---
product_id: 149705426
title: "2 Pack LM2596 DC to DC Voltage Regulator 4-40V to 1.5-35V Buck Converter with LED Display"
brand: "valefod"
price: "€ 23.59"
currency: EUR
in_stock: true
reviews_count: 8
category: "Valefod"
url: https://www.desertcart.it/products/149705426-2-pack-lm2596-dc-to-dc-voltage-regulator-4-40v
store_origin: IT
region: Italy
---

# Input 4-40V DC 3A max current Output 1.5-35V adjustable 2 Pack LM2596 DC to DC Voltage Regulator 4-40V to 1.5-35V Buck Converter with LED Display

**Brand:** valefod
**Price:** € 23.59
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your projects with precision and style — don’t get left in the voltage dark!

## Quick Answers

- **What is this?** 2 Pack LM2596 DC to DC Voltage Regulator 4-40V to 1.5-35V Buck Converter with LED Display by valefod
- **How much does it cost?** € 23.59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/149705426-2-pack-lm2596-dc-to-dc-voltage-regulator-4-40v)

## Best For

- valefod enthusiasts

## Why This Product

- Trusted valefod brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable & Protected:** Short circuit & over-temperature safeguards keep your projects safe and running.
- • **Dynamic Voltage Range:** Seamlessly adjust output from 1.5V to 35V to fit any project need.
- • **Compact & Ready-to-Use:** Mini 57x36x13mm size with LED display for instant voltage feedback.
- • **Precision Power Control:** High-Q inductors & solid capacitors filter noise for ultra-stable output.
- • **Built for DIY Innovators:** Easy potentiometer tuning with clear LED readout—no extra voltmeter needed.

## Overview

The Valefod 2 Pack LM2596 DC-DC Buck Converter offers a compact, high-efficiency voltage regulation solution with adjustable output from 1.5V to 35V and a max current of 3A. Featuring thickened circuit boards, advanced solid-state capacitors, and an LED display for real-time voltage monitoring, it’s designed for professional DIYers and electronics enthusiasts seeking reliable, noise-filtered power conversion with built-in safety protections.

## Description

Features: - DC-DC converter module - Thickened circuit boards - Advanced solid-state capacitor - Short circuit and over-temperature protection - 100% tested, sealed in anti-static packaging Kindly Note: 1. Input voltage must be 1.5 V higher than the output voltage, no boost 2. Do not reverse the input and output interface 3. Keep output under 2A (or 15W), and use a heat sink when for a long time working4. The factory settings stay a high voltage, you may need to contrarotate the screw on blue potentiometer about 7-15 circles before the output voltage changes How to Calibrate the Digital Tube Voltmeter (Optional steps for the person who need a highly accurate voltage value) 1. Short press the left "ON/OFF" button to start up the digital tube voltmeter. Long press(>1s, 4 seconds) the left button to enter self-calibration of voltage measurement(calibration range: -0.5-0.5V, factory setting is 0.0). "IN" indicator lights = input voltage measurement calibration starts. Then, long press(>2 seconds) the right "Mode" button, "OUT" indicator lights = output voltage measurement calibration starts. Tap the left / right button to reduce / rise by one unit (since the voltage value of one unit is less than 0.1V, you need to 1-5 times tap the button continuously, so that the voltmeter can change by 0.1V)3. After calibration, long press(>2 seconds) the right "Mode" button to preserve the adjusted value(no loss with outage) and back to normal voltage display. Specifications: - Model: LM2596/Digital Tube Voltmeter - Input voltage: DC 4V - 40V - Output Voltage: DC 1.5V - 35V (adjustable) - Output Current: 3A (max.) - Conversion Efficiency: 92% (max.) - Switching Frequency : 150KHz - Operating Temperature: -45℃ to +85℃ - Size(L x W x H): 57*36*13mm - Weight: 21g Package List: 2x DC-DC Buck Converter Module with LED Display

Review: Easy to use great for DIY projects. - Absolutely brilliant. You’ll need to turn anti clockwise to drop power, it takes a lot of turns, like 15-20 before you see anything happen. The led display works great just click the input/output buttons to switch the display, no voltmeter needed.
Review: good product - Good product, doing what should.

