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)

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.

We already had power supplies at work, but they were big and bulky. One of my coworkers had this and after trying it out I had to get one for myself! It's so compact and lightweight. Makes it so easy to use anywhere in the lab. Good voltage and current range too. I turned the beeping off because it was too loud. The built in over current protection is very helpful. You just have one dial, but switching between voltages is still very fast. I mainly switched between 3.3V and 24V. Output is stable and accurate. No smells, and looks great. My favorite power supply.

Good little power supply. I was doing some anodizing of titanium and it worked perfectly for the voltages I needed. Very lightweight from what I am used to. I like the fact you can turn the output off without powering off the unit or turning the voltage all the way down. Nice to be able to change the voltage increments by pushing the knob in to advance to the next decimal position. Good purchase.

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.

This product works as expected. I have used this power supply several times now & haven't had any problems with it yet..

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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!