Input voltage

Features: 1. In+: Input positive 2. Out+: Output positive 3. GND: IN-/OUT- 4. Dimensions:45 x 31 x 16mm(L x W x H) 5. Input voltage: 9 - 35V(Maximum limit voltage is 35V, please leave some leeway to use, otherwise it will be damaged) 6. Output voltage: 5V 7. Output current: 5A 8. Output power: 25W Package included: 1 x DC-DC 24V / 12V to 5V 5A 25W buck power module

Features: 1. In+: Input positive                            2. Out+: Output positive 3. GND: IN-/OUT-                                  4. Dimensions:45 x 31 x 16mm(L x W x H) 5. Input voltage: 9 - 35V(Maximum limit voltage is 35V, please leave some leeway to use, otherwise it will be damaged)   6. Output voltage: 5V                                   7. Output current: 5A 8. Output power: 25W Package included: 5 x DC-DC 24V / 12V to 5V 5A 25W buck power module  

Buy 5pcs DC-DC 24V / 12V To 5V 5A 25W Input Voltage 9 - 35V Buck Step Down Power Mo for R477.29

   LM2596 DC-DC Voltage Regulator Adjustable Power Supply Module With Display   Specification:   1. With the voltmeter shows voltage meter error ± 0.1V, the range 0-40V. (Note: To ensure the accuracy of the voltmeter, please ensure that the input voltage of 4V and above) 2. Touch the key to switch measuring input or output voltage, and has a light show which is being measured voltages 3. Power off memory function, show that road after power voltage values measured for the last time 4. Press the touch button for 3 seconds to turn off LED display, touch the button again to turn on the LED display 5. The band terminals, no iron can also be easy to use, and retention wire connection point 6. Input voltage 4.0-40V (input voltage to the output voltage must be higher than 1.5v.) 7. The adjustable output voltage range of 1.25V-37V continuously adjustable (input voltage must be higher than the output voltage to a high of about 1.5V) 8. The maximum output current up to 3A, normal and stable operating current of 2A 9. the internal oscillation frequency 150KHz, belonging to the second generation of switching voltage regulator, low power consumption, high efficiency 10. The current switching LEDs are red   Package Included:   1 x DC-DC step up/down voltage converter       ** LOCALLY STOCKED **          

Calibration method: The module with a calibration function, do not worry about the measurement display is not accurate, If you find that the display is not accurate you can use the following method of calibration. Just use the calibration once for the first time! Voltage calibration: In the case of power off, press and hold the "Setup" button, power on, enter the voltage calibration mode, the LCD screen starts flashing, release the set button, press the "Settings" button to increase, "OK" to decrease, the input voltage of the calibration for the correct. Such as: the input voltage is 12.65V, then the voltage will be adjusted to 12.65V, after 2 seconds will automatic preservation, power off and exit the calibration is complete! Special Note: If the first use of the output voltage can not be adjusted, because the module factory, the default output voltage is 20V or so. When you encounter this problem, please counterclockwise rotation ADJ-V potentiometer more than 10 laps, until the voltage value changes, and then you can use the normal regulation of the voltage. Feature: Input voltage: 7V-36V Output voltage: 1.5-35V continuously adjustable (can only be used to do buck module, the input must be greater than the output 1.5V or more) Output current: Adjustable, the maximum 10A (recommended used within 8A, the 5A or 70W below in normal temperature can be natural cooling, when exceed please strengthen the cooling! Recommend add a small fan! Constant current needs to output voltage above 2V can be adjusted, current regulation, only in the constant current state will work.) Output power: 150W maximum (recommended used within 100W, large pressure difference use please reduce power) Operating temperature: -20 to +75 degrees (Note the use of power tube temperature, when exceed please strengthen the cooling) Operating frequency: 300KHz Conversion efficiency: up to 95% Short-circuit protection: Yes, the constant current the current setting of constant current value. Input reverse protection: No, if necessary, please add a diode on your own! Output anti-reflux: No, for charging, if necessary, please add a diode on your own! Wiring: Terminals or soldering terminals, IN for the input, OUT for the output Module size: 80 x 53 x 35mm (L*W*H) Weight: 132g Setting description: Setting display mode, divided into three types: F-0 mode: Display the output voltage; F-1 mode: Display the input voltage; F-2 mode: Alternating display input and output voltage; Press the "SET" button to cycle show the three display modes. The corresponding LED will be on or off. Press "OK" button to save and exit. Press "OK" key to switch the LCD backlight. F-0 mode: Display the output voltage: F-1 mode: Display the input voltage: F-2 mode: Alternating display input and output voltage: Applications: 1. Used as an ordinary step-down module with overcurrent protection Instructions: 1) Under no load condition, adjust "ADJ-V" of constant voltage potentiometer to make the output voltage reach the voltage value you want; 2) Direct short-circuit module output (find a thick wire or tweezers shorted to the output, Note: short-time do not adjust the voltage), then adjust the "constant current potentiometer ADJ-I" to make current value reaches the preset over-current protection value; or connected to the load can also adjust the current. (Such as on-board ammeter shows the current value is 4A, then the module maximum current is limited to 4A, when the current to 4A, the constant current red indicator light) 3) Connected to the load, work. 2. Used as a battery charger Instructions: 1) Determine the battery float voltage and charge current; (If the lithium battery parameters is 3.7V / 2200mAh, then the float voltage is 4.2V, the maximum charge current 1A, or 2200mA) 2) Under no load conditions, adjust the "constant voltage potentiometer ADJ-V" so that the output voltage reach to float voltage; 3) Direct short-circuit module output (find a thick wire or tweezers shorted to the output, Note: when short-circuit do not adjust the voltage), then adjust the "constant current potentiometer ADJ-I" to make the current value to the preset value of the charging current; or connected to the load can also adjust the current. 4) Charging turn lights current factory default is 0.1 times charging current; (battery during charging the current is gradually reduced, and gradually from constant current charging to constant voltage charging, if the charge current is set to 1A, then when the charge current is less than 0.1A, the charging yellow indicator light is off, full of charge blue light is lit, then the battery charge is complete), when charging is completed, please disconnect the battery terminal, then disconnect the input to prevent the battery backflow damaged the module! 5) Connected to the battery, charging. 3. Uesd as a constant current LED driver module Instructions: 1) Determine that you need to drive the LED operating current and maximum operating voltage; 2) Under no-load conditions, the regulation "constant voltage potentiometer ADJ-V" so that the output voltage reach to LED operating voltage; 3) Direct short-circuit module output (find a thick wire or tweezers shorted to the output, Note: short-time do not adjust the voltage), then adjust the "constant current potentiometer ADJ-I" so that the current value reach to the preset LED operating current; or connected to the load can also adjust the current. 4) Connected to the LED, and test. Note: The constant current adjustable current, the actual load current must be greater than the set current to enter the constant current mode, otherwise is the constant voltage state of work, rather than the current transferred to 2A, that means connected to any device has changed to 2A. Package includes: 1 x 10A DC-DC LCD Adjustable Step Down Module

