The Best variable power supply kits of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best variable power supply kits of 2022. Check our ranking below.

2,880 Reviews Scanned

Rank No. #1

LM317 Adjustable Voltage Regulator Kit, PEMENOL AC-DC 110V to 1.25V-12V Electronic DIY Adjustable Signal Generator Output LED Display DC Power Supply Electronic Kit for DIY Warm Air Blower

★Adjustable Regulated Power Supply: It is an AC-DC 110V to 1.25V-12V LM317 Adjustable Step Down Power Supply Buck Voltage Converter LED Display DIY Kit. The module can output stable voltage. You can change output by operating a potentiometer
★Multifunctional Welding Training Kit: This kit is suitable for teaching and training as well as for beginners to practice. It is a good choice for electronic enthusiasts. Very good for training your kid's and student's Hands-on ability and learning ability. Please read the user manual for the welding method
★RC Signal Generator: 1 channel adjustable signal generator output, convenient to provide pulse signals to the experimental circuit. Because the output current is not large, it is only suitable for powering small current circuits. If the power supply load is too large, the voltage will drop. Can't charge the phone
★Logic Signal Test Circuit: The adjustable regulated voltage power supply electronics kit has a logic pen function, which is convenient for testing the logic level of the circuit. With 1 channel buzzer. Can test the continuity of the wire, and can also test low-frequency signals
★Application: It can be used as a low-power power supply, signal generator, and logic signal tester. There is a buzzer function for sensor alarms, such as soil moisture alarm, temperature alarm, etc.

Rank No. #2

WEP 605D-III DC Variable Power Supply 60.00V 5.000A High Precision Bench Lab Power Supply with Alligator Clips for anodizing kit, Electroplating, arduino, breadboard

This variable power supply provides accurate numerical voltage reading up to 00.01V (Every 10mV), current reading up to 0.001A (Every 1mA), power reading up to every 0.1W. Comes standard with automatic Constant Voltage, Constant Current function.
You can easily adjust the lab power supply's output to the precise parameters you need, no more fiddlign with corase and fine adjustment dials. This bench power supply's adjustment dials are made from digital rotary encoders, this gives greater lifespan even when used frequently. Plus, you don't need to short-circuit the terminals to set the adjustable power supply's parameters.
This dc power supply comes with short-circuit protection, active temperature management, overload protection (CC/CV mode), The power supply cuts power, play a warning beep, and shows code "ScP" when a short circuit is detected. The cooling fan activates automatically to maintain optimal operation temperature, and the adjustable power supply cuts power and enters protection mode once overheat is detected.
This compact dc power supply is similar to the size of a lunch box, saving precious work space. The power supply has a maximum power of 300W supporting maximum output of 60V 5A. It has a strong power capacity, and its voltage drop is low when powering a load.
This WEP dc power supply variable is covered by our exclusive 1-year USA technical support, with 24-hour assistance from our dedicated team. Note: This product is rated for 110-127V USA specifications. Do not connect this iron to a 220V power socket.

SaleRank No. #3

NICE-POWER DC Power Supply Variable 0~30V 0~10A, 3-Digits LED Display Current and Voltage Adjustable 150W Fixed with Encoder DC Bench Power Supply 15V 10A/30V 5A,Electroplating DIY etc DC Power Supply

Newly upgraded 150W DC power supply with higher voltage and current: This DC power supply can be freely switched between 15V 10A and 30V 5A. When the current value is set to 10A, the voltage value cannot exceed 15V. If the voltage value is set to 30V, the current value cannot exceed 5A. [The device can only output 150 W, but don't worry, the device cannot be set to output current and voltage values exceeding 150 W.]
Ultra small size, Ultra full functionality, Cool fan automatic start : This DC power supply is only 10*18.5*8CM in size and weighs less than 1KG. It is lightweight, portable, and compact in design. When you cannot fit a larger power supply, this DC power supply is the most cost-effective choice. The DC power supply cool fan automatic starts, allowing the DC power supply to quickly cool down and extend its service life
3-Digit display and Encoder button precise adjustment : The voltage value of the DC power supply is accurate to 0.1V, while the current is accurate to 0.01A. By using the latest encoder buttons, the desired current and voltage values can be accurately adjusted. Just "set" the voltage and current, not "adjust" them. You can press the voltage and current encoder knobs to select the number to be adjusted, and then rotate the knob to set the value between 0 and 9. Each number can be easily set through a precise encoder knob. Encoder switches have replaced potentiometer switches, making your work easier, more accurate, and more efficient
Instructions for use: (Please note: That when the DC power supply is too hot, please stop using it and wait for it to cool down before use to prevent irreversible damage to the DC power supply.)
Wide range of input AC voltage: The input AC voltage is 100V~240V of NICE-POWER DC power supply model is SPS-E3010, and the frequency is 50~60Hz±10%, which meets the use of more than 90% of the countries and regions in the world. No matter where you are, you can use this DC power supply safely without the use of a transformer, which is safer and more secure

