Lm2596 DC-DC regulated power supply module (red)Input voltage range: DC 3.2V ~ 40V (the input voltage must be more than 1.5V higher than the voltage to be output. It cannot be boosted)Output voltage range: DC 1.2V ~ 35V voltage is continuously adjustable, high efficiency (92% maximum) and maximum transmission current is 3a.Advantages: using SMD aluminum electrolytic capacitor, high Q value and high power inductance.In addition, each board is subject to technical tests on a case by case basis.Specially designed 2 screw fixing holes. The four input and output pads are all provided with row pin fixing holes.Note: it is recommended to use the current within 2.5A for long-time operation and add the heat sink (output above 10W). Since it is a step-down module, please keep the voltage difference of 1.5V to ensure stable output.Voltage regulation:Connect the power supply (3-4V) and adjust the blue potentiometer knob (generally rotate clockwise to boost voltage and counterclockwise to reduce voltage) and use a multimeter to detect the output voltage until it reaches the required voltage.

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 indicatorSize: 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 voltageWiring 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 capacitorBasic parameters:Module nature: non isolated BuckRectification mode: non synchronous rectificationInput voltage: 3.2v-40vOutput voltage: 1.25 ～ 35VOutput current: 3A (maximum)Conversion efficiency: 92% (height limit)Switching frequency: 150kHzOutput 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

parameterInput voltage: 2.5 ～ 35VOutput voltage: 1.25V ～ 35VOutput current: 3AConversion efficiency: 92%Output ripple: < 30mVSwitching frequency: 150kHzWorking temperature: - 45 ℃ ~ + 85 ℃Size: 66 * 36 * 14mmApplication scope1. 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 valueValue 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 moduleBasic parameters:Module nature: non isolated step-down moduleRectification mode: non synchronous rectificationInput voltage: 7v-35vOutput voltage: 1.25 ～ 30VOutput current: adjustable to 3AConversion efficiency: 92% (height limit)Switching frequency: 150kHzOutput ripple: 50mV (maximum) 20m bandwidthLoad 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 moduleBasic parameters:Module nature: non isolated step-down moduleRectification mode: non synchronous rectificationInput voltage: 7v-35vOutput voltage: 1.25 ～ 30VOutput current: adjustable to 3AConversion efficiency: 92% (height limit)Switching frequency: 150kHzOutput ripple: 50mV (maximum) 20m bandwidthLoad 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 potentiometercounterclockwise 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.