RUIDENG DPS5015 Communication Constant Voltage Current Step-down Digital Power Supply Module General Information:The constant voltage and constant current programmable control power supply module put the collection of analog integration and digital control functions in one. Its adjustable output voltage range is 0-50.00V, step by 0.01V. Its adjustable output current range is 0-15.00A, step by 0.01A. This module has power-down stored function and can store 10 groups preset value. And it also has the function of extracting quickly two groups stored value. Compared with the traditional analog power supply, it is more convenient to quickly extract the voltage or current required. LCD display on the module has the function digital voltmeter and ammeter. You can view the preset voltage, input voltage, output voltage, the preset current, output current, output power, etc. on the output state remind area, you can see that output opens or not, the state of constant voltage and constant current, output is normal or not, the key is locked or not, and the current data groups that is being used. On the setting data interface, you can adjust overvoltage value, overcurrent value, over-power value, data set and LCD brightness. This module has many advantages, small size, advanced function, good visual effect, high operability, high-precision, being used independently, being inset into the device and been widely applied.DPS5015 host computer information download address:httpss://www.mediafire.com/folder/3iogirsx1s0vp/DPS_communication_upper_computerTechnical parameters:Input voltage range: 6.00-60.00V Output voltage range: 0V-50.00VOutput current: 0-15.00A Output power range: 0-750W Product Weight: about 222g Display module size: 79*43*41(mm) (L*W*H)Open size: 71mm*39mm Power module size: 93*71*41(mm) (L*W*H) Length of connecting line: 200mm Fixed hole center distance: 86mm, 64mmOutput voltage resolution: 0.01V Output current resolution: 0.01A Output Voltage accuracy: ﾱ (0.5% 1 digit) Output Current accuracy: ﾱ (0.5% 2 digits)NOTE: 1.You must make sure that the input voltage is 1.1 times higher than output voltage. Under large current circumstances, pay attention to heat elimination.2. Connection between display part and power part should be according to the corresponding words. Otherwise it will not work by wrong connection Connection description:IN: Input positive IN-: Input negative:OUT: Output positive: OUT-: Output negativeNote: Input voltage range is DC 6-60V and 60v is the limit voltage; please leave a room to use. Or else it will be burnt. The input must be DC power supply, not AC 220V, or else it will be burnt too. Though this module has reverse connection protection and output short circuit protection, you can muse be in strict accordance with connection description to connect. If you connect the supply power with output, the module will be burnt.Panel description:1-Voltage setting/Page up to choose/Shortcut extract M1 data group2-Data setting/ Extract value of the specified data group/Store value into the specified data group3-Current setting/Page Down to choose/Shortcut extract M2 data group4-1.44 inch color LCD screen5-Coding potentiometer/Data adjustment/Lock all buttons6-Open or close outputDisplay interface description:7-The preset value of output voltage8- The actual value of output voltage9-The actual value of output current10-The actual value of output power11-The actual value of input voltage12-The preset value of output current13-Key lock or unlock prompt14-Output normal or not prompt15-Constant voltage and constant current status prompt 16-Data set prompt17-Open or close output prompt18-Preset output voltage19-Preset output current20-Preset over- voltage21-Preset over-current22-Preset over-power23-Preset screen brightness24-Preset data set25-The actual value of output voltage and output currentOperating instructions:When connect the power supply, the screen shows welcome window firstly and then comes into main interface. On the main interface, the output set voltage value and the output set current value is on the top of the screen. The big font value on the left are the current real output voltage, the current real output current and the current real output power. Input voltage is on the bottom of the screen. There are some running status icons on the right of the screen, key lock icon, abnormal output status icon, constant voltage and constant current icon, data set tip icon and opening or closing output icon.Set the output voltage and output current on the main interface. Press V/?key shortly, you can enter into voltage setting status. Then press the coding potentiometer, and then enter to adjust the numerical value. Press coding potentiometer to enter into the status of adjusting the numerical value you want to adjust. Turn coding potentiometer to adjust the numerical value. Turn by clockwise rotation to increase the numerical value; Turn by counterclockwise to decrease the numerical value. If you want to exit adjusting the numerical value, press shortly V/?. In the same time the preset value will be stored. Or you can do nothing in one minute, the status will be automatically existed and the preset will be stored too. You can press A/?to set the output current by the same way.Set the data on the data setting interface On the main interface, you can press SET key shortly to enter into data setting interface. On the data setting interface, press shortly V/?or A/? to page up or page down to U-SET or I-SET, and then set the output voltage and output current by same way used in the main interface.Set the protection value. Page up or page down to S-OVP, S-OCP or S-OPP place to set over-voltage value, over-current value and over-power value correspondingly; when the value is up to the setting value, output will be closed. And then press shortly the coding potentiometer to enter into the status of adjusting the numerical value you want to adjust. Turn coding potentiometer to adjust the numerical value. If you want to exit adjusting the numerical value, press shortly SET key.Adjust the brightness of screen. Page up or page down to B-LED, and then press shortly the coding potentiometer to enter into the status of adjusting the brightness of screen. Turn coding potentiometer to adjust the numerical value you need. If you want to exit adjusting the numerical value, press shortly SET key. There are six brightness levels of LCD screen, 0-5 level. Rank 0 is the darkest; rank 5 is the brightest. You can choose what you like. Data setting and store the specified data group. Page up or page down to M-PRE, and then press shortly the coding potentiometer to enter into the status of choosing the data groups. Turn coding potentiometer to choose the da

