Product Description:

Use imported SMD aluminum electrolytic capacitors, high-Q and high-power inductors. In addition to eachThe boards have undergone rigorous technical testing, all of which have been tested and used independentEncapsulated in an antistatic protective bag. Specially designed 2 screw fixing holes. input OutputThe four pads are provided with pin header fixing holes, and the spacing is an integer multiple of 100mi,Convenient for batch application in products;

Note: The initial blue potentiometer and the resistance value of the factory must be input when the limit is large.Then press the counterclockwise knob, about 7-8 turns, the output voltage will change.

Product parameters:Input: DC 3V to 40V (the input voltage must be higher than the output voltage by 1.5V or more, no             Can boost)Output: DC 1.5V to 35V voltage is continuously adjustable, high efficiency and maximum output current is 3AFeatures: Use solid capacitors, 36u thick circuit board, high Q value and high power inductor, with output             LED indicatorSize: 45*22*11.5mm (length*width*height) including potentiometer

PrecautionsFor long-term work, it is recommended to use the current within 2.5A, and add a heat sink (output above 10W);Due to the time step-down module, in order to ensure stable output, please keep the limit as small as 1.5VDifferential pressure.

Wiring1. For welding, directly solder the power cord to the input (output) port;2. Soldering pins can be used by inserting pins through lead wires or inserting into holes on the board; or directly soldering the pins on the PCB.

Power debuggingConnect the power supply (3-40V), adjust the blue potentiometer knob (usually turn clockwise to boost, counterclockwise to buck) and use a multimeter to monitor the power output of the box until it reaches the required voltage.

Features:1. With voltmeter display, the error of the voltmeter is 0.1V, and the range is 440V.2. Large volume 5*5 touch the button to switch to input or output voltage, and there is an indicator light to show which terminal voltage is being measured. By default, the nixie tube displays the input voltage and the input indicator IN is on when it is turned on for the first time; when the button is touched, the nixie tube displays the output voltage and the output indicator OUT is on.And keep the settings, even if the power is turned off and on again3. The voltmeter can be turned off. Press and hold the switch for more than 1 second and less than 4 seconds, and you can turn it off when you let go. After the voltmeter is closed, simply press the switch to turn on the voltmeter.4. Input and output voltage measurement error calibration function. Press and hold the switch for more than 4 seconds. After letting go, it will enter the voltage measurement error calibration function. At this time, the IN light is on (calibration input terminal) and the digital tube flashes to display the correction value (the factory parameter is 0.0). Short press the button to change this value (the value range is 0.50.5, and the unit is V). A positive number means upward calibration, and a negative number means downward correction. After adjusting the calibration value of the input terminal, press and hold the button for more than 2 seconds, and then let it go to the error calibration of the output terminal. At this time, the OUT light is on (calibration output terminal), and the calibration value of the output terminal is displayed. The adjustment method is the same as that of the input terminal. After adjusting the calibration value of the output terminal, press and hold the button for more than 2 seconds, and then release the lock setting value and return to the normal display. Voltage, the set calibration value will take effect immediately and will not be lost when power off, (with this function, you can meet your higher precision requirements)5. With terminal blocks, it is easy to use without a soldering iron, and the connection point of the welding wire is reserved (the input voltage must be higher than the output voltage by more than 1V)6. The output current can be as high as 3A. It is recommended that the working voltage be around 2A, and a heat sink should be added for more than 2A.7. The internal vibration frequency of 150KHz is adopted, which belongs to the second-generation switching voltage regulator, which has low power consumption and high efficiency.

Features:Input voltage: 2. 5~35VOutput ripple: 30mVOutput voltage: 1.25V-35VSwitching frequency: 150KHzOutput current: 3AWorking temperature: -45C+85'CConversion efficiency: 92%Size: 66*36*14mm

Applications:This module can be used in step-down fields where the input voltage is higher than the output voltage, such as batteries, power transformers, DIY adjustable regulated power supplies, 24V car laptop power supplies, industrial equipment step-down, 12V to 3.3V, 12V to 5V, 24V to 5V, 24V to 12V, 35V to 24V, etc.

Self-calibration method of on-board voltmeter:1. The input and output voltage measurement error is more accurate: long press the switch for more than 4 seconds, loosenAfter hand, it enters the voltage measurement error calibration function, and the IN light is on (calibration inputEnd), the digital tube flashes to display the positive value (the factory parameter is 0.0), at this time shortPress the button to change this value (the value range is 0・5~0.5. The unit is V), A positive number means upward calibration, and a negative number means downward calibration. Adjust the inputAfter the calibration value is reached, press and hold the button for more than 2 seconds, and then let go of theDifference calibration. At this time, the OUT light is on (calibration output terminal), and the calibration of the output terminal is displayed.The adjustment method is the same as that of the input terminal. Adjust the standard value of the output terminal.After that, press and hold the button for more than 2 seconds, let go, save the set value and return to normalThe voltage is always displayed, and the set correction value will take effect immediately and will not be lost after power failure. (With this function, you can meet your higher precision requirements)2. Turn off the voltmeter: long press the switch for more than 1 second and less than 4 seconds, releaseThe hand can be closed. After the voltmeter is turned off, simply press the switch to turn on the electricity.Pressure gauge.

Parameter:Input voltage: 5V-40V (The input voltage is higher than the output voltage)Output voltage: 3.3V/5V/12VConversion efficiency: 96% (Max)Switching frequency: 150KHzWorking temperature: -40℃~+85℃Load capacity: about 10W working for a long timeOutput current: 3A(Max)