Adjustable module

5Pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator Features: 1. As a square wave signal generator,generates a square wave signal used for experimental development. 2. Used to drive a stepper motor for generating a square wave drive signal. 3. Generate adjustable pulse for MCU. 4. Generate adjustable pulse,to control circuitry associated. 5. Size: 31mm x 22mm 6. Main chip: NE555 7. Input Voltage: 5V-15V DC. When power supply is 5V, the output current can be 15 MA around; when 12V power supply, the output current can 35 MA around 8. Input current: >=100 MA 9. Output amplitude: 4.2V V-PP to 11.4V V-PP. (Different input voltage, the output amplitude will be different) 10. Maximum output current: >=15MA (5V power supply, V-PP greater than 50%), >=35MA (12V power supply, V-PP greater than 50%) 11. Output with LED indication(low level,LED will on; high level,LED will off;low frequency, the LED flashes) 12. The output frequency range is selectable: LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz High-frequency file: 1KHz ~ 10kHz HF file: 10kHz ~ 200kHz 13.The output duty cycle can fine-tune; duty cycle and frequency is not separately adjustable; adjusting the duty cycle will change the frequency Package included: 5 x NE555 Pulse Frequency Duty Cycle Adjustable Module

3Pcs DC-DC Step Down Power Supply Adjustable Module With LCD Display With Housing Case Specifications: Converter type: DC-DC Input voltage: 5~23V (Best voltage 20V) Output voltage: 0V~16.5V (Continuously adjustable) Peak current: 3A Mainboard size: 50mm x 30mm x 12mm(LxWxH) Display module: STN LCD LCD size: 37.5mm x 17.0mm(LxW) LCD accuracy: 1% Conversion efficiency: 95% Load regulation S(I): Voltage regulation S(U): Package included: 3 x DC-DC step-down power suppl module 3 x Transparent shell

5Pcs DC-DC Step Down Power Supply Adjustable Module With LCD Display With Housing Case Specifications: Converter type: DC-DC Input voltage: 5~23V (Best voltage 20V) Output voltage: 0V~16.5V (Continuously adjustable) Peak current: 3A Mainboard size: 50mm x 30mm x 12mm(LxWxH) Display module: STN LCD LCD size: 37.5mm x 17.0mm(LxW) LCD accuracy: 1% Conversion efficiency: 95% Load regulation S(I): Voltage regulation S(U): Package included: 5 x DC-DC step-down power suppl module 5 x Transparent shell

Features: 1. As a square wave signal generator,generates a square wave signal used for experimental development. 2. Used to drive a stepper motor for generating a square wave drive signal. 3. Generate adjustable pulse for MCU. 4. Generate adjustable pulse,to control circuitry associated. 5. Size: 31mm x 22mm 6. Main chip: NE555 7. Input Voltage: 5V-15V DC. when power supply is 5 V, the output current can be 15 MA around; when 12V power supply, the output current can 35 MA around 8. Input current: >=100 MA 9. Output amplitude: 4.2V V-PP to 11.4V V-PP. (Different input voltage, the output amplitude will be different) 10. Maximum output current: >=15MA (5V power supply, V-PP greater than 50%), >=35MA (12V power supply, V-PP greater than 50%) 11. Output with LED indication(low level,LED will on; high level,LED will off;low frequency, the LED flashes) 12. The output frequency range is selectable: LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz High-frequency file: 1KHz ~ 10kHz HF file: 10kHz ~ 200kHz 13.The output duty cycle can fine-tune;duty cycle and frequency is not separately adjustable;adjusting the duty cycle will change the frequency Package included: 1 x NE555 Pulse Frequency Duty Cycle Adjustable Module

20Pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator Features: 1. As a square wave signal generator,generates a square wave signal used for experimental development. 2. Used to drive a stepper motor for generating a square wave drive signal. 3. Generate adjustable pulse for MCU. 4. Generate adjustable pulse,to control circuitry associated. 5. Size: 31mm x 22mm 6. Main chip: NE555 7. Input Voltage: 5V-15V DC. When power supply is 5 V, the output current can be 15 MA around; when 12V power supply, the output current can 35 MA around 8. Input current: >=100 MA 9. Output amplitude: 4.2V V-PP to 11.4V V-PP. (Different input voltage, the output amplitude will be different) 10. Maximum output current: >=15MA (5V power supply, V-PP greater than 50%), >=35MA (12V power supply, V-PP greater than 50%) 11. Output with LED indication(low level,LED will on; high level,LED will off;low frequency, the LED flashes) 12. The output frequency range is selectable: LF file: 1Hz ~ 50Hz                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        &nbs

