Kungber DC Power Supply Variable, 30V 5A Adjustable Switching Regulated DC Bench Linear Power Supply with 4-Digits LED Power Display 5V2A USB Output, Coarse and Fine Adjustments with Alligator Leads

  Anyone can connect a multimeter and declare it to be fantastic, but an oscilloscope will reveal the true quality (or lack thereof). br>While the price is extremely low, the output power has a lot of noise. br>The image has a rating of three. 3V output with almost 2010% ripple.

Ada Wilson

| Dec 17, 2021

Set at 3. It was true at 65 volts. To top balance my LifePO4 batteries, I purchased this device. I chose 3 as the number. Set it to maximum amps and 65 volts in Constant Voltage mode. The amps decreased as the voltage remained constant as it reached its peak. It took a while because I had eight 280AH batteries in the string, but once it was finished, all of the batteries were at 3. 65v. I had two strings of eight batteries to work with. This is something I'll use for future projects. The fact that it's light is both a benefit and a drawback. You can move it around easily, but it's also easy to knock it around, so be careful where you put it. br>br>I'm not an expert or an equipment snob, but it worked perfectly for my needs. If I needed something else, I'd buy it again.

Nicole Stevenson

| Nov 25, 2021

Summary: br>It appears that this power supply is geared toward hobbyists. It aims to offer basic functionality (no bells and whistles) at a lower cost than many other power supplies. It succeeds for the most part. To make this unit more user-friendly, the controls could be improved. As is, it's a viable option if you're willing to put up with the controls in exchange for a less expensive power supply. This would be an ideal entry-level game if the control issues were resolved. supply of power at a certain level br>br>Recommendation: br>br> br>If you're a hobbyist looking for a low-cost variable power supply that can handle a few different voltages, this power supply could be ideal. This might not be the best power supply for you if you frequently change voltages. The Pros: br>br>The Pros: br>br>The Pros: br>b
- Stylish, rather than just another beige bench boxbr>- Budget-friendly, as you only need the voltage and amp rating that you requirebr>- br>Compact and lightbr>- Front-and-center controls for voltage and ampsbr>- Separate coarse and fine adjustments (should make adjustments easy, but not so much in practice, as seen in the negative)br>br>The negative:
- There is a significant delay between the control input and the reading output when lowering the voltage, making adjustments difficult. br>- The fine adjustment knob has hard stops at the minimum and maximum settings, limiting its application. br>- There is no "output" button to turn off the power to the banana plugs while adjusting the voltage. br>- br>br>Comments: The power switch is located in the backbr>br> br>I can't praise the styling enough. In comparison, my old power supply appears to be quite old. The power supply provides precise voltage and current draw readings. br>br> And a power supply's single most important feature is this. Putting power switches on the back of devices is never a good idea in my opinion. I despise having to reach around and aimlessly look for a control. While I prefer the switch to be in the front, given that this is an entry-level model, I understand why. br>br>This device could really use an "output" button to disconnect power from the banana plugs while power adjustments are made. br>br>Because the switch is easy to find, I don't think this is a real issue for this device. br>br> This is a good way to avoid overheating the device you're charging. You must disconnect the leads from your device while making changes because there is no output button. br>br>I also like how the voltage and amp controls are right in front of you, ready to use right away. Changing power settings on my other power supply requires so much pressing of buttons and turning of dials that it feels like you're trying to fly a 747. It would be fantastic if there was a product that could make voltage changes more quickly. The controls, on the other hand, require improvement. br>br> When you lower the voltage, the output voltage adjusts slowly; in fact, you can lower the voltage, then sit back and watch the voltage drop. (The delay does not occur when the voltage is increased. ) The hard stops on the fine adjustment knobs, on the other hand, may be a bigger issue. Before the knob comes to a stop, you can only turn it so far clockwise or counterclockwise. As a result, the fine adjustment knobs are only useful over a narrow range of settings. To hit your target value while making the final adjustment with the fine knob, you must keep the course adjustment within this limited range. br>br>Because of the controls' limitations, I recommend using the procedure outlined below to set your values. br>- - Disconnect your device's power leads. br> - Turn the fine adjustment knob counterclockwise until it comes to a halt.
- Turn the voltage down below your target value with the coarse adjustment knob and wait for it to stabilize. br>- Set the voltage to a value that is slightly lower than your target value using the coarse adjustment knob.
- To get to your final target value, turn the fine adjustment knob to the right (clockwise).
- Connect the power cords to your device once more.

Brooklynn Mathis

| Dec 25, 2021

Update: I had surpassed the 30-year mark. The vendor does not respond to Amazon's return widow, and the vendor does not respond to Amazon. Purchase is not recommended. Original Review: br>br>Original Review: br>br>Original Review: br>br>O Near the end of January, I placed an order for this. 2021 It's been used to charge a number of LiFePO4 batteries. As a result, it's been used at any of the three levels. The current is limited to 9A in both cases, whether the voltage is 6V or 28V. Today, I turned it on at 28V and left it running. The unit appeared to be turned off when I returned, but cycling the power switch had no effect. When I opened the case, I discovered that a thermistor (I believe it was labeled RT1) had burned to ash. There was a pile of ashes at the bottom of the case, right under the two resistor leads that were now exposed. This is unacceptable because 28V at 9A is well below the spec for this power supply (30V @ 10A). This power supply is not something I would recommend.

Aarav Reilly

| Aug 08, 2021

I work on a lot of Arduino projects and frequently need to test a lot of different parts. This allows me to set the proper voltage for the components I'm testing as well as limit the current in the event of a short. br>br>At first, figuring out how to limit the current was a little confusing, but after reading the manual, I figured it out. You must first determine the required voltage. Then you adjust the current knob after connecting the positive and negative clips together (which feels wrong but makes sense because you're shorting it out to create the worst-case load scenario). Disconnect the clips and connect them to your intended load once the current has reached the desired level. Using a scope, I determined that the voltage ripple is within specification. The output voltage matches the display exactly, and it is never more than 1% off when under heavy load. I've never verified the accuracy of the current, but I'll update the review if I do. br>br>There is some movement in the coarse adjustment knobs. The voltage can take up to two seconds to settle when you spin them quickly or abruptly. It's worth keeping in mind. The small knobs make it simple to get the exact number you require. Small bonus. br>br> It appears to be a product from a company that may or may not have a fruit as its logo in white.

Kamilah Heath

| Mar 24, 2021