2Pcs 4V-40V DC-DC Step Down LM2596 Voltage Regulator Converter Module Description: Static power: 20 ma (and input voltage output voltage and digital tube color is closely related to the actual current will exist deviation) With voltage display function, the displayed accuracy is ± 0.05V, range is 0 - 40V. (Note: in order to voltage display more accurate, please ensure that the input voltage is higher than 4V) Button to switch measurement of the input or output voltage, and LED indicates the current measurement of the input or output voltage;The nixie tube can be turned off by another button.Mentioned in these states are able to be memorized, is not lost even if the power is disconnected. Continuously adjustable output voltage range of 1.25V -37V, 4-40V input voltage range. (The input voltage is at least high than the output voltage of 1.5V) High efficiency,150 kHz fixed frequency internal oscillator. Guaranteed 3A output load current. Thermal shutdown and current limit protection Specification: Parts Input voltage range: 4-40 v (40 v to limit the highest voltage) Output voltage range:1.25V - 37V (decompression mode, input output must be greater than 2 V above) Output current: 2 A continuous output Output power: the maximum 15 w Ripple frequency: 150 KHZ Grain wave peak: 100 mv IN +: input positive/IN -: input negative OUT +: output positive/OUT -: output negative Voltmeter precision: ± 5 ‰ Weight: 33g Size: 7cm x 4cm Package included: 2 X LM2596 voltage regulator converter module

General Information: The constant voltage and constant current programmable control power supply module put the collection of analog integration and digital control functions in one. Its adjustable output voltage range is 0-50.00V, step by 0.01V. Its adjustable output current range is 0-15.00A, step by 0.01A. This module has power-down stored function and can store 10 groups preset value. And it also has the function of extracting quickly two groups stored value. Compared with the traditional analog power supply, it is more convenient to quickly extract the voltage or current required. LCD display on the module has the function digital voltmeter and ammeter. You can view the preset voltage, input voltage, output voltage, the preset current, output current, output power, etc. on the output state remind area, you can see that output opens or not, the state of constant voltage and constant current, output is normal or not, the key is locked or not, and the current data groups that is being used. On the setting data interface, you can adjust overvoltage value, overcurrent value, over-power value, data set and LCD brightness. This module has many advantages, small size, advanced function, good visual effect, high operability, high-precision, being used independently, being inset into the device and been widely applied. DPS5015 host computer information download address: https://www.mediafire.com/folder/3iogirsx1s0vp/DPS_communication_upper_computer Technical parameters: Input voltage range: 6.00-60.00V Output voltage range: 0V-50.00V Output current: 0-15.00A Output power range: 0-750W Product Weight: about 222g Display module size: 79*43*41(mm) (L*W*H) Open size: 71mm*39mm Power module size: 93*71*41(mm) (L*W*H) Length of connecting line: 200mm Fixed hole center distance: 86mm, 64mm Output voltage resolution: 0.01V Output current resolution: 0.01A Output Voltage accuracy: ± (0.5% + 1 digit) Output Current accuracy: ± (0.5% + 2 digits) NOTE: 1.You must make sure that the input voltage is 1.1 times higher than output voltage. Under large current circumstances, pay attention to heat elimination. 2. Connection between display part and power part should be according to the corresponding words. Otherwise it will not work by wrong connection Connection description: IN+: Input positive IN-: Input negative: OUT+: Output positive: OUT-: Output negative Note: Input voltage range is DC 6-60V and 60v is the limit voltage; please leave a room to use. Or else it will be burnt. The input must be DC power supply, not AC 220V, or else it will be burnt too. Though this module has reverse connection protection and output short circuit protection, you can muse be in strict accordance with connection description to connect. If you connect the supply power with output, the module will be burnt. Panel description: 1-Voltage setting/Page up to choose/Shortcut extract M1 data group 2-Data setting/ Extract value of the specified data group/Store value into the specified data group 3-Current setting/Page Down to choose/Shortcut extract M2 data group 4-1.44 inch color LCD screen 5-Coding potentiometer/Data adjustment/Lock all buttons 6-Open or close output Display interface description: 7-The preset value of output voltage 8- The actual value of output voltage 9-The actual value of output current 10-The actual value of output power 11-The actual value of input voltage 12-The preset value of output current 13-Key lock or unlock prompt 14-Output normal or not prompt 15-Constant voltage and constant current status prompt

