SPECIFICATIONS

Product parameters:
In + input positive in - input negative!
Out + output positive out - output negative!
Note that the input and output cannot be reversed. The reverse connection may burn!

Input: DC 3V to 40V (the input voltage must be more than 1.5V higher than the voltage to be output. It cannot be boosted)
Output: DC 1.5V to 35V voltage is continuously adjustable, and the maximum output current of high efficiency is 3a.
Features: solid state capacitor, 36U thickened circuit board, high-Q high-power inductor with output LED indicator
Size: 44 (L) * 21 (W) * 14 (H) mm (including potentiometer)

matters needing attention:
For long-time operation, it is recommended to use the current within 2.5A and add heat sink (output above 10W);
As it is a step-down module, in order to ensure stable output, please keep the pressure difference of 1.5V.

Voltage regulation:
Connect the power supply (3-40v), adjust the blue potentiometer knob (generally rotate clockwise to boost voltage and counterclockwise to reduce voltage) and use a multimeter to monitor the output voltage until it reaches the required voltage

Wiring mode:
1. Welding, directly welding the power line to the input (output) port;
2. The welding pin can be inserted into the pin through the lead or inserted on the hole plate; Or directly soldered on the PCB after adding pins.

Application examples:
1. The on-board regulated power supply only needs to connect the input end of this module to the cigarette lighter of the car for power supply, and the potentiometer can be adjusted. The output voltage can be adjusted at 1.25-30v, which can supply power for many devices such as your mobile phone, MP3, MP4, PSP charging, etc. It is very simple and convenient.
2. Power supply for electronic equipment. When the equipment needs 3-35v power supply and the hand corresponds to the voltage power supply, this module can easily adjust the voltage to the required voltage and solve the problem.
3. System working voltage test, when doing the project, you can use this module to debug the working voltage range of various voltage test systems, which is very easy and convenient.

Product features:
Using SMD aluminum electrolytic capacitors, high-Q high-power inductors. After strict technical testing, an independent protective bag is used for packaging.
Specially designed 2 screw fixing holes. The four input and output pads are provided with row pin fixing holes, and the spacing is an integer multiple of 100mil, which is convenient for batch application in products;
be careful:
When the resistance value of the blue potentiometer is at the maximum, turn the knob counterclockwise after the input is connected. The output voltage will not change until about 7-8 turns

Lm2596s-adj adjustable step-down regulated power module direct plug capacitor
Basic parameters:
Module nature: non isolated Buck
Rectification mode: non synchronous rectification
Input voltage: 3.2v-40v
Output voltage: 1.25 ～ 35V
Output current: 3A (maximum)
Conversion efficiency: 92% (height limit)
Switching frequency: 150kHz
Output ripple: 30mV (maximum)
Load adjustment rate: ± 0.5%
Voltage regulation rate: ± 2.5%
Working temperature: - 40 ℃ ~ + 80 ℃
Size: 43 * 21 * 14mm (L * w * h)
Output voltage range: DC 1.25V ~ 35V voltage is continuously adjustable, high efficiency (95% maximum) and maximum output current is 3A

parameter
Input voltage: 2.5 ～ 35V
Output voltage: 1.25V ～ 35V
Output current: 3A
Conversion efficiency: 92%
Output ripple: < 30mV
Switching frequency: 150kHz
Working temperature: - 45 ℃ ~ + 85 ℃
Size: 66 * 36 * 14mm

Application scope
1. Calibration of input and output voltage measurement error: press the switch for more than 4 seconds, and then enter the voltage measurement error calibration function. At this time, the in light is on (calibration input end), and the digital tube flashes to display the calibration value (factory parameter is 0.0),
At this time, short press the key to change the value (the value range is - 0.5 ~ 0.5, and the unit is v). A positive number indicates upward calibration and a negative number indicates downward calibration. After adjusting the calibration value of the input terminal, press and hold the key for more than 2 seconds,
Enter the error calibration of the output end after releasing the hand. At this time, the out light is on (calibrate the output end), and the calibration value of the output end is displayed. The adjustment method is the same as that of the input end. After adjusting the calibration value of the output end, press and hold the key for more than 2 seconds. After releasing the hand, save the set value
Value and return to the normal display voltage. The set correction value will take effect immediately and will not be lost after power failure.
(with this function, you can meet your higher accuracy requirements)
2. Turn off the voltmeter: press and hold the switch for more than 1 second and less than 4 seconds to turn it off. After the voltmeter is closed, just press the switch briefly to open the voltmeter.

Lm2596 constant current and constant voltage power supply module
Basic parameters:
Module nature: non isolated step-down module
Rectification mode: non synchronous rectification
Input voltage: 7v-35v
Output voltage: 1.25 ～ 30V
Output current: adjustable to 3A
Conversion efficiency: 92% (height limit)
Switching frequency: 150kHz
Output ripple: 50mV (maximum) 20m bandwidth
Load adjustment rate: ± 0.5%
Voltage regulation rate: ± 2.5%
Working temperature: - 40 ℃ ~ + 80 ℃
Size: 48 * 23 * 14mm (L * w * h)

Lm2596 constant current and constant voltage power supply module
Basic parameters:
Module nature: non isolated step-down module
Rectification mode: non synchronous rectification
Input voltage: 7v-35v
Output voltage: 1.25 ～ 30V
Output current: adjustable to 3A
Conversion efficiency: 92% (height limit)
Switching frequency: 150kHz
Output ripple: 50mV (maximum) 20m bandwidth
Load adjustment rate: ± 0.5%
Voltage regulation rate: ± 2.5%
Working temperature: - 40 ℃ ~ + 80 ℃
Size: 48 * 23 * 14mm (L * w * h)

Some customers reported that the output voltage of the module
cannot be adjusted and is always equal to the input voltage.
When you encounter this problem,please rotate the potentiometer
counterclockwise for more than 10 turns,and then use the
module to adjust the voltage normally,Because when the
step-down module leaves the factory,the default output voltage
is about 20V.
The nixie tube can display normally only when the power supply
is above 6.5V.