Buy 20Pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator for R525.00

Buy 3pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Rectangular Wave Signal Generator for R124.26

Buy Winners DC-DC Step Down Power Supply Adjustable Module With LCD Display With Housing Case for R182.85

Buy 5pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Rectangular Wave Signal Generator... for R209.00

Buy 3Pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator for R175.00

Buy 10pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator Stepper Motor for R325.00

Adjustable Flexible Follow Focus FF Gear Ring Belt For DSLR Camera DV Description: This Gear Ring Belt is universal and used for follow focus. It is lightweight, flexible and adjustable. You can adjust the camera lens freely through this gear ring. It is made of durable material. Non-slip design, and smooth design is no harm to your camera. Adjustable and flexible. Easy to use. Special used for follow focus. Suitable for any lens with diameter from approx. 52mm to 86mm(2.0-3.4in). Specifications: Material: Rubber Color: Black Gear module: Film industry standard 0.8 thread Total length: Approx. 37cm / 14.6" Weight: 29g / 1.0oz Package included: 1 x Adjustable gear ring belt

Adjustable Lens Gear Follow Focus Ring Belt For DSLR Camera Product introduction: The focus ring is mainly used for the auxiliary focusing of the camera.. This product uses the precise focusing design, with the quick and easy installation way, the great place then the photographer quick and accurate focus. Make film shooting more perfect, efficient. Each adjustment through the screw to increase 10mm. The follow focus ring belt can fit all zooming lenses with size from 52mm to 86mm. Function feature: convenient accurate focus; perfect design, feel good; applies to all SLR cameras; high-grade aluminium alloy handle, durable, easy adjustment; screws: stainless steel material; film industry standard. easy to install, can cooperate with the focal device, when used alone, due to the increase of the outer diameter of the lens; strong structure, wide width, good control performance; Item Specifications: Suitable lens size: 49mm, 52mm, 55mm, 58mm, 62mm,67mm, 72mm, 77mm, 82mm Material: High quality Aluminium alloy, ABS Item colour: Black Whole length: 36cm Gear module: Global engineering standard 0.8 Package Contents: 1 x Adjustable Gear Ring Belt 1 x Aluminium Alloy Grip I ONLY POST TO ADDRESSES IN SOUTH AFRICA - NO INTERNATIONAL SALES

Adjustable Regulator Pulse Width PWM DC Motor Speed Controller Switch Feature: High efficiency, high torque, low heat generating. With reverse polarity protection, high current protection. Convenience and easily use. Specification: Material: PCB and electronic components Input voltage: DC6V - 28V Sustained current: 3A PWM euty cycle: 5% - 100% PWM frequency: 21KHz Module dimension: 50 x 29 x 16 mm / 1.97 x 1.14 x 0.63 inch (LHW) (approx) Cable length: Approx 200 mm / 7.88 inch Package included: 1 x PWM motor speed controller switch

Buy Adjustable DC5V12V Voltage Regulator Module Constant Voltage Current For Solar Charging for R256.29

Buy Adjustable Step Down Buck Voltage Charger Module 10A **LOCAL STOCK** for R105.00

Description: The follow focus ring belt can match the Follow focus in a great way. And the ring belt can fit all zooming lens with size from 52mm to 86mm. Features: High quality Aluminum alloy grip,durable; Built-in Stainless steel screw, in accord with the global standard size; Simple for work and convenient for installation; Design with large external diameter, and fit most cameras and camcorders; Suitable for most shooting situations Specifications: Suitable lens size: 49mm, 52mm, 55mm, 58mm, 62mm,67mm, 72mm, 77mm, 82mm Material: High quality Aluminum alloy Item color: Black Whole length: 36cm Gear module: Global engineering standard 0.8 Package Included: 1 x Follow Focus Ring Belt Detail Pictures:

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

Mini DC Adjustable Power Supply Buck Module Step Down Module Description: Module Properties: Non-isolated step-down module (BUCK) Rectification: Synchronous rectification Input voltage: DC 4.75V-23V Output voltage: DC 1.0V-17V (Adjustable, Output Output current: Rated current 1.8A (3A MAX, can not be prolonged) Output ripple: 30mV (no-load) Dimension: 17 x 11 x 4mm(L x W x H) / 0.67'' x 0.43'' x 0.16'' approx Weight: 1g (per.) Package included: 1 x Mini DC-DC step-down adjustable module

Buy Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module With LCD Display for R223.27

Module parameters: Input voltage: 6V-32V Output voltage: 1.5-32V continuously adjustable (can only be used step-down module, the input must be greater than the output 1.5V or more) Output current: adjustable, the maximum 5A (recommended in the use of 4.5A, when exceed 3A or 35W the best to strengthen the cooling! Suggest using a small fan at the input terminal! Constant current requires an output voltage of 2V or more to be adjusted, the current regulation, only in the constant current state will work, constant current is mainly directly used to the low resistance battery charge or LED working current limit and other use, please make sure about this before you order it. Output power: up to 75W (recommended in the use of 50W, if uses large pressure difference, please reduce the power) Operating temperature: -20 to +70 degrees (pay attention to the power tube temperature, when exceed please strengthen the cooling) Operating frequency: 180KHz Conversion efficiency: up to 96% Short circuit protection: Yes, constant current Current set constant current value Over-temperature protection: Yes (over-temperature automatically turn off the output) Input reverse protection: Yes Output reverse flow: None, for charging please add a diode! Installation: 8pcs pillars, 8pcs 3mm screws Wiring method: wiring terminal or soldering terminal, VIN for the input, VOUT for the output Module size: 65.6mm x 40mm x 25mm (L*W*H) Weight: 77g Calibration method: The module has a calibration function, don't worry about measuring inaccurate problems, if you find the measurment is not inaccurate you can use the following methods calibration. Just need to calibration once for the first time! Voltage calibration: In the case of power down, press and hold the "SET" button, power on, enter the voltage calibration mode, the LCD screen starts to flash, release the set button, press the "Set" key to add, "OK" to reduce, calibrate correct input voltage, such as: the input voltage is 12.65V, then adjust the current voltage to 12.65V, after 2 seconds it automatic save, power off and exit to complete the calibration! Current calibration: For no-load current display, or current is too large! In the case of power off, press and hold the "OK" button, power on, enter the current calibration mode, the LCD screen starts to flash, release the "OK" button, press the "Set" button to add, "OK" button to reduce, calibrate correct current, such as: no load display 0.02A, then adjust to 0.00A, after 2 seconds it automatic save, power off and exit to complete the calibration! Special Note: Some customers feedback that the output voltage can not be adjusted, this is due to the factory default voltage is 20V. When you encounter this problem, please counterclockwise rotation ADJ-V potentiometer 10 laps above, until the voltage value changes, and then the module can be normal adjustment of the voltage. Note: USB output voltage and the module output voltage needs to be consistent, when the USB indicator does not light, means USB has no output, when the USB light is set, it is not fixed 5V output, when charging USB device please make sure the voltage is 5V, if higher than 5.5V screen will flash, it will be reminded to adjust the voltage, otherwise it may damage your device, USB output power is turned off by default, to ensure that mistakenly plug USB will not damage the device. Setting Description: Setting key can be set to four kinds of display mode: 1. F-0 mode: display output voltage; 2. F-1 mode: display input voltage; 3. F-2 mode: alternately display input and output voltage; 4. USB mode: display USB output voltage and turn on or off the USB output; Instructions: press the "set" button, the cycle shows four kinds of display mode, the corresponding indicator light will on/off, press the "OK" key to save and exit, press the "OK" button to switch the LCD backlight. Package includes: 1 x 5A DC-DC Adjustable Step Down Power Supply Module (Board color will send in random)