LED Driver Charging Constant Current Voltage Step Down Buck Module Feature: This module uses the LM2596 chip, high efficiency (up to 92%), low heat, can be very easily used to above 3A current, in conjunction with the original TI op amp control output current, so the overall output is very stable. This module uses the original Sanyo low ESR filter capacitor, you can make low ripple voltage to 50mV! This module uses machine placement, reflow soldering. This module is an adjustable buck module, the module can be adjusted from the blue adjustable resistor to change the output voltage. Input and output differential pressure is 2V, the minimum can be output 1.23V. Module indicated IN - (negative input), IN + (positive input), OUT - (negative output), OUT + (positive output), please note must be correct connected, otherwise may cause damage to the module. Description: Nature of the module: Non-isolated step-down module Rectification: Non-synchronous rectification Input voltage: 7V - 35V Output voltage: 1.25V - 30V Output current: Adjustable, 3A (maximum) Transfer efficiency: 92% (maximum) Switching frequency: 150KHz output ripple: 50mV (maximum) 20M Kbps Load regulation: ±0.5% Voltage regulation: ±2.5% Operating temperature: -40°C to +85°C Dimension: 48 x 23 x 14mm (L x W x H) Battery charging method: 1. Make sure the battery float voltage and charging current, the module input voltage; 2. Adjustment constant potentiometer, the output voltage is adjusted to about 5V. 3. Use the multimeter (10A current) measuring the output short-circuit current, meanwhile adjust the constant current potentiometer make the output current reaches a predetermined charge current value; 4. Turn lamp current default is 0.1 times charging current (constant current value), if you need to adjust please adjust the turn lamp current potentiometer; (generally doesn't need adjustment) 5. Adjustment constant potentiometer allows the output voltage reaches the float voltage; 6. Connected to the battery and try to charge. (1,2,3,4,5 steps are for the module input connected to the power supply, output-load battery is not connected.) LED constant current driver using method: 1. Make sure that the drive LED operating current and maximum working voltage; 2. Adjustment constant potentiometer, output voltage adjusted to about 5V. 3. Use the multimeter (10A current) measuring the output short-circuit current, meanwhile adjusting the constant current potentiometer allows the output current reaches a predetermined LED working current; 4. Adjustment constant potentiometer allows the output voltage reaches the maximum operating voltage LED; 5. Connect LED, test machine. (1,2,3,4 steps are module input connect to the power supply, output-load is not connected LED lights.) Package included: 1 x Buck module

General Information: The constant voltage and constant current programmable control power supply module put the collection of analog integration and digital control functions in one. Its adjustable output voltage range is 0-50.00V, step by 0.01V. Its adjustable output current range is 0-20.00A, step by 0.01A. This module has power-down stored function and can store 10 groups preset value. And it also has the function of extracting quickly two groups stored value. Compared with the traditional analog power supply, it is more convenient to quickly extract the voltage or current required. LCD display on the module has the function digital voltmeter and ammeter. You can view the preset voltage, input voltage, output voltage, the preset current, output current, output power, etc. on the output state remind area, you can see that output opens or not, the state of constant voltage and constant current, output is normal or not, the key is locked or not, and the current data groups that is being used. On the setting data interface, you can adjust overvoltage value, overcurrent value, over-power value, data set and LCD brightness. This module has many advantages, small size, advanced function, good visual effect, high operability, high-precision, being used independently, being inset into the device and been widely applied. Two version can select: Type A: DPS5020 No Communication Version Type B: DPS5020 Communication Version USB Board+Bluetooth Board Type C: DPS5020 Communication + USB version Very important: 1. Before buying this product, please download the upper computer software and test, if it fits your computer, you can buy 2. The upper computer only support For Win7 and above. 3. This is file for upper computer installation and software, you can download: https://www.mediafire.com/folder/3iogirsx1s0vp/DPS_communication_upper_computer Technical parameters: Input voltage range: 6.00-60.00V Output voltage range: 0V-50.00V Output current: 0-20.00A Output power range: 0-1000W Product Weight: about 222g Display module size: 79*43*41(mm) (L*W*H) Open size: 71mm*39mm Power module size: 93*71*41(mm) (L*W*H) Length of connecting line: 200mm Fixed hole center distance: 86mm, 64mm Output voltage resolution: 0.01V Output current resolution: 0.01A Output Voltage accuracy: ± (0.5% + 1 digit) Output Current accuracy: ± (0.5% + 2 digits) NOTE: 1.You must make sure that the input voltage is 1.1 times higher than output voltage. Under large current circumstances, pay attention to heat elimination. 2. Connection between display part and power part should be according to the corresponding words. Otherwise it will not work by wrong connection Connection description: IN+: Input positive IN-: Input negative: OUT+: Output positive: OUT-: Output negative Note: Input voltage range is DC 6-60V and 60v is the limit voltage; please leave a room to use. Or else it will be burnt. The input must be DC power supply, not AC 220V, or else it will be burnt too. Though this module has reverse connection protection and output short circuit protection, you can muse be in strict accordance with connection description to connect. If you connect the supply power with output, the module will be burnt. Panel description:

