Item Name: DC-DC Circuits LM2596 Buck Converter Step Down Power Supply Voltage Regulator. Output current 3A, recommended to use within 2.0A, high current need to strengthen heat dissipation.With voltmeter display and self-calibration. Adopted more advanced voltage microprocessor, voltmeter error 0.05V, range 0~40VWith overheat protection and short circuit protection, high conversion efficiency, 88% on averageWith terminals, no soldering iron can also be convenient to use, and retain the solder wire junctionVoltmeter can be turned off with a touch of the left button when not neededSpecification:Size 6.1*3.4*12cm (L*W*H)Weight:22gInput voltage:4.0~40VOutput power: 20W, more than 15W please strengthen the heat dissipation Application range. This module can be applied in the field of voltage reduction where the input voltage is higher than the output voltage, such as battery, power transformer, DIY adjustable voltage regulator, 24V car pen meter power supply, industrial equipment voltage reduction, 12V to 3.3V, 12V to 5V, 24V to 5V, 24V to 12V, 36V to 24V, etc. Package Included:1 x Buck Converter On-board voltmeter self-calibration method.1. When the on-board voltmeter shows output voltage, press and release the right button for 2 seconds, the voltmeter and output voltage indicator "OUT" will flash synchronously, and the output voltage adjustment mode will be entered at this time similarly, when the voltmeter shows input voltage, press and release the right button for 2 seconds, the voltmeter and input voltage indicator "IN" will flash synchronously. "IN" flashes synchronously, then enter the input voltage adjustment mode. 2. Touch the right button, the voltage increases by one unit, touch the left button, the voltage decreases by one unit as the voltage value of one unit is less than 0.1V, you need to press 1-5 times continuously to see the voltmeter change by 0.1V, the specific number of consecutive key presses depends on the current displayed voltage value, the higher the current displayed voltage, the fewer the number of presses. 3. After the voltage adjustment, long press the right button for 2 seconds and then release it, at this time you can exit the voltage calibration mode, all parameter settings are automatically saved by power off. *
