Tech & Electronics >>
HKM-194451 Adjustable LM2596 DC-DC Step-Down Voltage Regulator Module with On-Board Voltmeter and Protection Features
Introducing the HKM-194451 Adjustable LM2596 DC-DC Step-Down Voltage Regulator Module—an essential tool for anyone working with electronics and power management. This versatile module features an intelligent design that offers high cost performance, making it a smart choice for both hobbyists and professionals alike.
Equipped with an on-board voltmeter, this regulator provides real-time voltage readings that can be self-calibrated to ensure accuracy up to ± 0.05V within a range of 0 to 40V. To maximize usability, the module includes a convenient touch button to toggle between input and output voltage measurements, with an indicator light to clarify which voltage you’re currently monitoring. Moreover, all settings are retained even when the power is turned off, making it easy to resume where you left off.
The adjustable output voltage range is designed for flexibility, allowing for continuous adjustments from 1.25V to 37V, provided that the input voltage remains at least 1.5V higher than the output. With an input voltage range of 4.0V to 40V, this module can handle a significant variety of applications. While the output current can reach up to 3A, it's recommended to operate within 2A to ensure longevity and efficiency, especially under higher loads that require enhanced heat dissipation.
The HKM-194451 module doesn't compromise on safety. It comes with built-in reverse connection protection, as well as overheating and short circuit protection features, ensuring reliable operation in various conditions. The high conversion efficiency averages around 88%, adapting to different input and output configurations seamlessly.
Easy to install, the module features accessible wiring terminals, eliminating the need for a soldering iron. Its dimensions of 6.1*3.4*12cm make it compact and suitable for various projects without taking up excessive space.
Whether you're powering DIY projects or managing complex electronic setups, the HKM-194451 Adjustable LM2596 DC-DC Step-Down Voltage Regulator Module is a reliable choice that blends functionality with ease of use. Upgrade your electronics toolkit today and experience the benefits this module has to offer.
Product information:
Module highlights:
1. Comfortable price, intelligent and humanized design, with high cost performance!
2. On-board voltmeter, voltmeter can be self-calibrated, there will never be the problem of inaccurate voltmeter!
Module performance and features:
With voltmeter display and voltmeter self-calibration. More advanced voltage microprocessor is adopted, voltmeter error ± 0.05V, range 0~40V. (To ensure the accuracy of voltmeter, please ensure that the input voltage is above 4.5V)
Touch button to switch the measurement input or output voltage, and there is an indicator light showing which voltage is being measured, and save the setting, even if the power is off and then turn on.
The voltmeter can be closed and can be easily achieved by touching button on the left when it is not needed.
With wiring terminal, it is convenient to use without soldering iron, and bonding wire wiring points are retained.
Input voltage 4.0~40V. (The input voltage must be more than 1.5V higher than the output voltage)
The adjustable output voltage range is continuously adjustable from 1.25V to 37v. (The input voltage must be 1.5V higher than the output voltage)
The output current is 3A. It is recommended to use it within 2.0A. The large current needs to enhance heat dissipation.
Output power 20W, more than 15W please strengthen heat dissipation.
High conversion efficiency, with an average of 88% (efficiency is related to input, output voltage, current and differential pressure)
With reverse connection protection, reverse connection does not burn
With overheating protection and short circuit protection functions
Size 6.1*3.4 * 12cm (length * width * height)
Packing list:
Module*1
Product Image:
Every product we offer includes a 180-day purchase protection plan at no additional cost. This coverage extends beyond a standard warranty, reflecting our confidence in product quality and our ongoing commitment to your satisfaction.
The protection plan is designed to provide practical help in real-world situations. Whether you encounter a manufacturing issue, a performance problem, or an unexpected accident, our team is ready to assist with clear, fair solutions.
What Is Covered
Manufacturing Defects
We replace items with material or workmanship flaws at no charge.
Performance Failures
Free repair or replacement if the product fails under normal use.
Accidental Damage
One-time courtesy replacement at a reduced price.
Zero Hidden Fees
All shipping costs for replacements and returns are covered.
How to File a Claim
How This Differs from the Warranty
The 180-day purchase protection includes accidental damage and performance failures that are typically not covered by a standard warranty. It provides an additional layer of support during the first six months after purchase, giving you greater confidence and peace of mind.
We want you to be completely satisfied with your purchase. If for any reason you are not fully happy, you may return your item within 30 days of delivery for a full refund. No lengthy forms, no unnecessary questions.
Our return policy is built on a simple principle: if the product is not right for you, we will make it right. We understand that online shopping involves trust, and we work hard to earn that trust with every order.
Return Eligibility
30-Day Window
Request a return within 30 days of delivery.
Original Condition
Unworn or unused, with tags and original packaging.
Proof of Purchase
A receipt or order number is required.
Fast Refund
Refund processed within 10 business days.
How to Start a Return
Returns & Exchanges Overview
Damages & Exchanges
Please inspect your order as soon as it arrives. If the item is defective, damaged, or incorrect, contact us immediately so we can evaluate the issue and make it right. For exchanges, the fastest option is to return the original item and place a new order for the replacement.
We believe in the quality of our products, and we want you to share that confidence. Every product is backed by a 24-month warranty covering all structural and functional components, including zippers, buckles, straps, and fabric integrity.
The warranty is designed to be simple and accessible. You only need your proof of purchase to begin a claim, and our team will assess the issue promptly. If a manufacturing issue arises, we will make it right.
What the Warranty Covers
Comprehensive Coverage
Every part warranted for two full years.
Free Repair or Replacement
Whichever is faster, at no cost to you.
Quick Turnaround
Claims assessed within 1 business day.
Transferable
Warranty follows the product, not the owner.
How to File a Warranty Claim
Every order ships free—no minimums, no hidden fees. We currently deliver across the United States and are actively working to expand to more countries. We partner with reliable U.S. courier services to ensure your order arrives safely and on time.
Our delivery process is designed for transparency. From the moment you place your order to the moment it reaches your door, you receive clear updates at every stage. We carefully inspect each product before dispatch, and we provide tracking information as soon as your order ships.
Our U.S. Shipping Partners
USPS
Official national carrier with nationwide coverage.
UPS
Fast and reliable ground and express shipping.
FedEx
Express delivery with real-time tracking.
DHL eCommerce
Efficient parcel delivery for e-commerce shipments.
Delivery Process
Delivery Time Summary
Cancellations & Taxes
You may cancel your order at any time before it ships. All product prices include applicable taxes, and there are no additional VAT or customs fees for orders delivered within the United States.
Whether you have a question, need help with an order, or just want some advice, our support team is available around the clock. We don't just respond to messages—we work with you to find real solutions that fit your needs.
Our support specialists are trained to handle a wide range of requests, from product recommendations to technical troubleshooting. No matter the question, you can expect a professional and friendly response.
How We Can Help
Product Guidance
Our experts help you choose the right product.
Order Assistance
Modify orders, track shipments, or speed up delivery.
Warranty & Returns
Start claims or returns quickly and easily.
Technical Troubleshooting
Step-by-step solutions for product issues.
Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
Support Hours
Available 24 hours a day, 7 days a week
