LM2596 Step Down DC / DC voltage regulator with display from 4-40V to 1.25-30V Features With voltmeter display Advanced microprocessor, voltmeter error ± 0.05V, range 0 ~ 40V. Note: To ensure the accuracy of the voltmeter, please make sure the input voltage is above 4V Tap the button to toggle between input and output voltage measurement, and there is a light to show which voltage is being measured and the setting is saved, even if the power is turned off and on again The voltmeter can be turned off by tapping the left button With terminal blocks, it is easy to use without a soldering iron, and the connection points of the solder wires are reserved Input voltage 4.0 ~ 40V (The input voltage should be 1.5V higher than the output voltage.) Adjustable output voltage range 1.25V ～ 37V continuously adjustable (the input voltage should be 1.5V higher than the output voltage) The maximum output current can be up to 3A, and the normal stable working current is 2A Uses 150KHz internal oscillation frequency, belongs to the second generation switching voltage regulator with low power consumption and high efficiency With overheat protection and short circuit protection function