Rank No. #4

NICE-POWER DC Power Supply Variable 30V 10A, Adjustable Switching Regulated DC Bench Power Supply with Output Switch High Precision 4-Digit LED Display, Benchtop Lab Power Supplies with 5V/2A USB Port

Precise 4-digit LED Display, Auto Power Calculation: The NICE-POWER DC power supply variable is a professional switching power supply regulation device with a high resolution of 0.01V and 0.001A. The variable power supply features a big bright 4-digit LED display that shows the adjustable power supply output values of Voltage (V) / Current (A) / Power (W) in real-time. The high-definition backlit 4-digit LED display provides an accurate and clear readout for the voltage, current and power values even if you are in low-light condition
Output Switch Control: Sometimes we need to switch between different voltage or current outputs in experiments or work, but we often forget to turn off the output and causing damage to the load. The adjustable DC power supply OUTPUT key is designed to solve this problem, just with a single press of the added OUTPUT key, you can easily turn the output on or off. The required voltage and current can be adjusted without actual output power, which makes this benchtop DC power supply more secure and more energy saving. Also, you don't need to remove the load or turn off the power each time, making the variable DC power supply more convenient and efficient to use
Reliability and Safety: Safety is our priority, all lab power supplies are CE & FCC certified. The adjustable switching regulated power supply is built with premium electronic components and reliable circuit designs that include multiple protection functions, such as leakage, grounding terminal, over-voltage, over-current, over-power, over-load, over-temperature, short-circuit protection to ensure stable working performance and prolong the life of the adjustable DC power supply effectively. Kindly Remind -For safety considerations, the DC power supply comes with only 110V input which meets the US standard voltage. 220V input is NOT available for this bench power supply
5V 2A USB Port, Intelligent Cooling Fan: Complaining about mobile phones or repaired devices not being charged in time? The NICE-POWER adjustable DC power supply allows you to avoid this dilemma. The variable power supply has built-in 5V 2A USB charging interface which can quickly charge any USB devices anytime. The adjustable power supply features with intelligent temperature-controlled fan and heat sink for excellent heat dissipation when the working temperature of the switching power supply exceeds 122℉/50℃, greatly reduce working noise and improving the DC regulated power supplies working efficiency and lifespan
Compact Design, Lightweight and Portable: The DC voltage stabilized power supplies adopt stable vertical design with the shock-absorbing rubber feet on the bottom of bench supply, making it safer and more stable when using. The size of adjustable DC power supply is 8.4*3.3*5.5 inches and the lab power supply weighs only 2.6 lbs, which is very light and portable. You can carry your bench supply in and out of various workplaces

Rank No. #5

HiLetgo 0-30V 2mA-3A Adjustable DC Regulated Power Supply DIY Kit Short with Protection

Adjustable DC Regulated Power Supply DIY Kit
Input Voltage: 24V AC
Input Current: Max 3A
Output Voltage: 0-30V (continuously adjustable)
Output Current: 2mA-3A (continuously adjustable)

Rank No. #6

120W Universal Power Supply Adjustable DC 3V ~ 24V Variable Switching AC/DC Adapter 100V-240V AC to DC 24V 5A Converter with 14 Tips & Polarity Converter - 5000mA Max

Input: AC 100~240V, 50/60Hz; Output: DC 3~24V Adjustable, Max 5A 120W; It can apply to most appliances which the input voltage is between 3V to 24V and the rating power is equal to or less than 120 Watt
14pcs DC Tips: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal connector. Easily meet the power requirement of your different devices
Built-in Multiple Safety Protection Systems: Automatic over voltage cut-off, over current cut-off, over temperature cut-off, short circuit cut-off. No noise, no explosion, no fire hazard, safe to use. 6ft long power cable makes it convenient to use
Wide Range of Applications: The 120W all-in-one multipurpose AC/DC adapter fit for many 3~24V small household electronics such as LED strips, 3D printer, smart speaks, wireless routers, DC motor, DVR NVR surveillance system etc. For indoor use only
Package Includes: 1 x 3~24V 5A universal ac/dc adapter, 14 x DC tips, 1x reverse polarity converter. If you have any questions, please feel free to contact us via Amazon, and we are here for you

SaleRank No. #7

DC Power Supply Variable, Bench Power Supply with Encoder Adjustment Knob, Output Enable/Disable Button, Adjustable Power Supplies with USB Quick-Charge, Short Circuit Alam (30V 10A Black)

