Best DC Power Supplies Review, DC Power Supply Variable Voltage Buying Guide 2020

7 Best DC Power Supply Variable Voltage Power Supplies

DC Variable Power Supply – With one of the best hobbyist benchtop power supply, you can get the ideal voltage supply you need for your project. Also, with these devices, you can get the freedom to regulate the control and voltage supply using simple dials, which adds extreme benefit to these power supply devices.

We are here with a list of best hobbyist benchtop power supply units that are perfect for you. Also, there is a comprehensive buying guide so that you can select the best device according to your needs.

Best Hobbyist Behcntop Power Supply Reviews

Table of Contents

Here is a list of best 7 DC Power Supply Variable Voltage Power Supplies

1. LONGWEI DC Power Supply Variable

Longwei Power Supply – DC Power Supply Variable Voltage

If you need a lightweight power supply device, then you can consider this device from LONGWEI. The overall weight of the power supply is around 4 pounds, which makes it an ideal benchtop device. You can set up the device on the go by connecting the dedicated wires. Also, it is a budget device that will not burn a hole in your pocket.

Longwei Power Supply - DC Power Supply Variable Voltage

Bestseller No. 1
DC Power Supply Variable,0-30 V / 0-10 A LW-K3010D Adjustable Switching Regulated Power Supply...
  • ◆【High Precision, Wide Range】LONGWEI DC power supply is a professional power supply...
  • ◆【High Quality with Essential Safety】Safety is our priority. Grounding wire, The power...
  • ◆【Excellent Heat Dissipation】Equipped with a big fan controlled by intelligent...

High Precision Display

The digital display attached to this hobbyist power supply is intuitive, which means that you will get clear and readable. The LED display is of high quality, and there is nothing to complain about.

Excellent Heat Dissipation

There is no need to worry about the heat produced by the power supply while working. This device has a built-in cooling fan that keeps excess heat at bay while keeping the power supply cool while working. Moreover, the noise produced by the fan is less so you can focus on your work without getting distracted.

Protection Guaranteed

With this hobbyist power supply device, you will get guaranteed protection against over-current and over-temperature. You can rest assured that there will be no damages to the circuit of your project when you have this power supply device. It also has limited flow protection (OCP) so that you can limit the flow of the current.

Sturdy Body

The body of this power supply is sturdy and reliable. There is no need to worry about any easy damages as the body and the control knobs are of decent quality.

LONGWEI DC Power Supply Variable

Pros

  • Easy to use
  • Portable
  • Controllable current supply
  • Institutive display
  • Affordable

Cons

  • Ideal for small jobs

LONGWEI DC Power Supply Variable FAQs

1. Is this power supply device isolated with earth ground?

Yes, this power supply device is earth ground isolated.

2. Are there any safety protections?

This LONGWEI power supply has the required safety features like over-current and overload protection.

3. What is the weight of this unit?

The overall weight of this unit is around 4 pounds.

2. Tekpower TP1803D Lab Grade Variable Linear DC Power Supply

Tekpower Variable Linear DC Power Supply – Tekpower DC Power Supply Review

Here is another compact and lightweight hobbyist power supply device for you. It is an affordable device that has a maximum current output of up to 3 Amps and voltage up to 18 volts. You can easily set this power supply on your bench to get the required amount of power at any time.

Tekpower Variable Linear DC Power Supply - Tekpower DC Power Supply Review

Bestseller No. 1
Tekpower TP1803D Lab Grade Variable Linear DC Power Supply 0-18V @0-3A with Alligator Cable and...
  • High precision DC regulated power supply with 0-18 volts and 0-3 amp outputs
  • DC Linear Power Supply with Super stable Output
  • Light weight with heavy Output

Output Regulator Switch

The device has two output regulator switches that will assist you in adjusting the amount of voltage and current you need for your specific purpose. These knobs are easy to hold, and you can check the output readings on the digital display to make sure that you are getting the required power.

Easy to Use

This power supply device is easy to use. The overall weight of this device is around 7 pounds, and you can move it whenever needed. Also, it comes ready to use, and all you have to do is connect the required wires to start using it.

Digital Display

The power supply device has two digital displays dedicated to current and voltage, which makes it an ideal device for beginners and professional users. You can easily identify the readings based on the display.

Powerful Heat Dissipation

There are two cooling fans attached to the power supply device for keeping it cool. This device has ultimate heat dissipation, and it will keep excess heat out of the power supply device.

