DC Power Supply Adjustable Variable 3Digital LED Display Adjustable Regulated Switching Lab Bench Power Supply Digital (60V 5A)

I really like the single voltage knob. It's a multiturn pot, so although you can't go from zero to full in one flick, it's much less fussy and touchy than working with coarse and fine knobs. I measured the noise output, and it's actually quite good, close to the rated spec. Also there is not really any overshoot at power-on. The problems that people have noted all relate to the fact that they are testing it with AC powered oscilloscopes, and introducing ground loops. In that case, yes, you will see noise and a turn-on spike. A common-mode inductor added to the DC output of the power supply can get rid of that issue. I just used the entire input filter board out of an old microwave oven. Didn't use the ground terminal of the filter, just the line and neutral. Note that this filter was filtering the AC input of the microwave, but I use it on the DC output of the power supply. I might even mount it inside the power supply. I know what I am doing, not recommending you try it, OK?

Bought this for electrical projects, but also to charge a 52v 14S battery pack to 57V.The volts are about 0.5V greater than my dmm reads which is close enough.The trick for battery charging is to set the voltage with no load, and twist the amp knob as low as it will go to give you the desired voltage.Then make your connections (with power off to avoid sparking) to the battery, and dial up to desired amps.Should be in CC mode, for constant current until it reaches your desired voltage; then current will drop to zero, and it will switch to CV mode when the battery reaches the desired charge level.The fan is on a thermal switch, and tends to cycle under high load (e.g. 57v and >=3 amps).Haven't pushed it to the limit, but think it can handle what I intend to throw at it.

I ordered one of these from AMZ Warehouse and it came in DOA. However I did note a couple of items that have not been mention in previous reviews. The case is metal, steel actually, except for the front cover that is plastic. The voltage control is a ten turn potentiometer. The current control is a single turn potentiometer. The circuit board is mounted diagonally across the case. The case was obviously not designed for this diagonal installation and has the proper hole in the bottom for the board to be mounted parallel with the sides of the case. However the board could then interfere with some of the controls on the front (right side). So they used one of the cooling slots as an 'alternate' mounting hole. The 'safety ground' is wired directly to rear mounting screw of the circuit board thus grounding both the case and the board. The center front Banana plug is wired directly to the front mounting screw of the circuit board.Nice little supply. It is a shame that it did not work. Guess I will have to spend more money to get one that does.

Like many others, I've got many lithium and NIMH batteries that are below the charging threshold for their default chargers. Yes you can try to use another battery to jump start the dead one but you won't be able to monitor the energy transfer and you run the risk of killing your good battery. This "universal" power supply solves that and it much easier to use than I thought. Of course, go slow and dont overcharge and risk an exploding battery. It's working for me so far and now I've got a boat load of batteries to revive. Happy charging.

I wasn't worried much about ripple, transients, or anything else. I just needed a little DC supply and this supply was just what I needed and at a reasonable price.Please note that this should be considered a 150 watt supply with a 10% headroom (165 watts total). At 60V, I was able to pull 2.75 amps, or 165 watts. With the output shorted I could get 5.1 amps. This sort of behavior (a constant max power output) is typical and does not indicate a defect of any sort. Just be aware that you don't get 60V and 5A at the same time. You can keep the full 5 amps out to about 30V, but I didn't test that.

I used this power supply to charge a 52V lithium-ion battery pack. I ran it for hours at close to maximum power (48 to 53V at 5A). The fan is temperature controlled and only comes on as needed, which, in my case, was periodically for 5 out of 30 seconds or so (I'm guessing). The exterior of the power supply did not warm up at all.My initial impression is very good, it's very light, the voltage readings match closely what my multi-meter is saying, it uses a multi-turn potentiometer which makes it easy to select the right voltage. No complaints so far

I did not have any AC on the output as the one reviewer mentioned. Seeing as this is a switching power supply, I’m guessing they got a faulty unit.I’m very happy with the quality of this unit- well built, feels sturdy and the meters were right on to my Fluke. The knobs are smooth and the switches feel quality. The floating ground is a nice option to have for splitting output, especially for something like an op amp circuit- I didn’t see that feature in any other units at this price point.

This is a great unit if you need to stock up on more than one supply for testing new boards with reasonable current limits. We have 5 of these units in 30V/10A and 60V/5A versions. We have not tested display accuracy or very tiny current or voltage levels. For this price point is the expectation they operate for over a year and reasonable regulate current and voltage when connected to new test articles. For more accurate jobs we'd buy more precise equipment.

I needed this for so many years, cables are thick and strong, but easy to open and use

本来300W 定格のスイッチングレギュレーターで連続使用する限界は150W程度と考えるべきでしょうから（日本製でもこの程度が普通）、60V 2.5A が連続使用時の最大と考えるべきでしょう。38V 1Aで丸1日稼働させてみましたが、発熱も大きくなく安定度も問題ありません。45V 2.5Aでも1時間程度なら問題ないことを確認しています。　問題点としては電圧・電流コントロールを最小にした際、保護回路がはたらくためか全く出力が出なくなることがありましたが、しばらくおいて再度スイッチを入れたところ問題なく使えるようになりました。たぶんポリスイッチの保護回路がはたらいたのだろうと考えています。（中をのぞいていないので本当かどうかわかりませんが）　5A以上の電流で回路を試験することは、弱電系ではあまり考えられない一方、LEDを直列使用した時など30V以上の電源が必要となることが希にあります。別に30V10Aの電源を持っていますが、60V電源の使用頻度の方が高い今日この頃です。　300Wのスイッチングレギュレータだと電圧固定のものでも5000円程度はします。また、これらの電源には箱（筐体）がついていませんので、100Vが露出したまま実験することになります。これらのことを総合的に考えるならコストパフォーマンスの良い商品だと思います。少なくとも私にとって実験電源としてほぼ十分な性能を持っています。　購入後1ヶ月経過していませんので、長期的な安定度はまだ不明です。

54.6v3Aで使用していたところ買って1ヶ月も経たないうちにサーミスタが燃えてしまいました。