High-precision Encoder Knob: Different from general knobs, this DC power supply has a precise encoder knob. You can press the knob to switch each digit, and then turn the knob to customize each digit in the range of 0-9. Set the voltage or current you want more accurately.
Output Enable/Disable Button: In the process of using the bench power supply, Output button can prevent us from forgetting to turn off the output and causing damage to the load. Just press this button to turn on or turn off the output of the power supply. This makes it more convenient for you to use the variable power supply.
Overcurrent Protection: When the OCP function is turned on, if the load equipment is short-circuited during operation, the adjustable power supply will automatically stop output and send a buzzer to alert the user. Protect the adjustable power supply and load from damage.
Precise 4-digit LED Display: The dc power supply is equipped with a high-definition 4-digit display with data accurate to 0.01 V and 0.001 A. It has constant voltage (C.V.) and constant current (C.C.) modes, which can be switched automatically. You can see the working status indicator on the display. Additionally, you can adjust the brightness of the screen according to your needs.
USB Fast Charging Port: The variable power supply is configured with an 18W fast charging port. No more mplaining about mobile phones or repaired devices not being charged in time. The NANKADF dc power supply allows you to avoid this dilemma. It charges your devices quickly anytime, anywhere.

Rank No. #8

Adjustable DC Power Supply, Variable Output 12V 9V 7.5V 6V 4.5V 3V / Max 2A, PS-28A Benchtop Power Supply, Dual LCD Display, Fuse Protection, No Noise

Regulated output of 3V, 4.5V, 6V, 7.5V, 9V and 12V (1.5-15VDC), output current of max. 2A, and input voltage of 90-253VAC, 47-63Hz
DC power supply variable equipped with fuse protection, constant current and short-circuit protection, over-temperature protection
Variable power supply features dual LCD screens to respectively display output voltage and output current
Benchtop power supply designed with premium ABS housing, sturdy and lightweight, convenient to carry and transport
Minimalist design with compact body and concise outlook, no fan, no noise, great for technicians and hobbyists

Rank No. #9

WANPTEK POWER DC Power Supply Variable 0-30V 0-10A, Adjustable Switching Regulated Bench Power Supplies with Encoder Corase & Fine Knob, 3.6A USB & Type-C Quick-Charge, Overcurrent Protection(OCP)

Upgraded DC Power Supply: The upgraded DC power supply integrates various advanced functions. For example, precise coding knobs, USB and type-c fast charge, OCP short circuit alerts, high-definition four-digit display and multiple security protection Settings
Coarse and Fine Coding Knob: Unlike other coding knobs, this bench power supply is equipped with coarse and fine tuning coding knobs, the coarse tuning knob sets the value before the decimal point, and the fine tuning sets the number after the decimal point. The combination of the two knobs greatly improves efficiency
USB and Type-C Charging Port: One of the major advantages of our variable power supply over other variable power supplies is the addition of the TYPE-C fast charging port, which is different from the normal USB charging port and has a 5V/3.6A output for quickly charging your cell phone or other device, or for charging a device to be repaired
Short Circuit Alarm: Safety always comes first. When the load equipment is short-circuited, the adjustable power supply will automatically stop the output and emit a buzzer to remind the user. Not only that, the adjustable power supply also has the functions of grounding wire, leakage protection, overheating protection, voltage overload protection and power overload protection
Wide Applications: The adjustable dc power supply features an intelligent temperature-controlled fan and heat sink for excellent heat dissipation and is especially suitable for laboratory, electronic repair DIY, communication equipment maintenance, products line, scientific research and teaching units

Rank No. #10

JAMECO RELIAPRO 20626 Dual-Output Adjustable Linear Regulated Power Supply Kit

Adjustable positive / negative supplies: ±5 to ±15Vdc, 175mA to 750mA per supply
LED on indicator
120Vac input
48-Piece kit
PC board construction

Last update on 2025-06-19 / Affiliate links / Images from Amazon Product Advertising API

How Do You Buy The Best variable power supply kits?

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Potential sources can include buying guides for variable power supply kits, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible variable power supply kits. Make sure that you are only using trustworthy and credible websites and sources.

We provide an variable power supply kits buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available variable power supply kits currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

Brand Value: Every brand of variable power supply kits has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an variable power supply kits?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your variable power supply kits.
Customer Ratings: Number ratings grade variable power supply kits objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their variable power supply kits.
Product Quality: You don’t always get what you pay for with an variable power supply kits, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an variable power supply kits is should be an indication of how long it will work out for you.

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FAQ:

Q: What is a variable power supply used for?

A: A variable power supply is a useful tool for anyone who has a background with electrical circuitry and components. It also has many uses other than just testing. Ad. In addition to being used to test circuits, this type of power supply may be used by miniature hobbyists as well.

Q: What is a variable DC power supply?

A: Variable DC power supplies are AC to DC power supplies with a variable DC output. The output can be varied with an SCR controller. The AC input power can be single phase or three phases. With single phase AC input, the DC output ripple is very high (50%).

Q: What is a variable AC supply?

A: A variable AC power supply is valuable in these situations. These types of power supplies are also very useful for brownouts — i.e. low line-voltage conditions — as they can be used to boost line voltage to regular levels.

Q: What is a variable power source?

A: A variable AC power source is a controlled, yet variable, voltage solution. Variable AC power sources are commonly used in conjunction with test equipment to simulate extreme variations of voltage condition.