Specifications: · 300W 8A 7-32V to 0.8-28V DC CC CV Buck Step-Down Converter Power Supply Step Down Module Adjustable Voltage Regulator LED Driver · High-power, constant current LED driver · Battery charger · Vehicle-mounted power supply · Low voltage system power supply · Non-isolated step-down CC CV Buck module with on-board LED load indicator · Input voltage: DC 7-32 V · Output Voltage: DC 0.8-28 V (Adjustable) · Output Current: 8A (MAX), more than 60Deg please strengthen heatsink · Continuous Current Range: 0.2-8A Adjustable · Output Power: 300W (MAX) · Conversion efficiency: 95% (more input voltage, more efficiency) · Output ripple: 50mV · Working Temperature: industrial (- 40 ° c to +85 °c) (environmental temperature, more than 40 degrees, please reduce power to use, or - enhance cooling) · No-load current: 20mA (input 24V,Output 12V for reference) · Voltage regulation: ± 1% · Load regulation: ± 1% · Dynamic response speed: 200uS 5% · Short circuit protection: YES · Input Reverse protection: No (please comply with a reverse protection or connect a diode at input parts.) · Size: 65 x 47 x 22 mm · On-board LED load indications: red = load present (eg. 'battery charging'), green = no load (eg. 'battery charged' or output disconnected) Features: 1. Fixed turn lamp current is 0.1 times the current value(Used to identify whether the battery is fully charged When charging). 2. Made from a dedicated benchmark IC and high-precision current sensing resistor, proving a more stable constant current, (when 20°C to 100°C constant current 1A, temperature drift less than 1%). Particularly suitable for LED driver. 3. High output current, the max output current can reach 8A. 4. Four high frequency capacitance, can lower output ripple, enhance the work stabilization. 5. Double heat sink design. MOS schottky diode independent heat sink,which heat dissipation is good, and won't affect each other. 6. Using large size Sendust Core and double pure copper wiring, improve working efficiency, reduce fever. 7. 3296 multiturn potentiometer,high accuracy voltage and current regulation, good stability. 8. Double color lamp, working condition be clear at a glance 9. Voltage and current are adjustable,wich effect is good. Applications: 1. High-power LED driver. 2. Lithium battery(or lead accumulator) charge. 3. Vehicle-mounted power supply. 4. Low voltage system power supply. 5. 6V, 12V, 14V, 24V battery charge. 6. On-board laptop power supply. 7. regulated power supply. 8.Low voltage power supply system. Module adjustment: ￢ﾀﾋ 1. When the module output voltage can not be adjusted (the output voltage is always equal to the input voltage) Please adjust the potentiometer counterclockwise 20 laps (20 turns) or more till it works.￢ﾀﾋ 2. Turn trimmers CLOCKWISE to INCREASE, ANTICLOCKWISE to DECREASE. 3. When adjust the blue potentiometer,please use a multimeter to monitor the voltage 4. The trimmer nearest the voltage output adjusts the output CURRENT (CC) 5. The trimmer nearest the voltage input adjusts the output VOLTAGE (CV) Charger application - intructions: 1. First determine the float voltage and charging current required by the battery to be charged (the ‘target battery'). The target battery disconnected from the module output, apply a voltage of 7V - 32V to the module input, being sure to observe correct polarity. 2. Using the CV trimmer, adjust the output voltage to about 5V. 3. Switch your multimeter into its 10A current scale and measure the module's short-circuit output current. Turn the CC trimmer to adjust the current to the charging current required by target battery. 4. Using the CV trimmer, adjust the module's output voltage to the float voltage required by the target battery. 5. Connect the target battery to the module output, observing correct polarity. Charging of the battery should commence ￢ﾀﾋ Constant current LED Driver Application - Instructions: 1. First determine the operating current and maximum operating voltage of the LED you need to drive. 2. With the CV trimmer, adjust the output voltage to about 5V. 3. Switch your multimeter into its 10A current scale and measure the module's short-circuit output current. Turn the CC trimmer to adjust the current to the operating current of your LED. 4. Adjust the CV trimmer to make the output voltage reach the maximum LED operating voltage. 5. Connect LED, test. Package included: 3 x 8A 300W buck adjustable power supply module