## Features

- 【High Precision】The buck converter consists of 36u thickened circuit boards, high-Q inductance with output LED indicator, and superior solid-state capacitors that can effectively filter out high frequency noise. Suitable for various electronic projects.
- 【Input Voltage】DC 4V to 40V (input voltage must be 1.5V higher than the output voltage, no boost).
- 【Output Voltage】DC 1.5V to 35V voltage is continuously adjustable, maximum output current is 3A.
- 【Mini Size】57*36*13 mm (with potentiometer). 2pcs included.
- 【Easy to DIY】Connect to power source, using a mini screwdriver to increase or decrease output voltage by adjusting the screw on the blue potentiometer and monitor voltage with multimeter to get the needed voltage, clockwise to increase voltage and counterclockwise to decrease voltage. (Factory default stays a high voltage, you need to contrarotate about 7-15 circles before the voltage starts ramping down, 1 circle means +/- 1V)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07VMLMLFN |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 12,705 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 40 in Industrial Power Supply |
| Colour | 2x LM2596 w/ LED |
| Customer Reviews | 4.5 4.5 out of 5 stars (128) |
| Date First Available | 20 Nov. 2019 |
| Item Package Quantity | 1 |
| Item Weight | 70 g |
| Item weight | 0.07 Kilograms |
| Manufacturer | Valefod |
| Manufacturer reference | VA-139-152 |
| Part number | VA-139-152 |
| Product Dimensions | 5.7 x 3.6 x 1.3 cm; 70 g |
| UPC | 793118393088 |

## Product Details

- **Brand:** Valefod
- **Current rating:** 3 Amps
- **Mounting type:** PCB Mount
- **Power source:** DC
- **Product dimensions:** 57D x 36W x 13H millimetres

## Images

![2 Pack LM2596 DC to DC Voltage Regulator 4-40V to 1.5-35V Buck Converter with LED Display - Image 1](https://m.media-amazon.com/images/I/71JxIVMbubL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy to use great for DIY projects.
*by P***T on 29 October 2025*

Absolutely brilliant. You’ll need to turn anti clockwise to drop power, it takes a lot of turns, like 15-20 before you see anything happen. The led display works great just click the input/output buttons to switch the display, no voltmeter needed.

### ⭐⭐⭐⭐⭐ good product
*by M***O on 8 October 2024*

Good product, doing what should.

### ⭐⭐⭐⭐ Works well, good price, terrible instructions
*by D***K on 18 December 2024*

Works well, good price, terrible instructions! I had to read the instructions over and over again but by a process of elimination figured it out. 1) Connect any DC power supply up to 40v into the left in+ connector. 2) You switch on the device by pressing the left little black button (on the input side IN+). It will then show you the input voltage on the digital display assuming the red light is showing on the left. 3) Then if you press the right button, it will show you the output voltage. If you press the right button again, you will see the input voltage again, and vice versa. 4) Go back to the output voltage, to adjust it. 5) Hold down the right (output OUT-) button until the display starts to flash. Then if you press the right button (while the display is still flashing) the output voltage will increase by one tenth of a volt each time you press the button. Or if you press the left button (while the display is still flashing) the voltage will go down by one tenth of a volt each time you press the button. 6) Then hold down the right button for a few seconds, and the display will stop flashing, and lock the output. 7) Then if you press the right button, it will show you the output voltage, then press it again to show the input voltage on the left. Each time you press it, it show the other voltage. The instructions picture indicates that turning the tiny brass screw will increase or decrease the output voltage. This does not seem to happen, it doesn't do anything, you adjust the output voltage as above.

## Frequently Bought Together

- Valefod 2 Pack LM2596 DC to DC Voltage Regulator 4-40V to 1.5-35V Buck Converter with LED Display
- [2 Pack] DC-DC 5A Buck Converter 4-38V to 1.25-36V Voltage Regulator High Power Module with LED Display

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-22*