Specification:   1. With the voltmeter shows voltage meter error ± 0.1V, the range 0-40V. (Note: To ensure the accuracy of the voltmeter, please ensure that the input voltage of 4V and above) 2. Touch the key to switch measuring input or output voltage, and has a light show which is being measured voltages 3. Power off memory function, show that road after power voltage values measured for the last time 4. Press the touch button for 3 seconds to turn off LED display, touch the button again to turn on the LED display 5. The band terminals, no iron can also be easy to use, and retention wire connection point 6. Input voltage 4.0-40V (input voltage to the output voltage must be higher than 1.5v.) 7. The adjustable output voltage range of 1.25V-37V continuously adjustable (input voltage must be higher than the output voltage to a high of about 1.5V) 8. The maximum output current up to 3A, normal and stable operating current of 2A 9. the internal oscillation frequency 150KHz, belonging to the second generation of switching voltage regulator, low power consumption, high efficiency 10. The current switching LEDs are red   Package Included:   10 x DC-DC step down voltage converter  

Optional: Type 1: CNC power supply version Type 2: CNC power supply Modbus version Feature: Input voltage: 6V-32V Output voltage: 0-32V continuously adjustable (can only be used as step-down module, the input must be greater than the output 1V or more) Output current: Adjustable, the maximum 5A (if temperature over 60 degrees, please strengthen the cooling, there are reserved fan installation location and terminal blocks!) Output power: Up to 160W (recommended in the use of 120W, large pressure difference, please reduce the power) Operating temperature: -10 to +75 degrees (Note the use of power tube temperature, exceed the temperature please strengthen the cooling, there are reserved fan installation location and terminal) Resolution accuracy: Voltage 0.01V, Current 0.01A Conversion efficiency: up to 95% Short circuit protection: Yes, constant current the current setting of constant current value Input Anti-Reversed: Yes Output reverse flow: None, for charging please add a diode! Wiring method: Terminal VI + for the input positive, VO + for the output positive Module size: 79mm x 43mm x 46mm (L*W*H) Hole size: 76mm x 39mm (L*W) Weight: 75g Package includes: 1 x Adjustable CNC Step-down Power Supply Setting description: Output voltage setting: short press "CV" key, enter the voltage setting mode, turn the potentiometer to adjust the current voltage, press the potentiometer can switch to adjust voltage value, after adjust short press CV "key to save and exit. Output current setting: short press "CV" key, enter the current setting mode, turn the potentiometer to adjust the current value, press the potentiometer can switch to adjust voltage value, after adjust short press CV "key to save and exit. (note that when constant current, indicator will be turned to red, constant current adjustable current, the actual load output current must be greater than the set current to the constant current mode, otherwise is working as constant voltage state.) Display mode setting: short press "MODE" to switch the display mode, IN is the input voltage, OUT is the output voltage Switch output setting: directly short press the potentiometer key, can open or close the output voltage, turn off the current position display OFF words Modbus address setting (Type 2): short press "SET" key, enter the address setting mode -Id, the default is 1, turn the potentiometer to adjust the current address, range is 1-255, after adjustment and then press the "SET" key to save and exit, you can also set the address through the host computer software.

Specification: 1. With the voltmeter shows voltage meter error ± 0.1V, the range 0-40V. (Note: To ensure the accuracy of the voltmeter, please ensure that the input voltage of 4V and above) 2. Touch the key to switch measuring input or output voltage, and has a light show which is being measured voltages 3. Power off memory function, show that road after power voltage values measured for the last time 4. Press the touch button for 3 seconds to turn off LED display, touch the button again to turn on the LED display 5. The band terminals, no iron can also be easy to use, and retention wire connection point 6. Input voltage 4.0-40V (input voltage to the output voltage must be higher than 1.5v.) 7. The adjustable output voltage range of 1.25V-37V continuously adjustable (input voltage must be higher than the output voltage to a high of about 1.5V) 8. The maximum output current up to 3A, normal and stable operating current of 2A 9. the internal oscillation frequency 150KHz, belonging to the second generation of switching voltage regulator, low power consumption, high efficiency 10. The current switching LEDs are red Package Included: 10 x DC-DC step down voltage converter

