DZS Elec LM2596 DC-DC Buck Converter 4-40V to 1.25-37V Step-Down Regulator Power Module Volt Stabilizer with LED Voltmeter Display Cooling Fin and Copper Cylinder Holder;

Feature:
Length: 6.1cm
Width: 3.4cm
Height: 1.2cm
Weight: 22g
Input: 4-40v
Output: 1.25-37v

Note:
The rated output power is 20w, please add cooling module if it is above 15w.
The rated output current is 3A, it is recommended to use within 2A, or please add cooling module.
Once calibrate the voltmeter, you can get the accurate voltage value on the whole voltage range.
The digital display is convenient for controlling of the input and output power, and cooling fin and copper cylinder holder make sure the usage of reverse voltage protection and short-circuit protection modules being more safe. The input and output terminal blocks can be used without electric soldering iron, in the meantime retaining the soldering point. Switch the digital tube light or dark, the input and output voltage power, and keep the final setting. Even if the digital tube is power on after outage, it will also keeps the state of the last switching.


The self-calibration method of buck converter voltmeter: 1. When the voltmeter shows output voltage, long press the right button for 2 seconds, then release, voltmeter and "OUT" LED flash in synchronization. Now the voltmeter enters into output voltage calibration mode. Similarly, when the voltmeter shows input voltage, long press the right button for 2 seconds, then release, voltmeter and "IN" LED flash in synchronization, now the voltmeter enters into input voltage calibration mode.
2. Touch the right button, the voltage rises a unit; Touch the left button, the voltage drops a unit. Due to a unit is less than 0.1 V, so you need to continuously press 5 times to see that the voltmeter changes 0.1 V.
3. After calibration, long press the right button for 2 seconds, then release. Now the voltmeter exits the voltage calibration mode. All the parameters will be saved automatically.