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)

Works great
Great budget power supply! I use it to test control boards for power equipment frequently, I’ve tested with a multimeter and seems to be accurate to the best of my measurement ability with a reasonably good multimeter.

Works great, but clips could be better.
So far, my experience with this has been good; it’s easy to use and feels solid. The unit was lighter than I was expecting and fits well on my workbench. Nice addition to my setup. My only complaint is that the alligator clips are cheap and hard to open with the rubber sleeve on. The sleeve makes it nearly impossible to get the friction you need to open the clips, and once you do, it’s too easy for a finger to twist and bend the clip (like my negative clip did on its first use) Do your self a favor and buy some better test leads for this and you’ll be happy! Additionally, the USB is separate from the output voltage and is not controlled by voltage or amp adjustments. Also, the USB-C is PD QC, so if you are trying to use the USB-C on a device that does not support it, you get nothing.

Works well for the price
Works well enough. It’s exactly what you would expect from a basic power supply at this price. Relatively accurate current and voltage setting and I appreciate that it shows you watts instead of having to calculate yourself. I ran the 30V 10A unit overnight at the full 10A output and it did it with no problems.Minor Complaints:The beep sound is a bit loud, but I think it’s a piezo buzzer and you can probably just open up the unit and put something over the hole on the buzzer to lower the volume. Also there isn’t an enable/disable output button and instead you have to turn the whole unit on and off which involves it booting up (takes about 3 seconds) and making a loud beep sound. Many load conditions will cause the switch mode supply inside to create audible noise.Overall I’m pretty happy with the product since it powers circuits perfectly fine with no issues and that was all I really needed.

Stay far away from this power supply.
I needed to fix something at the office, so I ordered this inexpensive power supply. Something told me to check it out at home before I brought it into the office. When I first turned it on, I was able to vary the voltage, but when I put any kind of load on it, it tripped the circuit breaker. I tried this a few times from different outlets and it did the same thing. I have a device that is a resettable fuse so I connected the power supply to that so that I wouldn’t have to reset the circuit breaker each time and determine what was going on, but the power supply shorted the 120 VAC so fast it tripped the circuit breaker through the resettable fuse, which I’ve never seen before. Clearly, this power supply was defective and in fact, dangerous. I contacted Amazon and they arranged to have another one sent a few days later and guess what? It did the exact same thing. I then ordered a little bit more expensive power supply from another company, and that worked as expected. The moral of the story, don’t even think about buying this power supply.

Prend peu de place, facile d’utilisation.

I recently ordered this DC bench power supply (30 volts, 5 amps) and have put it through some testing. Overall, it performs well, but I did notice a few flaws in the circuit design that are worth mentioning.First, the capacitors used in the unit are very cheap Chengx brand capacitors, which don’t give much confidence for long-term durability. Additionally, using my thermal camera, I observed that three resistors become extremely hot during operation. One is marked 101 (100Ω), and the other two are labeled 152 (1.5kΩ). I believe these two are bleeder resistors for the DC voltage, as they’re connected across the capacitors. The higher I set the voltage, the hotter they become. At the power supply’s highest voltage setting of 31 volts, these resistors reached temperatures of up to 110°C. Ideally, the manufacturer should have used higher wattage resistors or increased their values to reduce the heat buildup. However, increasing the resistor values would slow down the voltage drop when adjusting the voltage down.The fan in this unit is quite loud when it kicks in, but at lower wattages, it rarely turns on, which helps to keep the noise levels down during lighter use.In terms of performance, I conducted a load test and managed to draw a maximum of 146.9 watts (29.68 volts at 4.951 amps) before the constant current mode kicked in. This was the highest wattage I could get from the supply.I also checked the accuracy of the voltage output using my best multimeter. The voltage was very precise, generally reading only between -0.02 to +0.06 volts off from the set value. For instance, if I set the power supply to exactly 30 volts, my multimeter would display 30.06 volts, which is excellent accuracy.Regarding the USB-C port, I tested it and found that while it does support 12 volts, it only seems to handle 1 amp. When I connected it to my battery bank, it would only charge at 1 amp, and the voltage dropped to 11.4 volts. I didn’t extensively test the USB-A port, but I did connect a LED ring light to it, and it worked without issues.I also tested the voltage ripple under a 100-watt load using my oscilloscope. While I’m still relatively new to oscilloscopes and mine is a budget model, the ripple didn’t seem too bad overall.In conclusion, I think this power supply is a good deal, especially for its price. It performs well for most applications, though the hot resistors, cheaper capacitors, loud fan, and limited USB-C charging capability may be concerns if you’re planning on using it for extended periods or under heavy loads.