The LM2596 DC-DC Step-Down Converter with Digital Display is an upgraded version of the classic buck regulator, combining high-efficiency voltage conversion with a built-in voltmeter. At Electrapac, we recommend this module for builders who want a professional "bench-top" power experience without needing a separate multimeter to check their settings.

Product Overview

This module features the reliable LM2596 switching regulator capable of driving a 3A load with excellent linearity and load regulation. The standout feature is the integrated 3-digit LED display, which can show either the Input Voltage or the Output Voltage at the touch of a button. It also includes a "Self-Calibration" mode to ensure the digital readout is perfectly accurate.

Key Features for Electrapac Customers

• Real-Time Monitoring: Toggle between input and output voltage displays with the onboard tactile switch. A dedicated LED indicator tells you which one is currently being shown.

• Touch-Button Control: Easily turn the voltmeter display on or off to save power by holding the button for 2 seconds.

• Screw Terminal Connections: No soldering is required! The board comes with heavy-duty screw terminals for secure and easy wiring of your Electrapac projects.

• Precision Potentiometer: Use the multi-turn trimpot to dial in sensitive voltages like 3.3V, 5V, or 12V with high resolution.

• High-Voltage Range: Supports up to 40V input, making it ideal for 24V industrial systems or 36V e-bike battery applications.

How to Operate & Calibrate

To get the most out of your module:

1. Switching Display: Short-press the button to toggle between input voltage (V_in) and output voltage (V_out).

2. Calibration Mode: * Set the display to the voltage you want to calibrate (e.g., Output).

   • Hold the button for over 2 seconds until the display flashes.

   • Short-press the button to increase or decrease the value in 0.1V increments until it matches your multimeter.

   • Hold for 2 seconds again to save the setting.

3. Voltage Differential: For the buck converter to work, the input voltage must be at least 1.5V higher than the desired output.

Primary Applications

• DIY Lab Power Supplies: A great base for a small, portable power station with a built-in display.

• Electronic Repair: Safely powering 5V or 9V circuit boards from a 19V laptop power brick.

• Battery Regulation: Stepping down 12V or 24V battery packs for microcontrollers and sensors.

• Vehicle Electronics: Powering 5V USB chargers or 12V dashcams from a 24V truck or boat system.

• LED Driver: Providing constant voltage for high-power LED strips and arrays.

Why Shop at Electrapac?

We source our LM2596 Display Modules with low-ESR electrolytic capacitors to minimize output noise and ripple. At www.electrapac.com, we provide the components that give you both the power and the precision needed for modern electronics.