LM2596 Adjustable Buck Converter DC-DC - Measure More Accurate Voltage. LM2596 DC-DC Buck Step-down Power Converter Module4.0-40V to 1.25-37V LED VoltmeterOutput voltage range of 1.25V ~ 37V Application: The LM2596 step-down converter can be used in fields where the input voltage is higher than the step-down output voltage, such as batteries, power transformers, etc. Buck modules can be used in many electronics projects. LM2596 Down Buck Power Convert With Reverse Voltage Protection,Short-Circuit and Over-Temperature Protection,Ensure safer use The buck converter consists of 36u thickened circuit boards, high-Q inductance with output LED indicator, and superior solid-state capacitors that can effectively filter out high frequency noise