Description: Input parameters: 3.7-7.4V/4A input, cable length: about 10 cm (red + green -) Output parameter: 800-1000KV / 0.5A, cabl length: about 16 cm High voltage polarization discharge distance:1.5-2cm (don't exceed) Size: 3.4 x 2.3 x 1.7cm About input power: can use 3.7V lithium battery input (such as 18650 battery), 4V or 6V lead acid battery and so on. The input voltage current affects the output high voltage and the arc distance. Usage method: red and green wire are input port; red wire is positive, green wire is negatice; other two high voltage wires are output port; input port connects with battery can generate high voltage arc. Please operate the module strictly according to the usage method and notice, otherwise it is easy to damage the module! This module is a high-voltage module / high-voltage generator made of components, it can be used as a high-voltage source for students' popular science experiment / electronic instrument / negative ion generator / scientific small production. The module is made of Tesla coil principle, and output high voltage pulse, small volume, high efficiency and strong discharge intensity. Package included: 1 x High voltage pulse generator

Specifications: Input: IN + input positive, IN- input negative Output way: OUT + output positive, OUT- output negative Input voltage: 4-38V Output voltage: 1.25-36V continuously adjustable Output current: adjustable, maximum 5A Output Power: 75W maximum Working temperature: -40 to + 85 ??br />Operating frequency: 180KHz Conversion efficiency: up to 96% Short circuit protection: Yes (limit current 8A) Overtemperature protection: (automatically shut off the output after overtemperature) Input reverse polarity protection: None, (if necessary, please enter the string into the high current diode) Installation: four 3mm screws Module dimensions: 51 x 26 x 15mm (L x W x H) Features: 1. High power, high efficiency, 5A, low ripple; 2. Triple: (1) Use as a normal blood pressure modules with overcurrent protection capability; (2) As the various voltage lithium batteries, batteries, nickel-cadmium nickel-metal hydride batteries (battery) charger for solar panels, wind turbines and other occasions; (3) Used as a high-power LED constant current drive module; 3. With constant pressure and constant current modes, there are light indicates which mode is currently in module; 4. When used as a lithium battery charger, you can set the float voltage and the charge current size, there is light indicates is being charged or has been filled; 5. Has the current limit protection, output short circuit even if it will not burn module. 6. This module uses machine placement, reflow soldering, and each module shipments have been two hours before the aging tests to ensure high reliability. Note: When you use this product, the module inputs and outputs to the ground and do not co-together, this will cause the board power current sense resistor is bypassed, so that the module can not adjust the output current size, the case then load easy to burn power chip module. Package included: 5 x 5A constant current constant voltage LED driver module

Module parameters: Scope: High-power LED constant current driver, rechargeable lithium batteries (including ferroelectric), 4V, 6V, 12V, 14V, 24V battery charging, nickel-cadmium nickel-metal hydride batteries (battery) charging, solar panels, wind generators Input voltage: 7-40V Output voltage: continuously adjustable (1.25-35V) (applied to the input voltage is higher than the output voltage applications can boost) Output Current: 8A, 10A maximum time within the (power tube temperature exceeds 65 degrees, please add cooling fan, 24V 12V 5A turn within generally be used at room temperature without a fan) Constant Range: 0.3-10A (adjustable) module over 65 degrees, please add fan. Turn lights Current: current value * (0.1), turn the lamp current and constant value linkage, such as constant value of 3A, turn the lamp current is set to a constant current of 0.1 times (0.1 x 3A = 0.3A), when the constant 2A, when adjusted to the current value, then turn the lamp current constant current of 0.1 times (0.1 x 2A = 0.2A). This version is a fixed 0.1 times (actually turn the lamp current value is probably not very accurate) is full of instructions for charging. Minimum pressure: 1V Conversion efficiency: up to about 95% (output voltage, the higher the efficiency) Operating frequency: 300KHZ Output Ripple: about the ripple 50mV (without noise) 20M bandwidth (for reference) Input 24V Output 12V 5A measured Operating temperature: Industrial grade (-40 ??to + 85 ?? (please note the actual use of the power tube temperature, the temperature is too high, please enhance heat dissipation) No-load current: Typical 20mA (24V switch 12V) Load regulation: ± 1% (constant) Voltage Regulation: ± 1% Constant accuracy and temperature: the actual test, the module temperature changes from 25 degrees to 60 degrees, the change is less than 5% of the current value (current value 5A) Dynamic response speed: 5% 200uS Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease) Indicator: color indicator, charging indicator light red, fully charged light green (no load is green) Output short circuit protection: Yes, constant current (constant current setting values) Input reverse polarity protection: None, Output anti-anti-perfusion: no, for charging the battery needs additional two diodes! Connection: Terminals Package included: 3 x DC-DC Step Down Adjustable Power Supply Module

