{"product_id":"seloky-lm2596-adjustable-dc-dc-buck-converter-module-pack-of-3-with-led-voltmeter-4-40v-input-1-25-37v-output","title":"Seloky LM2596 Adjustable DC-DC Buck Converter Module — Pack of 3 with LED Voltmeter, 4–40V Input, 1.25–37V Output","description":"\u003cp\u003e\u003cstrong\u003eSeloky LM2596 is a compact, adjustable DC-DC step-down (buck) converter module with an integrated LED voltmeter that converts 4.0–40V input down to a stable 1.25–37V output for electronics projects and power supply tasks.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis three-pack of Seloky LM2596 modules pairs a proven switching regulator with an onboard numeric voltmeter, a user-configurable output, and safety features like reverse-input diodes, thermal and short-circuit protection. The modules are built around the LM2596 second-generation regulator running at a 150kHz switching frequency and employ solid capacitors to improve stability and filter high-frequency noise. They include terminal blocks for quick wiring and a small potentiometer for adjusting output voltage without soldering.\u003c\/p\u003e\n\n\u003ch3\u003eHow accurate and visible is the built-in voltmeter?\u003c\/h3\u003e\n\u003cp\u003eThe LED voltmeter shows measured voltage with an approximate ±0.1V accuracy under normal conditions and displays values while input voltage is above 4.0V. You can toggle the meter off to save power and reduce distraction.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeasurement tolerance: ±0.1V\u003c\/li\u003e\n  \u003cli\u003eVisible while input ≥ 4.0V; no display below 4.0V\u003c\/li\u003e\n  \u003cli\u003eMeter can be switched off by holding the button 1–4 seconds\u003c\/li\u003e\n  \u003cli\u003eTap the button briefly to re-enable the display\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I set the output voltage and connect devices?\u003c\/h3\u003e\n\u003cp\u003eUse a small screwdriver to turn the onboard potentiometer until the voltmeter (when enabled) reads the desired output. The module provides screw terminal blocks for input, output, and ground, so many users can connect wires without soldering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOutput adjustable from 1.25V up to 37V\u003c\/li\u003e\n  \u003cli\u003eInput range 4.0V to 40V (monitor display requirement)\u003c\/li\u003e\n  \u003cli\u003eTerminal blocks for quick, solder-free wiring\u003c\/li\u003e\n  \u003cli\u003eFine adjustment via mini screwdriver on the trimmer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat protections and reliability features are included?\u003c\/h3\u003e\n\u003cp\u003eThe Seloky module incorporates input-side diodes to prevent damage from reverse connection and includes thermal and short-circuit protection. Solid electrolytic capacitors and a regulated switching design help maintain stable output under varying loads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReverse-input protection via diodes\u003c\/li\u003e\n  \u003cli\u003eOverheat and short-circuit protection built in\u003c\/li\u003e\n  \u003cli\u003eSolid capacitors for improved stability and noise filtering\u003c\/li\u003e\n  \u003cli\u003eRecommended heat dissipation for loads above ~15W\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich use cases is this module suited for?\u003c\/h3\u003e\n\u003cp\u003eThe LM2596 buck converter is versatile for automotive power, bench supplies, DIY electronics, hobbyist projects, and light industrial applications. Its adjustable range and protected design make it useful for prototyping and field repairs where a compact, efficient DC regulator is needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCar accessory power conversion and USB adapters (with extra circuitry)\u003c\/li\u003e\n  \u003cli\u003eBench power supplies for electronics development\u003c\/li\u003e\n  \u003cli\u003eDIY and maker projects requiring regulated DC voltages\u003c\/li\u003e\n  \u003cli\u003eRepair or retrofitting of small devices that need stable voltages\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Seloky LM2596 pack of three is aimed at hobbyists, technicians, and small-scale installers who want an affordable, adjustable DC-DC step-down module with a clear voltmeter and basic protections. It’s ideal when you need multiple modules for testing, parallel projects, or spare units—especially if you value quick wiring via terminal blocks and easy voltage trimming without soldering. For higher continuous power demands, plan for extra heatsinking or airflow to keep the regulator within safe temperature limits.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What input and output voltage ranges does the Seloky LM2596 support?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Input: 4.0–40V. Output adjustable from 1.25–37V; voltmeter only works when input is ≥4.0V.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to solder wires to use the module?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — the module includes terminal blocks for quick screw connections, though soldering is optional for permanent installs.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Seloky","offers":[{"title":"Default Title","offer_id":48455075922077,"sku":"B0DM9BQFY9","price":19.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/seloky-front-panel-led-voltmeter.jpg?v=1781717737","url":"https:\/\/nexoltic.com\/products\/seloky-lm2596-adjustable-dc-dc-buck-converter-module-pack-of-3-with-led-voltmeter-4-40v-input-1-25-37v-output","provider":"Nexoltic","version":"1.0","type":"link"}