Tekpower TP1803D Lab Grade Variable Linear DC Power Supply

Pros

  • Affordable
  • Lightweight
  • Low ripple for fine use

Cons

  • Quality could be better

Tekpower TP1803D Lab Grade Variable Linear DC Power Supply FAQs

1. How many watts is this power supply device?

This hobbyist power supply device is 54W. It is a 18Vx3A device that sums up to 54W.

2. Does this come with over-current protection?

Yes, this device comes with a current limiter, so you can say that it has protection against over-current. But if you are using the device in high current settings, then there is less protection against current issues.

3. What is the input voltage?

The input voltage of this power supply device is 120V/60Hz.

3. Tekpower TP3005P Programmable Linear Type Variable Regulated DC Power Supply

Tekpower DC Regulated Variable Power Supply – Variable Voltage DC Power Supply

Tekpower is here with another power supply that is perfect for the professionals out there. This is a heavy-duty device with low ripple and less noise. Also, you get better control over the machine, all thanks to the multitude of control buttons and digital display.

tekpower tp3005t programmable linear type variable regulated dc power supply

Bestseller No. 1
Tekpower TP3005P Programmable Linear Type Variable Regulated DC Power Supply, 0-30V at 0-5A
  • Single-output programmable variable DC regulated power supply with dual LED displays adjusts...
  • Pro-level precision and accuracy with low noise and low ripple, plus built-in memories to...
  • USB interface enables remote control, operation, data exchange via a computer (Windows PC...

Memory Function

If you have to adjust the settings every time you set up the power supply device, then you need this device right now. It comes with a built-in memory function so that you get the preferred settings every time you turn the machine on. As a result, you get better productivity without wasting time in achieving the desired settings again and again.

Auto Shutoff

The device comes loaded with OCP (over current protection). It will shut off automatically after sensing over-current to protect the machine and your project. Now there is no need to worry about anything even if you are working with high current output.

Dual LED

The digital display shows two readings simultaneously for voltage ad current output. The maximum voltage you can achieve with this device is around 30 Volts, and the maximum current is around 5 Amps.

USB Interface

With the help of the USB interface, you can store the date and can access it into your PC. The manufacturer offers software and a cable so that you can connect this power supply device with your PC. The only downside of the software is that it only works in Windows PC.

Tekpower TP3005P Programmable Linear Type Variable Regulated DC Power Supply

Pros

  • Single output programmable
  • Thermo sensor with the cooling fan
  • Insulation protection for output sockets
  • CE certified

Cons

  • The software doesn’t work with MAC OS and other systems
  • Expensive

Tekpower TP3005P Programmable Linear Type Variable Regulated DC Power Supply FAQs

1. Can I use this power supply device for small current ranges or for holding constant current?

Yes, this device will help you in supplying small current ranges without any hassles. Also, you can hold constant current using it.

2. Does it allow us to adjust the current and voltage settings independently?

With this power supply device from Teakpower, you can adjust the current and voltage independently. Also, the current will remain constant while you are adjusting the voltage and vice versa.

3. Is there any cooling fan in the device?

Yes, it does come with a cooling fan that helps in dissipating excess heat.

4. Tekpower TP3016M Portable Handheld Variable DC Power Supply

Portable DC Power – Portable Emergency Power Supply

This is one of the most compact power supply devices available out there. If you need something handy and easy to use, then you can get this hobbyist power supply device. The device belongs to Teakpower, so you can expect decent quality from it. Also, it is lightweight, and you can carry it with you whenever you need it.

tekpower tp3016m portable handheld variable dc power supply review

Bestseller No. 1
Tekpower TP3016M Portable Handheld Variable DC Power Supply with USB Port, 0.3V - 12V @ 0-3.75A or...
  • Word First Handheld Power Supply with precision CC and CV,0-30 volts@ 0-1.6 amp or 0-12V @4.0A
  • 4 digits LCD display,Output short circuit protection,
  • High speed dynamic response,Once power cut-off, automatically protect under power off status

Two USB Ports

This handheld power supply device has two USB ports, and you can use it for different tasks, including repairing smartphones. Also, it is an excellent tool for testing, and you can do multitasking with it using the two USB ports.

4 Digit LCD Display

The four-digit LCD shows accurate readings for the voltage and current you are getting from it. Also, you can adjust the output supply using the easy-press buttons available on this portable benchtop power supply device.

Auto Shutoff

The device comes loaded with over-current protection, and it shuts off automatically after detecting high current. Your devices will remain protected it you use this power supply machine.

USB Recognition

Whenever you plug any device using a USB port, then this machine will automatically recognize it. You can also use the port for software calibration, which is an added benefit.