Specifications: · 300W 8A 7-32V to 0.8-28V DC CC CV Buck Step-Down Converter Power Supply Step Down Module Adjustable Voltage Regulator LED Driver · High-power, constant current LED driver · Battery charger · Vehicle-mounted power supply · Low voltage system power supply · Non-isolated step-down CC CV Buck module with on-board LED load indicator · Input voltage: DC 7-32 V · Output Voltage: DC 0.8-28 V (Adjustable) · Output Current: 8A (MAX), more than 60Deg please strengthen heatsink · Continuous Current Range: 0.2-8A Adjustable · Output Power: 300W (MAX) · Conversion efficiency: 95% (more input voltage, more efficiency) · Output ripple: 50mV · Working Temperature: industrial (- 40 ° c to +85 °c) (environmental temperature, more than 40 degrees, please reduce power to use, or - enhance cooling) · No-load current: 20mA (input 24V,Output 12V for reference) · Voltage regulation: ± 1% · Load regulation: ± 1% · Dynamic response speed: 200uS 5% · Short circuit protection: YES · Input Reverse protection: No (please comply with a reverse protection or connect a diode at input parts.) · Size: 65 x 47 x 22 mm · On-board LED load indications: red = load present (eg. 'battery charging'), green = no load (eg. 'battery charged' or output disconnected) Features: 1. Fixed turn lamp current is 0.1 times the current value(Used to identify whether the battery is fully charged When charging). 2. Made from a dedicated benchmark IC and high-precision current sensing resistor, proving a more stable constant current, (when 20°C to 100°C constant current 1A, temperature drift less than 1%). Particularly suitable for LED driver. 3. High output current, the max output current can reach 8A. 4. Four high frequency capacitance, can lower output ripple, enhance the work stabilization. 5. Double heat sink design. MOS schottky diode independent heat sink,which heat dissipation is good, and won't affect each other. 6. Using large size Sendust Core and double pure copper wiring, improve working efficiency, reduce fever. 7. 3296 multiturn potentiometer,high accuracy voltage and current regulation, good stability. 8. Double color lamp, working condition be clear at a glance 9. Voltage and current are adjustable,wich effect is good. Applications: 1. High-power LED driver. 2. Lithium battery(or lead accumulator) charge. 3. Vehicle-mounted power supply. 4. Low voltage system power supply. 5. 6V, 12V, 14V, 24V battery charge. 6. On-board laptop power supply. 7. regulated power supply. 8.Low voltage power supply system. Module adjustment: ￢ﾀﾋ 1. When the module output voltage can not be adjusted (the output voltage is always equal to the input voltage) Please adjust the potentiometer counterclockwise 20 laps (20 turns) or more till it works.￢ﾀﾋ 2. Turn trimmers CLOCKWISE to INCREASE, ANTICLOCKWISE to DECREASE. 3. When adjust the blue potentiometer,please use a multimeter to monitor the voltage 4. The trimmer nearest the voltage output adjusts the output CURRENT (CC) 5. The trimmer nearest the voltage input adjusts the output VOLTAGE (CV) Charger application - intructions: 1. First determine the float voltage and charging current required by the battery to be charged (the ‘target battery'). The target battery disconnected from the module output, apply a voltage of 7V - 32V to the module input, being sure to observe correct polarity. 2. Using the CV trimmer, adjust the output voltage to about 5V. 3. Switch your multimeter into its 10A current scale and measure the module's short-circuit output current. Turn the CC trimmer to adjust the current to the charging current required by target battery. 4. Using the CV trimmer, adjust the module's output voltage to the float voltage required by the target battery. 5. Connect the target battery to the module output, observing correct polarity. Charging of the battery should commence ￢ﾀﾋ Constant current LED Driver Application - Instructions: 1. First determine the operating current and maximum operating voltage of the LED you need to drive. 2. With the CV trimmer, adjust the output voltage to about 5V. 3. Switch your multimeter into its 10A current scale and measure the module's short-circuit output current. Turn the CC trimmer to adjust the current to the operating current of your LED. 4. Adjust the CV trimmer to make the output voltage reach the maximum LED operating voltage. 5. Connect LED, test. Package included: 5 x 8A 300W buck adjustable power supply module

