Small Bench DC Power Supplies - Review and How To (Constant Current vs. Constant Voltage) 

At last someone who gives clear detailed instructions on how to use a PSU. Ive watched loads of videos but your is by far the best for a total female beginner. THANKYOU

Thank you for not having a 12 minute intro.

The Kungber on the right is the exact model I just bought! The instruction manual looks like Google translate was drunk, so I appreciate the info.

For the last few hours, I've been trying to bring myself up to speed on using my entry level benchtop power supply. Your video is the clearest and straight forward so far. Thank you very much.

Very helpful video! This is really what people will need if it's the first time they bought themselves a bench power supply

Thanks man! I got myself a power supply about a year ago similiar to the one on the right except mine's Evetek and it doesn't show wattage, but to this day I had been rocking my brain in figuring out how to display the change in current output on the machine, so I gave up on it supplying current and just focused on voltage. Appreciate the help!

Thank you so much for this video!! I just bought a cheap power supply and i was just getting ready to send it back because i didn't think it was working. You explained everything so well!! I have been watching videos for the past hour and they all had me confused. Your video got me back on track. Thx again!! Take care!! Aaron

loved this video, perfect explanation. not too much fluff and an easy way to understand. Thanks man!

I saw videos regarding this power supply. I must say that this is one the BEST video and awesome explanation. Thanks a lot. 💐

Thank you for a great explanation on setting the power supply up to read voltage and current.

Very good tutorial! I cracked up when you perfectly placed the ad segue when the camera mount moved. I like your videos!

Super helpful. I recently acquired a real "Shenzhen Special" with terrible operating instructions. This was so much clearer!

Thank you. I learned something today. Now I can use my power supply correctly.

This is what I spent all day looking for. Thank you and nice job

This was super helpful, thanks!

Excellent, I never knew that I could set my power supply like this until I watched your video - thank you!

Just bought one to charge my headway lithium bank for my car audio system and this is a great explanation! 👏👏👏

Amazing, thank you. As someone that knows nothing about this, this made it very easy to understand.

Very nice tutorial. I have been using the Longwei identical to the one you were demonstrating for some time, but this video actually taught me some things I did not know about the unit. Thank you.

I had challenge setting the current, thanks for the current adjusting explaination

Thank you. Recently got a similar power supply and really had no idea how to use it, so this helped tremendously! Thank you!!

Thanks, you have a easy way of explaining things and this helped me understand how to set the CC mode.

Clear explanation with good examples, great video.

Super helpful video for me to learn how to use a bench power Supply that is new to me.

Finally! An explanation on CC/CV power supplies that I can understand. Thanks

Thank you so much; I have a power supply and this was no where in the whole instructions and it is made by a diff manufacturer… and this works thanks thank u

Thanks, great explanation of the constant voltage/current issue as well.

Thanks for sharing your experience and thoughts. I am currently researching bench top power supplies. Appreciate you explaining these details and differences. Helpful video Update: Just ordered a Longwei 3010D with course & fine adjustments from Amazon 2 day delivery 😎😄

Your video is very helpful and easily understood. Thank you.

Very good tutorial, exactly what i was looking for.

Helpful immensely. I also read your safety message in comments too that is excellent too. Cheers hey!

Thanks for making this video. Very helpful.

Great video. Answered all my questions.👍🏼👍🏼

Thank you so much for the concise and bs free explanation!

Thanks for the video. I just recently purchased the Longwei that you have. I was mostly conserned that I might damage it by miss using it. Thanks again for a clear explanation on the proper use.

Thank you so much. Now i understand it alot better. And how you explain it is 100% spot on.

This cleared up a lot for me. Thanks!

Thanks very much for this. Very helpful. Never new this at all! 👍

Thank you for video, my bench psu didn’t have detailed manual, this helped

Great explanation, thanks for this video!

Great video for me to learn. Thanks !!

I started researching how to use these because I thought the one I bought was broken! At 3:00 you answered my question! Don’t forget the rubber gloves! 🤣

10/10 recovery on the camera drop.

I'm with sreetips on this one man. Great job. thank you.

Great explanation! I just bought a similar unit but 32V/6A that have the useful output on/off button.

Best instructions video of all

Very helpful video. Thanks 👍

Very good video my man. Best one out there!

Great video mate , well explained 👍🇬🇧

Very well explained for this newby 👍

Excellent, thanks for sharing!

Thank you for clearing this up for me. It was a complete mistory until I watched your video.

Excellent video - thank you!

Great video, great explanation Thanks for this

That was incredibley helpful, thank you

Thanks for this. I just bought the Kungber 30V 10A unit which I like. This said the instructions that come with the unit are okay, but only okay. I really needed to see someone step through the basic possible configurations of the device, with constant current and constant voltage, and the automatic cross over between the two, in order to understand how the controls work and what the displays mean. The Kungber seems like a well made, basic tool. The wattage display is a nice bonus.

Thanks for the video, awesome!

Yes that was very helpful. Thanks I appreciate the advice

i bought a power supply because i plan on doing some electroplating, and this is the best ive seen so far I know this video is 2 years old and you've probably since moved on or perhaps have already done so but a best practices and safety video would be nice for those of us who are a bit gunshy

Well explained! Thank you.

