LED Numeric Display: The buck converter features an LED voltmeter display with a measurement error of 0.1V. The input voltage range is 4.0V to 40V, and the output voltage range is 1.25V to 37V. Note that if the input voltage drops below 4V, the onboard voltmeter will cease operation and no display will be shown. To turn off the voltmeter, hold the switch for 1 to 4 seconds and release it. Once disabled, the voltmeter can be reactivated by briefly pressing the switchFeatures & Safety: The input side of the LM2596 buck converter is protected by two diodes, ensuring safe operation even in the event of reverse polarity connection. Additionally, the module includes overheat and short-circuit protection. For applications exceeding 15W, adequate heat dissipation measures should be implementedEase of Use: The LM2596 adjustable buck converter allows for easy adjustment of the output voltage using a mini screwdriver. Terminal blocks are provided for quick and solder-free connectionsLM2596 Adjustable Buck Converter: This second-generation voltage regulator operates at an internal oscillation frequency of 150KHz, offering low power consumption and high efficiency. It incorporates high-quality solid capacitors to enhance circuit stability and durability while effectively filtering out high-frequency noiseApplications: The LM2596 buck converter is highly versatile and performs effectively in a wide range of applications, including automotive power supplies, DIY projects, and industrial equipment. It is suitable for both professional users and beginners