Specifications: · 300W 8A 7-32V to 0.8-28V DC CC CV Buck Step-Down Converter Power Supply Step Down Module Adjustable Voltage Regulator LED Driver · High-power, constant current LED driver · Battery charger · Vehicle-mounted power supply · Low voltage system power supply · Non-isolated step-down CC CV Buck module with on-board LED load indicator · Input voltage: DC 7-32 V · Output Voltage: DC 0.8-28 V (Adjustable) · Output Current: 8A (MAX), more than 60Deg please strengthen heatsink · Continuous Current Range: 0.2-8A Adjustable · Output Power: 300W (MAX) · Conversion efficiency: 95% (more input voltage, more efficiency) · Output ripple: 50mV · Working Temperature: industrial (- 40 ° c to +85 °c) (environmental temperature, more than 40 degrees, please reduce power to use, or - enhance cooling) · No-load current: 20mA (input 24V,Output 12V for reference) · Voltage regulation: ± 1% · Load regulation: ± 1% · Dynamic response speed: 200uS 5% · Short circuit protection: YES · Input Reverse protection: No (please comply with a reverse protection or connect a diode at input parts.) · Size: 65 x 47 x 22 mm · On-board LED load indications: red = load present (eg. 'battery charging'), green = no load (eg. 'battery charged' or output disconnected) Features: 1. Fixed turn lamp current is 0.1 times the current value(Used to identify whether the battery is fully charged When charging). 2. Made from a dedicated benchmark IC and high-precision current sensing resistor, proving a more stable constant current, (when 20°C to 100°C constant current 1A, temperature drift less than 1%). Particularly suitable for LED driver. 3. High output current, the max output current can reach 8A. 4. Four high frequency capacitance, can lower output ripple, enhance the work stabilization. 5. Double heat sink design. MOS schottky diode independent heat sink,which heat dissipation is good, and won't affect each other. 6. Using large size Sendust Core and double pure copper wiring, improve working efficiency, reduce fever. 7. 3296 multiturn potentiometer,high accuracy voltage and current regulation, good stability. 8. Double color lamp, working condition be clear at a glance 9. Voltage and current are adjustable,wich effect is good. Applications: 1. High-power LED driver. 2. Lithium battery(or lead accumulator) charge. 3. Vehicle-mounted power supply. 4. Low voltage system power supply. 5. 6V, 12V, 14V, 24V battery charge. 6. On-board laptop power supply. 7. regulated power supply. 8.Low voltage power supply system. Module adjustment: ??br /> 1. When the module output voltage can not be adjusted (the output voltage is always equal to the input voltage) Please adjust the potentiometer counterclockwise 20 laps (20 turns) or more till it works.??br />2. Turn trimmers CLOCKWISE to INCREASE, ANTICLOCKWISE to DECREASE. 3. When adjust the blue potentiometer,please use a multimeter to monitor the voltage 4. The trimmer nearest the voltage output adjusts the output CURRENT (CC) 5. The trimmer nearest the voltage input adjusts the output VOLTAGE (CV) Charger application - intructions: 1. First determine the float voltage and charging current required by the battery to be charged (the ‘target battery'). The target battery disconnected from the module output, apply a voltage of 7V - 32V to the module input, being sure to observe correct polarity. 2. Using the CV trimmer, adjust the output voltage to about 5V. 3. Switch your multimeter into its 10A current scale and measure the module's short-circuit output current. Turn the CC trimmer to adjust the current to the charging current required by target battery. 4. Using the CV trimmer, adjust the module's output voltage to the float voltage required by the target battery. 5. Connect the target battery to the module output, observing correct polarity. Charging of the battery should commence ??br /> Constant current LED Driver Application - Instructions: 1. First determine the operating current and maximum operating voltage of the LED you need to drive. 2. With the CV trimmer, adjust the output voltage to about 5V. 3. Switch your multimeter into its 10A current scale and measure the module's short-circuit output current. Turn the CC trimmer to adjust the current to the operating current of your LED. 4. Adjust the CV trimmer to make the output voltage reach the maximum LED operating voltage. 5. Connect LED, test. Package included: 3 x 8A 300W buck adjustable power supply module

