DC Variable Bench Power Supply with Encoder Knob, Output Enable/Disable, USB Quick-Charge, Short Circuit Alarm (60V 5A Black)

This variable DC power supply is exactly what I needed. It’s well-built, compact, and easy to use. The size is perfect for my workspace, and the performance is very consistent. It provides stable output and is reliable for all kinds of electronics work. Definitely a great tool for anyone working with circuits or needing adjustable voltage. Highly recommended!

A nice power supply for the price. I did some limited testing upon receipt of the power supply, and it performed well. The adjustments are intuitive and easy to make. The displayed values matched test equipment indications, within normal tolerances. Since this is a relatively new purchase, I can make no conclusions about its durability. However, it has performed well so far.

Just got it, so take that into consideration when reading this review. However, after opening, powering it on, and spending an hour putting it through some initial testing I am VERY happy with this purchase with the exception of one itty-bitty issue (see last paragraph).Obviously time will tell, but it looks and feels like a quality unit. I purchased the 30v-10a unit and after measuring with a good multimeter, the NANKADF accuracy is dead-on below 15 volts and within .005 volts at higher voltages. That's more accurate output than a wall-wart and most PCB power supplies (7805, etc). The encoder knobs are wonderful and let you dial in the voltage/current level you desire easily and error free.I did not find the audible "beep" when turning/pressing knobs to be either loud or annoying as others have suggested in their reviews, however you can disable this although I found the included instructions a bit confusing.1) Press the output button continually until the unit goes into setting mode.2) Press the VOLTAGE button until the AMP number shows "4".3) Turn the VOLTAGE button until the WATT number shows "0".4) Press the VOLTAGE button until the AMP number shows "6".5) Press the VOLTAGE button once more to save the settings and return to operational mode.My only complaint is that after selecting and setting the 4th digit for both the Voltage and Amp displays, the unit automatically defaults to the 3rd digit for subsequent adjustments when it should remain selected on the 4th digit. For example, if I want 25.64 volt output, I select and set the first digit to "2", select and set the second digit to "5", select and set the third digit to "6", select and set the fourth digit to "4". My next turn of the Voltage knob should either increase or decrease the "4" in the fourth digit because that was the last digit I selected. However after a 5 second delay, turning the knob changes the value of the "6" in the third digit and so I have to press the knob moving through the display to get back to the fourth digit to adjust it again. While I don't anticipate spending a lot of time adjusting tens of mV, it is nonetheless a little aggravating.

The good design is only let down by the binding post. The controls are simple and easy to understand. Checking the output with a meter and test load shows the display to be accurate. The kit included some basic cables with spade connectors instead of banana jacks. It is not a show-stopper but something to note. The binding posts are basic and a little thin. They are only marked at the base instead of with matching color caps. Replacing them is not an issue with all the connections inside being screwed or bolted rather than soldered. The front and back panels are plastic making it less likely to short things out if you bump an output against the front of the unit. The separate output on/off switch is a nice touch and allows you to turn off loads without turning off the power supply. I would like to see fuses on the outputs as a second level of safety but at this price point, I can't fault them and there is enough room inside the chassis to add them yourself.

I need a second low-voltage supply at our ranch for use in bench testing electronics at typical electronics supply voltages levels, sort of 1.5 volts to 18 volts. In particular I wanted to use it to test a rain gauge with LCD display designed to work off of two AA batteries...sort of 3.5 volts down to 2 volts. I wanted to measure the discharge current drawn by the rain-gauge electronics as a function of voltage as the battery discharged, and describe the LCD display brightness and contrast as a function of voltage level. With my other low-voltage bench supply, dialing in a particular voltage in a real hit or miss operation. The course knob always overshoots, then I find that my desired reading is out of range of the fine knob...so I go back and forth several times to get the reading I'm after. The unit was a dream. You just set the knob to control the digit you want to control and it just steps precisely for each click of the knob. In my case I wanted to test in 0.1 volt increments starting at 3.5 volts and dialing slowly down to 2.0 volts. I just set the voltage at 3.5 volts and the knob for 0.1 volt increments. Each click dropped the voltage exactly 0.1000 volts. Infinitely better that my other power supply.The second thing I like about this supply is the second on-off switch on the output...separate from the power on-off for the unit. Another. 50-year-old very-low voltage supply I have has this feature and I use it all the time. With this feature one can set the voltage and current level while the test unit is plugged in and also turn the test voltages on and off without going thru the transients of turning on-off the power supply. Very helpful.I checked the voltages and current w.r.t. my digital multi meter and the agreement was good. However, don't expect it to accurately measure currents of just a few milliamps. For that I used my digital multimeter.Highly recommended!

This is a very useful voltage regulator with adjustable amperage. I used this to recharge my batteries and other projects. When your battery is dead, you will need to bring it up to a certain voltage to get it recharged again.