- LED Numeric Display: The buck converter includes an LED voltmeter with a measurement error of ±0.1V. Input range is 4.0V to 40V and output range is 1.25V to 37V. If the input falls below 4V, the onboard voltmeter stops displaying. To turn off the voltmeter, hold the switch for 1 to 4 seconds and release. To reactivate, briefly press the switch. - LM2596 Adjustable Buck Converter: Second-generation voltage regulator with an internal oscillation frequency of 150 kHz, delivering low power consumption and high efficiency. Uses high-quality solid capacitors to improve circuit stability and durability while effectively filtering high-frequency noise. - Ease of Use: Output voltage is easily adjustable using a mini screwdriver. Terminal blocks are provided for quick and solder-free connections. - Features & Safety: The input side is protected by two diodes to ensure safe operation even with reverse polarity. The module includes overheat and short-circuit protection. For applications over 15W, ensure adequate heat dissipation. - Applications and scenarios: Use to power 5V or other voltages for microcontrollers, sensors, and small electronics from a 12V automotive battery or 24V solar source within the 4–40V input window. Power LED strips, small motors, or hobby devices by setting the output within 1.25–37V. Good for bench testing and prototyping where a compact, adjustable supply is needed.