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

1.25-32V DC Adjustable Power Step Down Module With DIY Case More information:  http://forum.Racer Gadgets.com/forum-topic-88337.html Description: Onboard voltmeter, ammeter, power meter Onboard USB interface (note: USB output voltage and the module output voltage is consistent, not fixed 5V output, To make sure the front USB device charging transferred to 5V, or else it may damage your equipment) High power, high efficiency, 5A, low ripple Use as a normal blood pressure modules with overcurrent protection capability As various voltage lithium batteries, batteries, nickel-cadmium nickel-metal hydride batteries (battery) charger for solar panels, wind turbines and other occasions Use a high-power LED constant current drive module With a constant voltage and constant current modes, the module has a light indicates which mode is currently in When used as a lithium battery charger, you can set the float voltage and charge current, there is light indicates that it is charging or is already full Having a limiting protection Feature:   Input voltage: 5-36V Output voltage: 1.25-32V continuously adjustable (can only be done step-down module, input must be greater than the output 2V above) Output current: adjustable, 5A (recommended for use within 4.5A, constant need to adjust the output voltage of 2V or older to current regulation, only in the constant state will work, and if used the red phone, not how much current regulation, the red phone number, and constant low resistance mainly to charge the battery directly or limiting the use of current limiting LED work, but also hope that buyers know.) Output Power: Max 75W (recommended for use within 50W, big differential pressure to reduce power use, please) Working temperature: -40 to + 85 degrees Operating frequency: 180KHz Conversion efficiency: up to 96% 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) Connection: terminals or solder terminals, V-IN is the input, V-OUT output Module size: 68.2mm x 38.8mm x 15mm Package included: 1 x 1.25-32V DC Adjustable Power Step Down Module 1 x DIY Case  (The Case is For DIY, Delivery of spare parts)

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Description: Name: LM2596 Multi-channel Switching Power Supply Size: 100mmx68mm Supply voltage range: 5V-40V The layout is regular, and the layout is strictly in accordance with the filter circuit design, with 3.3V/5V/12V, ADJ adjustable output of the 4-channel power, output ripple is small, easy to use, suitable for student competition module and personal project development. Note: Module ADJ output voltage is generally lower than the supply voltage of about 1V, the module single-circuit current is maximum 3A, the total current does not exceed 5A. Package included: 1 x LM2596 Multi Switch Power Supply 3.3V/5V/12V/ADJ Adjustable Voltage DC-DC Step Down Power Module LM2596 Multi Switch Power Supply 3.3V/5V/12V/ADJ Adjustable Voltage DC-DC Step Down Power Module LM2596 Multi Switch Power Supply 3.3V/5V/12V/ADJ Adjustable Voltage DC-DC Step Down Power Module LM2596 Multi Switch Power Supply 3.3V/5V/12V/ADJ Adjustable Voltage DC-DC Step Down Power Module

Specification: Module name: 250W boost static current module Module properties: non-isolation boost module (BOOST) Input voltage: DC 8.5-48V Input current: 10A (MAX), if exceeds 8A, please strengthen the heat dissipation Static working current: 10mA (12V up 20V, the higher the output voltage is, the higher the static current will increase) Output voltage: 10-50V continuous adjustable if necessary (default output 19V delivery) Output current: 10A MAX, if over 6A please strengthen heat dissipation. (Related to the input and output voltage difference, the larger the voltage difference is, the smaller the output current is) Constant current range: 0.2-8A Output power = input voltage * 10A, for example: input 12V * 5A= 60W, input 24V * 5A = 120W, input 36V * 5A = 180W, input 48V * 5A= 240W If you need more power, you can use two modules in parallel, such as the output of 10A, which can be connected in parallel with two modules, transfer the current of each module to 5A. Working temperature: -40 - +85??(please strengthen the heat dissipation when the ambient temperature is too high) Work frequency: 150KHz Conversion efficiency: maximum 96% (efficiency is related to input/output voltage, current, voltage difference) Over-current protection: yes (if more than 13A, it will automatic reduce the output voltage, a certain range of errors) Input reverse connection protection: yes, (less than 5A if you need more reverse connection current in the input string) Install mode: 4 3mm screw holes Connection mode: wiring output Module size: 69 x 35mm The adjustment method of output voltage/current: 1. Adjust the RV1 potentiometer according to your battery or LED, set the output voltage you need. For example, 10 series of LED voltage adjust 37V. 2. Turn the RV2 potentiometer around 30 times clockwise, and set the the minimum output current, connect the LED, and adjust the RV2 potentiometer to set the current you need. Note: please do not adjust the current in the short circuit, the circuit structure of the boost module cannot be adjusted in the short circuit. Application scope: 1. Make a stable power supply, input 12V, and output can be adjustable 12-50v. 2. Power supply for your electronic equipment, can set output value according to your system voltage. 3. Power supply for your laptop, PDA or various digital products as the on-board power supply. 4. DIY a large power laptop mobile power supply with a large lithium battery pack of 12V capacity, let your laptop go wherever it goes. 5. Stabilized solar panels. 6. Charge battery, lithium battery, etc. 7. Drive high-power LED lights. Package included: 1 x Boost power module