This is so helpfull dude.. i set mine to CV.. set my settings, connect it to my battery and it would go to CC. But thats normal.. lol. Thanks bro!

I like the ad break right when you drop your camera. Very suspenseful.

Thank you for the Great Video.

Nice video. A couple of features to look for that don't necessarily add a lot to the price are a lock button that locks your adjustments so you can't accidentally change your settings and a separate power switch to allow you power on/off to the leads after you've adjusted your settings without turning off the main power.

You definitely explained how to set up the Kunberg better than the instructions did. Wish I had watched your video first.

Your audio quality is very good

Thank you very much for a nice video👍

Well explained. Thanks.

Great video thanks !

Thanks for this man!!!!!!!

Great video thanks for sharing, it’s possible the kungber has residual charge in it capacitor/s and takes time to power down, be interesting to switch it off under load and see if it powers down faster. Thanks again for a very informative upload.👍🏽

New subscriber trying to learn as much as I can before my Lithium iron cells arrive. You explained this perfectly not everyone watching understands what each piece of hardware being used is for.

Useful. Thanks!

very helpful. thanks!

Thanks for sharing

clear as a day

I have a unit similar to the one on the right. "Nice" is the brand on it. One of the many sellers warns you to ONLY adjust the current limit (by shorting the leads) when the voltage is set to 5 volts or less! That isn't mentioned anywhere in the manual that came with the unit.

Perfect tutorial.

Excellent. Thanks.

thanks for the lesson

If you want precise outputs of voltage & current use the power supply in tandem with digital multimeters & adjust voltage & current to your requirements. You can buy two DMM for $50 & now you have better metering for you bench power supply.

It has been quite a few decades since I diddled with electronics, at least in "bench mode." I've just gotten this new Kungber and am still trying to muster the courage to actually connect it to my breadboard circuit. It is just ~so~ counter-intuitive to me to see my selected voltage in the display and SHORT THE OUTPUT! But I'm doing it...ever so gingerly. I think I am going to pretend for a while that the current controls just do not exist (like in my old-timer experience). I really do not like to work with power without feeling absolutely in control, without everything being completely intuitive. OK, I'll set the current, but only change it with great deliberation. I guess I feel like I have to, because I don't see the easily accessible fuse on the front panel, which used to put the brakes on my current. And, of course, I can see that this is really so much better, because a one-amp fuse my have limited the fire hazard in the past but didn't do much for protecting the low-power ICs and other components that we mostly work with now. (If I had been on the design team for this product, I would have insisted on a button that said "Adjust Current" and shorted the output internally without me doing such a wretched thing myself. IMO, kinda bad to initiate total newbies into any kind of electrical work without supporting their wise instinct not to connect + straight to -.)

Awesome video.. Is there a way to 'lock-in' your settings in case you accidentally bump the dial it doesn't unknowingly change anything?

Amazing!

i have one that has a special knob instead of a potentiometer style thing, and when you press on it, you can change which digit you want to change, so it works as a coarse and a fine knob at the same time.

Very helpful

Awsome vidéo, just a question, in a power outage or losing power for a few minute wich happen all the time where I m from, will this unit will go back to is pre set setting?

I am sure you save my new batteries I would have never guessed that could happen

This was probably the best explanation I’ve seen so far on bench power supplies. I’m about to start top balancing my new 280ah cells. Still a little confused on whether these units eventually shut off when they reach the max cell voltage. 3.65. Or if you need to monitor it.

Great video. The earth terminal. Are both power supplies isolated from earth . If you wish to get a positive and negative voltage can you connect the positive of one supply with the negative of the other

THANK YOU

Your black psu do turn off instantly, but it takes a while to discharge the output capacitors. If you connect a load and turn it off you will see that it shuts down almost instantly...

thank you for that, my PSU sparks when I connect the leads at any voltage above zero to adjust the Constant Current, could it be that on some units you need to do that with the dials turned down to zero only

thank you

very good

Note and an assumption on my end. As far as the black one staying on longer and the white shutting off instantly my guess would be that they both are shutting off slowly the white just cuts off the display. Would both have caps they need to drain?

Do you think one is more accurate than the other? I need to buy one soon. Very well explained. I watched a couple other videos before yours and still had no idea how to adjust it. All I need it for is to parallel top balance 8 LiFePO4 280 ah cells.

Hi, was wondering if you could help. On my tire lathe I have a 1/10 th scale remote car dc motor and I have the kungber power supply from this video. When using it the motor is easy to stall and makes it unuseable because of this. I confirmed with a battery for a temp power supply and the motor wont stall when using the battery. Its like as soon as I load the motor up it stall with the kungber. Any ideas? What am i doing wrong or is it a bum unit or am I a bum unit lol. Thanks

Good morning, can this Longwwei power source be used to identify short circuits? (it turns off or does not turn off due to a short circuit in a Laptop Board), I need it to continue supplying current to heat the components that are shorted to easily identify the component to change.

hi sir. I just want to ask a question. will this type of power supply get damage if you always short using 5A setting in a long run. I plan it to use in studying laptop motherboard repair in finding shorted parts.