DC-DC Buck Converter Modules LM2596S Adjustable Voltage Regulator, 2 Pcs

Features:How to use: 1. Press the button in a short time (1 second) so that IN led lighted, the voltmeter shows the value of input voltage.2. Press the button in a short time (1 second) again so that OUT led lighted, the voltmeter shows the value of output voltage.3. Rotate the top screw of potentiometer clockwise to boost the value of the output voltage, anti-clockwise to reduce it.4. Long press the button between 1 and 4 seconds to turn off the voltmeter.How to adjust accuracy of input/output voltage:(for the person who need a highly accurate value of number)1. Long press the button for more than 4 seconds, then release, voltmeter and IN led flash in synchronization entering into the input voltage calibration mode.2. Press the button in a short time (1 second) to adjust the value (range from -0.5 - 0.5V), positive means to rises units, negative means to minus element. (Due to a element is less than 0.1V, so you have to continuously press 1 to 5 times to see the voltmeter change 0.1V).3. Long press the button for more than 2 seconds and then release to enter the output voltage calibration mode. 4. After calibration, long press the button for more than 2 seconds all parameters will be saved automatically and back to the voltage display.Specification:Function: Built in over-temperature protection functionBuilt in current limit functionBuilt in output short-circuit protection functionSize: approx. 6.6 x 3.9 x 1.8 cm/ 2.6 x 1.5 x 0.7 inchesPackage include:2 x LM2596s buck converterNote:Please keep away from little kids.

• LED Precise Parameters Display: input voltage 4V-40V, output voltage 1.25V-37V, max output current 3A (recommended 2A for stable use), conversion efficiency up to 92%, output ripple under 30mV, switching frequency 150KHz, operating temperature -45°C to +85°C, the buck converter features an LED voltmeter display with a measurement error of ±0.1V
• Triple Safety Protection: built-in overheat, short-circuit, and current-limit protection keep your circuit safety; Two diodes on the input side provide reverse polarity protection no damage if connected backwards; Solid capacitors improve circuit stability and filter out high-frequency noise effectively
• Lm2596s Simple to Operate: adjust output voltage with a mini screwdriver in seconds; Press briefly to switch the LED display between input and output voltage readings; Hold 1-4 seconds to turn the voltmeter off and save power; Terminal blocks allow tool-free wiring no soldering required
• Adjustable Buck Converter: it's a second-generation voltage regulator with low power consumption and high efficiency; Features 150KHz internal oscillation frequency with up to 92% conversion efficiency significantly less heat than linear regulators; Built with solid capacitors for long-term stability; For continuous loads over 15W or 2A, adding a heatsink is recommended
• Wide Applications: package includes 2 x LM2596S adjustable DC-DC buck converter modules; Ideal for car power supplies, DIY adjustable power supply,3D printers, industrial equipment, and LED lighting; Supports common conversions: 36V/24V/12V to 5V, 24V to 12V, and more; Suitable for both beginners and experienced engineers