Feature: Input voltage: 8-60V, please keep the balance, it is recommended to use within 55V. Output voltage: 3V-32V continuously adjustable, automatically save the last set voltage (input voltage must be higher than the output voltage 1V above). Output current: maximum 7A, it is recommended to use within 5A, when the heat is big, please solve the heat dissipation problem by yourself. Note: The current size is adaptive to load, not adjustable. Anti-anti-input: YES Short circuit protection: YES Accuracy: 1%, three voltage display, two current display, the unit is A. Conversion efficiency: up to 95% (efficiency is related to input, output voltage, current and pressure). Load regulation: S (I) ≤0.8%, voltage regulation: S (u) ≤0.8% Size: 62mm * 44mm * 18mm Weight: 45g If used for charging, when charging is completed, please disconnect the battery terminal first, and then disconnect the input to prevent battery backflow damage to the module! Or add a anti-reflux diode at output. Calibration instructions: The module with a calibration function, do not worry about the problem of measurement shows inaccurate, if you find that the display is inaccurate or the value of stuck, or left and right buttons can not be mobilized voltage, you can use the following method of calibration. Voltage calibration method: Under no-load condition, press and hold the left button to connect to the power supply, release the left button, the voltage value of the display begins to flash, measure the output voltage with a multimeter, and press the left and right keys to set the same value with the meter, Such as: multimeter measurement is 12.6V, the module set to 12.6V, it can be automatically saved three seconds, re-power voltage calibration is completed. The error can be calibrated within 0.05V, if the error is bigger, you can try again. Current calibration method: After calibrating the voltage, load, first use a multimeter to measure the actual current value, then power off the board, press and hold the right button to connect to the power, release the right button, the screen current value starts flashing, press the left and right button to adjust value the same with the multimeter, for example: the multimeter measurement value is 1.8A, the module can be adjusted to display 1.8A, three seconds automatically saved, re-power on the current calibration is completed. Package includes: 1 x Power Supply Module with housing

1PCS XL6009 DC-DC Adjustable Step-up Power Converter Module is available now from our US and UK warehouse Free shipping to US and UK in 3-6 business days ship to  Other European countries in 7-10 days 3A XL6009 DC-DC 50KHz Adjustable Step-up Power Converter Module Specification: Wide Input voltage: 3V-30V Output Voltage: 4-35V (Adjustable) Output current: rated current 3A MAX (Heat-sink Needed) If you need its output power greater than 15W, please add with heat-sink Conversion efficiency: Up to 92% (output voltage higher, the higher the efficiency) Switching Frequency: 50KHz Rectifier: Non-Synchronous Rectification Short circuit protection: current limiting, since the recovery Operating temperature: Industrial grade (-40 ℃ to +85 ℃) (output power 10W or less) Full load temperature rise: 40 ℃ Load regulation: ± 0.5% Voltage regulation: ± 0.5% Size:47 x 26 x 15 mm Package included: 1x XL6009 DC-DC 50KHz Adjustable Step-up Power Converter Module