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Features: Automatic identification for iPhone and other smartphone 5V constant voltage output Automatic restart (after the sun weaker, stop charging, automatic recovery after discharge to strong sunlight) Compatible with most smart phones, tablet, for iPad, digital cameras, etc. Specification: Input voltage:6V-20V Output voltage: 5V Maximum output current: 2000mA conversion efficiency:95% Product size: 35x40x15mm Package Includes: 30 x Solar Panel Module 30pcs 5V 2A Solar Panel Power Bank USB Charge Voltage Controller Regulator Module 6V 20V Input 30pcs 5V 2A Solar Panel Power Bank USB Charge Voltage Controller Regulator Module 6V 20V Input 30pcs 5V 2A Solar Panel Power Bank USB Charge Voltage Controller Regulator Module 6V 20V Input

Features:   110/220/440 VAC Programmable Input Rugged Compact Design With Under Frequency Protection Soft Start Voltage Ramping EMI Suppression Built-in Hihg Capacity 8Amp Fu   se   Parameters: SENSING INPUT Voltage: 110/220/400V ac max Frequency: 50-60 Hz nominal POWER INPUT Voltage: 100-260V ac max Frequency: 50-60 Hz nominal OUTPUT Voltage: max 90V dc at 240V ac input Current: continuous 3A,Intermittent 5A for 10 secs. Resistance: Min.15Ω Max.100Ω REGULATION: +/- 1% Packaged included: 1 x Automatic Voltage Regulator Module(GAVR-8A) 1 x User Manual

Securnix AC DC Voltage converter, input:20-36VAC, output:DC12V-1.5A, short circuit & overload protection-Twin Pack AC/DC Voltage Converter C24T12P Product Overview Securnix AC DC Voltage Converter, input: 20~36VAC; output: 12VDC 1.5A Please Note this Items is sold as pack of two Features: • Input voltage: 20~36VAC • Output voltage: 12VDC±2% • Output current:1.5A • Short circuit protection • Overload protection • Connection: Input—Terminal Block; Output—DC Plug 5.5*2.1mm • Sold as pack of two

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA 3Pcs 12V to 3.3V/5V/12V DC-DC Voltage Converter Multi-output Power Supply Module Feature: One channel input: DC 6V - 12V (the input voltage must be higher than the output voltage to 1V or more.) Triple output: 3.3V (± 0.05v error), 5V (± 0.05v error), 800mA (load current can not exceed 800ma), 12V (12V input directly to the output) Specially designed two rows of needle fixing hole, can be directly fixing on the plate to extend the experiment; Using multiple input and output pin, easy to use and connect; PCB board size: 4.5 x 4.5cm With power indicator (red) Package includes: 3 x Multi-output Power Supply Module 3Pcs 12V to 3.3V/5V/12V DC-DC Voltage Converter Multi-output Power Supply Module 3Pcs 12V to 3.3V/5V/12V DC-DC Voltage Converter Multi-output Power Supply Module

Securnix AC DC Voltage converter, input:16-28VAC, output:DC12V-1.5A-Single Pack Product Overview Securnix AC / DC Voltage Converter, input: 16~28VAC; output: 12VDC 1.5A- C24T1812 Please Note: This item is sold as a single unit Features: •Input voltage: 16~28VAC •Output voltage: 12VDC±2% •Output current:1.5A •Short circuit protection •Overload protection •Connection: Input—Terminal Block; Output—Terminal Block •Sold as Single Unit

Function Description: 1) 3A rectifier bridge (AC, DC input can be entered) 2) 2 * 35V 220UF high-voltage capacitor (do buffer filtering) 3) High-quality heat (supporting fins to enhance heat dissipation) 4) 1.5A high current chip This board uses full-wave bridge rectifier, AC or DC can be entered, and the input regardless of positive and negative electrodes. Filtering using two large-capacity electrolytic capacitor 35V 220UF do buffer filtering enables smooth and stable output current. L7812 is equipped with a heat sink, and 3A rectifier bridge, can meet high-current output. Application: DIY power supply, monitor power supply, test power, camera power supply, automotive power, communications equipment supply. Other parameters: Module size: 43*20*22mm Input voltage (pressure): DC15 ~ 24V, AC12 ~ 18V Output characteristics: Load Regulation: 100mV Quiescent Current: 8mA Output noise voltage: 42uV Input and output pressure: 2V Output Impedance: 15mΩ Peak Current: 1.5A Package included: 3 x L7812 LM7812 Three-terminal Voltage Regulator Module

Description: Using single chip embedded technology; Peak 4.5v to 10V level, jumper inserted at 5V. This level of signal mainly for conventional industrial control card (such as MACH3 board Card) 5V CPU interface; Easy to operate, can be fine-tuned by potentiometer; Select the PWM signal input level range through short cap; Module is small, easy to carry and use; Module operating voltage: DC12V-30V (power requirements: greater than 100mA); PWM signal reception frequency range: 1KHz-3KHz; Peak 12 to 24V level, jumper inserted in the 24V. This level of signal is mainly aimed at the conventional PLC interface; Conversion range: 0% -100% PWM to 0-10v voltage; Allowable error: 5%; Pin Definition: VCC: working power 12-30V GND: ground PWM: input PWM signal positive GND: input voltage ground VOUT: Output voltage: 0-10V GND: output ground Package included: 3 x PWM To Voltage Conversion Module 0-100% PWM To 0-10V Voltage