Tekpower TP3016M Portable Handheld Variable DC Power Supply

Pros

  • Handy and lightweight
  • Precise CV and CC
  • Excellent after-sales service
  • Short circuit protection

Cons

  • Display is small

Tekpower TP3016M Portable Handheld Variable DC Power Supply FAQs

1. Can I calibrate this device?

Yes, you can calibrate this power supply device as it comes with two USB ports.

2. What are the specifications of Teakpower TP 3016M?

The specifications of this power supply device are as following:

Input Voltage: 110-220V/AC, 50-60Hz

3. Which material is used to make the body?

The body is made using metal so you can rest assured that it is not a cheap plastic power supply device.

5. Dr.meter 30V/5A DC Bench Power Supply

Dr Meter DC Power Supply – Dr Meter Power Supply Review

Dr Meter DC Power Supply – You can get this benchtop power supply device if you need a reliable machine. It comes with a lot of features, and the handle makes it a portable device. There is a cooling fan as well, and you can use this power supply device for an extended period without worrying about excessive heat generation.

Dr Meter DC Power Supply - Dr Meter Power Supply Review

Bestseller No. 1
30V/ 10A DC Power Supply, Dr.meter Variable 4-Digital LED Display Power Supply, Multifuncitonal and...
  • ▶ 【High Precision, Wide Range】The DC power supply is a professional power regulation...
  • ▶ 【5V/2A Output & Auto Power Calculation】Run out of power? Now you can charge your phone,...
  • ▶ 【Excellent Heat Dissipation】Equipped with a big fan controlled by intelligent...

Auto Conversion

Now there is no need to use a calculator to convert the readings while using this power supply device. It comes with the auto conversion of A into mA, and you can check the readings directly from the digital display.

Side Cooling Design

There are small vents available at the side as well, so the device remains cool while using. These vents are available on both sides, so there will be no damage to the circuit due to over-temperature.

Stop/Out Button

If you want to halt the output supply for any purpose, then you can use the stop button. This button will prevent the need to turn off the machine, and you can keep working with the preferred settings. Press Out button when you want to replenish the supply again.

Wide Applications

This benchtop power supply device is ideal to use at home, schools, laboratories, production lines, and much more. It can handle more power so you can draw more output by using it.

Dr.meter 30V/5A DC Bench Power Supply

Pros

  • Higher stability
  • Automatic CV and CC
  • Auto cooling fan
  • Side vents for better dissipation
  • 3 LED digital display

Cons

  • The fan produces noise while working

Dr Meter DC Power Supply FAQs

1. What are the exact dimensions of this unit?

The dimensions of this unit without the power cord connected are: 11″ x 5″ x 6″.

2. Can I use it to charge batteries?

Yes, you can use this power supply device to charge batteries. But you need to set the accurate current and voltage to charge the batteries to protect them from any damages.

3. Is there any repair or schematic information available with this device?

No, there is no repair or schematic information available with this device, but you can contact the manufacturer is you need any assistance.

6. TekPower TP12001X 120V DC Variable Switching Power Supply Output

DC Adjustable Power Supply – Switching Mode DC Power Supply

The users that need a power supply device with a low ripple effect can consider having this power supply device. You can continuously adjust the power supply based on your requirements while keeping the current or the voltage as constant.

tekpower tp12001x 120v dc variable switching power supply output - Switching Mode DC Power Supply

Bestseller No. 1
TekPower TP12001X 120V DC Variable Switching Power Supply Output 0-120V @1A, Digital Display with...
  • Output Voltage: 0- 120V DC with low ripple
  • Current Output:1 A DC with low ripple
  • Front Connection

Overheat and Overload Protection

The device comes equipped with overload and overheating protection, which are the two major causes of damages while testing. Moreover, there is no need to use an external device to protect the power supply.

Large LCD Display

You can easily check the readings displayed on the large LCD. Also, it becomes easy to check the voltage and current readings when you have a device with a clear display. This power supply has an LCD with backlit, so you can even determine the readings even if there is dark in the room.

Front Connection

It is quite hard to adjust the connections when all the ports are available at the backside of the power supply. But with this device, you will get front connections, and you can remove or attach any cable anytime using this device.

Fuse Protection

When you have TeakPower TP 12001X, then there is no need to worry about short circuits. The device comes with a built-in fuse that will protect the machine in case of any short circuits.

