight: Approximately 21g

How to Use:

• Connect the DC power source to the input terminals

• Ensure input voltage is at least 1.5V higher than the desired output voltage

• Power on the module

• Rotate the onboard potentiometer to adjust the output voltage

• Monitor voltage directly using the integrated LED display

• Verify the output voltage before connecting sensitive devices

• Connect the load to the output terminals after voltage adjustment

• Keep the output current within recommended limits for reliable operation

• Use additional cooling when operating at higher current levels

Digital Voltmeter Calibration:

• Short press the ON/OFF button to turn the voltmeter on

• Long press the ON/OFF button for 1–4 seconds to turn it off

• Long press for more than 4 seconds to enter calibration mode

• The "IN" indicator lights for input voltage calibration

• Long press the Mode button for more than 2 seconds to switch to output voltage calibration

• Use adjustment buttons to increase or decrease calibration values

• Long press the Mode button again to save settings permanently

• Calibration values remain stored after power loss

Important Notes:

• Input voltage must always be higher than output voltage

• This module only steps voltage down and cannot boost voltage

• Never reverse input or output polarity

• Maximum output current is 3A

• Continuous operation is recommended below 2A for long-term stability

• Use proper heat dissipation under heavy loads

• Always verify voltage before connecting electronic devices

Applications:

• Arduino power supply projects

• ESP32 and ESP8266 development boards

• Raspberry Pi voltage regulation

• STM32 microcontroller systems

• Solar power systems

• Battery-powered electronics

• Robotics and automation projects

• Automotive electronics

• LED lighting systems

• DIY adjustable power supplies

• Industrial automation circuits

• Embedded system development

• Electronic repair and testing

• Portable electronic devices

• Laboratory and educational projects

Package Includes:

• 1 × LM2596 DC-DC Step Down Converter Buck Module with LED Digital Display

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