Description: Using single chip embedded technology; Peak 4.5v to 10V level, jumper inserted at 5V. This level of signal mainly for conventional industrial control card (such as MACH3 board Card) 5V CPU interface; Easy to operate, can be fine-tuned by potentiometer; Select the PWM signal input level range through short cap; Module is small, easy to carry and use; Module operating voltage: DC12V-30V (power requirements: greater than 100mA); PWM signal reception frequency range: 1KHz-3KHz; Peak 12 to 24V level, jumper inserted in the 24V. This level of signal is mainly aimed at the conventional PLC interface; Conversion range: 0% -100% PWM to 0-10v voltage; Allowable error: 5%; Pin Definition: VCC: working power 12-30V GND: ground PWM: input PWM signal positive GND: input voltage ground VOUT: Output voltage: 0-10V GND: output ground Package included: 1 x PWM To Voltage Conversion Module 0-100% PWM To 0-10V Voltage

Description: Physical volume: length 4.2X width 3.8X thickness 1 cm Input voltage: DC3.7V-6V Input current: 2-4A Input line length: about 12 cm High voltage type: pulse DC type Output voltage: about 400KV (please pay attention to safety when using) Output current: 0.5A-1A Output line length: about 11 cm High-voltage two-pole discharge distance: 1.5 cm - 2 cm About input power: You can use a single 3.7V lithium battery, such as 18650 battery, idle mobile phone battery (to remove the protection board, it is recommended to be more than 2000mAh) or nickel-cadmium/NiMH battery pack, 4V or 6V lead-acid battery, etc. (6V battery can achieve the best results) Package included: 1 x DC 3.7V-6V To 400KV Small Volume High Voltage Module

Description: • This instrument adopts imported LV321 current operation amplifying IC, which provides 140 times of amplification factor and adopts 5 milliohm current sampling resistor, so it is more accurate than 50 milliohms of the same industry. • The small energy can stably display 1mA current, the small current range within 1A, the measurement error is less than 0.5mA, and the 4A high current range is less than 1%. Features: ?ﾺPower-Off storage technology. When testing the capacity, such as an unexpected power failure, when the voltage drops to 2.2V, the internal storage circuit is triggered instantaneously, and the capacity stored in the battery is saved. ?ﾺThe leading 5 ohm current sampling resistor, with smaller line loss, means that the Dynamic current can be measured more accurately by a larger current. ?ﾺQuickly read valid data in a short period of time, IC Resolution 0.1mA ?ﾺWhen the input voltage is lower than 4.5V or higher than 5.7V, the light alarm device will be triggered. (Measured iPhon'e is higher than 5.8V to stop charging) Specification: The measurement voltage range:3.50-26.99V Max current:4.19A. Display:The current is greater than 1A and the display unit is Ampere (A), for example 1.00, which means 1.00A. The 3-digit red LED indicates the USB input voltage in volts (V), for example 5.20V. Intra-range error is less than 1% The 3-digit blue digital tube indicates the USB input current. Less than 1A, the unit is mA, such as display 2, indicating 2mA; display 15: indicating 15mA; The charging test supports the new Qualcomm 12V charger with a large display voltage of 26.99V. Large withstand voltage 32V The overall power consumption does not exceed (25V) 8mA, the normal working current is 6mA, and the small working current is 2mA (turn off the screen display light) Package includes: 1 x USB Voltage Current Tester Detail pictures:

DC-DC Voltage Converter Multi-output Power Supply Module 12V to 3.3V/5V/12V Feature: One channel input: DC 6V - 12V (the input voltage must be higher than the output voltage to 1V or more.) Triple output: 3.3V (± 0.05v error), 5V (± 0.05v error), 800mA (load current can not exceed 800ma), 12V (12V input directly to the output) Specially designed two rows of needle fixing hole, can be directly fixing on the plate to extend the experiment; Using multiple input and output pin, easy to use and connect; PCB board size: 4.5 x 4.5cm With power indicator (red) Package includes: 1 x Multi-output Power Supply Module

10Pcs DC-DC 12V to 3.3V/5V/12V Voltage Converter Power Supply Module Feature:One channel input: DC 6V - 12V (the input voltage must be higher than the output voltage to 1V or more.)Triple output: 3.3V (ﾱ 0.05v error), 5V (ﾱ 0.05v error), 800mA (load current can not exceed 800ma), 12V (12V input directly to the output)Specially designed two rows of needle fixing hole, can be directly fixing on the plate to extend the experiment;Using multiple input and output pin, easy to use and connect;PCB board size: 4.5 x 4.5cmWith power indicator (red)Package includes:10 x Multi-output Power Supply Module

20Pcs DC-DC 12V to 3.3V/5V/12V Voltage Converter Power Supply Module Board Feature:One channel input: DC 6V - 12V (the input voltage must be higher than the output voltage to 1V or more.)Triple output: 3.3V (ﾱ 0.05v error), 5V (ﾱ 0.05v error), 800mA (load current can not exceed 800ma), 12V (12V input directly to the output)Specially designed two rows of needle fixing hole, can be directly fixing on the plate to extend the experiment;Using multiple input and output pin, easy to use and connect;PCB board size: 4.5 x 4.5cmWith power indicator (red)Package includes:20 x Multi-output Power Supply Module