TekPower TP12001X 120V DC Variable Switching Power Supply Output

Pros

  • Lightweight
  • Easy to use
  • Excellent heat dissipation
  • Power on/off button

Cons

  • A bit pricey

TekPower TP12001X 120V DC Variable Switching Power Supply Output FAQs

1. Can I use this unit as a negative voltage supply?

No, you cannot use this device as a negative voltage supply.

2. Is this model 60Hz or 50Hz?

The model is 60Hz.

3. Is there any memory function available?

No, there is no memory function available with this device. You have to adjust the settings every time you use it after powering off.

7. Tekpower TP3005T Variable Linear DC Power Supply

Linear Power Supply vs Switching – Linear Power Supply Diy

TekPower is here with a heavy-duty power supply device that comes loaded with a plethora of features. It is an affordable device, so anyone can buy it without breaking the bank. Also, you will get all the cables in the box, and you can use them for your projects.

tekpower tp3005t variable linear dc power supply review

SaleBestseller No. 1
Tekpower TP3005T Variable Linear DC Power Supply, 0-30V @ 0-5A with Alligator Test Leads
  • High precision DC regulated power supply with 0-30 volts and 0-5 amp outputs
  • Two operational modes: constant voltage and constant current
  • Cooling fan automatic activation by built-in thermo-sensor

Significant Display

The size of the display is considerable, and it is big enough so that you can identify the readings easily. Also, it supports backlit so you can check the readings even in the dark.

OCP On/Off

You can turn off the OCP any time when you need it. There are very few power supply models available in the market with adjustable OCP, and this is one of them.

Current Lock

If you need a constant current supply, then you can lock the current know by pressing it for some time. You can unlock it again when you need to adjust the current output.

Portable

There is a handle attached to the power supply device, which makes it a portable device. The overall weight of this device is around 12 pounds, so you can carry it with you.

Tekpower TP3005T Variable Linear DC Power Supply

Pros

  • Inexpensive
  • Easy to use
  • Metal body
  • Constant Current and Constant Voltage Mode

Cons

  • No built-in short circuit protection

Tekpower TP3005T Variable Linear DC Power Supply FAQs

1. Do the leads have diodes?

No, there are no diodes attached to the leads. This power supply device has simple alligator clips.

2. What is the minimum current I can get with this unit?

You can get a minimum current output up to 0.1A with this device.

3. How to adjust the current and voltage?

You can use the knobs to adjust the current and the voltage as per your requirements.

Buying Guide: Things to Look For in a Hobbyist Benchtop Power Supply

Buying the best hobbyist benchtop power supply device requires you to focus on some parameters and features that will impact its performance. Here in this buying guide, we have highlighted these features so that you can buy the best device for your money.

Maximum Current and Voltage

You need to know how much current and voltage the benchtop power device can offer. Also, you should check whether it can provide high power so that you can fulfill your needs. If you need a benchtop power supply device to supply voltage to some circuit, then you should check whether it has a DC power envelope or not.

With the help of the DC power envelope, you can check the current values drawn by the power device at different voltages.

Number of Channels

Using a single output channel is inexpensive as compared to using multiple channels, but not all tasks require a single channel. It is entirely based on your requirements and needs if you need a power supply device with multiple channels, then you can go with it. On the other hand, if you have a limited budget and requirements, then you can buy a power supply device with a single channel.

Current Limiting Control

If you are a beginner, then we suggest you select a benchtop power supply device that comes with the current limiting control switch. You can use this switch to control the supply of current to remain safe during the project. Moreover, you can protect the equipment from over-current by using the limiting switch.

Switching Vs. Linear

Generally, power supply devices are available in linear mode or switching mode. The core difference between these devices is the process of how DC power is produced. Each of these has its own pros and cons. But when we talk in general, then switching mode is more compact and light. If you want to power sensitive analog circuitry, then we recommend you to choose a linear design because it has less electrical noise.

Weight

Check the weight of the power supply before buying it. Normally, these devices are portable, but still, it is better to check the weight and dimensions beforehand.

Digital Display

These days most of the power supplies available in the market have a digital display to help the users with exact readings. It would be great if you check the digital display before making your purchase decision.

Budget

Lastly, these power supplies are available in a myriad of prices. It is ideal for making your budget before you shop for a benchtop power supply device.

Final Words

These are some of the best hobbyist benchtop power supply devices available out there. You can refer to the buying guide and FAQs to get some more clarity about these devices. All the power supply units listed here belong to renowned brands and have decent after-sales services.

Also, Read

Do let us know what you think is the best hobbyist benchtop power supply unit, according to you. Leave your replies in the comment section.

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