Decent Low Cost Bench Power Supply • 30v 10a 300w

[@RCVideoReviews]

Near 20:51 I said if I "brought the voltage down it would get us closer to 300w" which is obviously incorrect. I was looking to increase the amperage by turning down the voltage. Without changing the load, the overall wattage would not have changed. These are issues that get removed in production videos that can't be edited in live videos. Sorry for any confusion I might have caused.

[@fajoopsa]

Yep. So much wrong and frustrating info in this video. 🤯

[@daytonagreg8765]

No worries. Its better than my effort

[@lampshadesneeded]

300w into exactly 3 ohm load with the wind blowing the right way and measuring with aliexpress budget meter LOL! for charging batteries its ok but for electronics, the noise generated is intolerable

[@chriswesley594]

I appreciate that your an RC guy, using tour supply to charge batteries, anf I'm sure this unit serves you wll in that rile. But here's a note for the electronics people out there. I just bought this, and tested it. At 10V and 1amp it's ripple is 400mV! That means it's output voltage is fluctuating nearly half a volt at high frequency, and that makes this supply entirely useless for electroncs work.

[@syafiqgoldensand8160]

That is good for trickle charge car battery 😂

[@eclectictech]

Wondering if you have any idea whether your ripple voltage is normal or abnormal for these? Is there a specification on this for this supply? I didn't see one on the 'Abestop' power supply that I was just looking at on Amazon

[@turboslag]

I also bought this exact same unit and have found it to be better than average for build quality, performs to spec and overall value for money. It's not as good as units from high end brands but it would be wrong think that it would be at a tenth or more of the price. Couple of things to note, dull solder joints in modern equipment is normal, reason, lead free solder tends to be dull. It can be shiny, it just depends on the flow solder process settings. I have load tested my unit and it does meet spec. In fact, I've load tested it for about 12 hours at full output and it came out of that with no sign of distress. This was on a Kikusui electronic load. Component wise, the highest quality components will never be found in units at this price level, but for non commercial use the average hobbyist should get an acceptable life from this one, especially if it doesn't see continuous use at high power levels. So I would happily recommend this unit, at the price it's difficult to beat.

[@RCVideoReviews]

Thank you for taking the time to add insightful and fact based commentary. I still use mine almost daily and it has yet to let me down. In fact, at this very moment it's charging two 6s5k batteries at 1c and is doing just fine. I also agree about your comments re: Hobby vs Commercial grade, but if I say that as a KZbinr, I get accused of 'defending'. So I limit my comments there and just try to let the product stand on its own merits. Anyway, glad it's working out for you.

[@Thomas-vj3jg]

What is it called the affiliate links aren’t working

[@raynerstuelgalid]

Thanks for the teaching. In amplifier building, the board needs a +/- rails, say 30DCV. I am looking for a bench adjustable/variable switching PSU to be used for various amplifier boards (that needs different +/- DCV). Question: What kind of description/specification do I look for in a commercial product? Thanks.

[@edic2619]

Really good video. You showed a really good solution for charging a couple batteries at 1 time. I have been charging in par for years. It works fine.

[@RCVideoReviews]

Glad it helped. Thanks for the comment.

[@SomeGuyInSandy]

I've had really good luck with the Korad PS's I bought. 0-30VDC at up to 5 amps. I use one for plating, and the other for electronics projects.

[@InfiniteNesLives]

First random sighting of my favorite pencil in the online wild. I trust your jugement now. Tried to use your affiliate link but unfortunately that alternative overseas brand was twice the cost of an identical meter with alternate branding. Thanks for the detailed dive, purchased a couple just now.

[@Retset]

It does look pretty decent. I use two repurposed £12 Dell server PSUs, rated at 60A at 12V. I use one for my outside charging station. The other, on my bench, feeds my ToolkitRC M7 charger/power supply. If I didn’t have this setup, I would strongly consider the item you reviewed as it’s neater and quieter than my kit!

[@RCVideoReviews]

I fooled around with a power supply like that too and the fan noise made me nuts. I also have a nice bench power supply that can do 50a, but it can only go down to 13v. This one has a very useful range.

[@Retset]

@@RCVideoReviews I did a hack to lower the fan speed but, yes, it’s too noisy to be used much! I mainly use a laptop PSU brick with an XT60 on the end. Only good for about 4A but, combined with my M7, does the bulk of what I need, in silence. If I had none of this, I would definitely get something like your review unit.

[@GST_Racing]

Will this be suitable for breaking in slot ca motors? I need something that will show the increase in amps as the brushes break into the armature. I assume in you have the power supply set to CV the amp meter will show the increase in amps throughout the break in process. Thank you.

[@93556108]

What is the brand name as I couldn't find it at your given links? Thank you.

[@cbiz8]

Hey, what about the Ripple? Can you measure it with an osciloscope? Thanks!

[@tobiasjarpner1036]

I found a similar from Amazon Sweden after your video and I have already used it for some charging of small batteries and connected to a receiver in a plane to get things set up, very good addition to my bench, thank you for the tip! I don't really trust myself to not mix up red and black, so I have a long lead going to a XT60 and then I make the different connectors that I need with short cables and a XT60 at the end, saves a lot of cable and I only need to make sure that the connection is correct when I solder. Making sure I have no more than 5V into my receivers, that is a totally different thing...

[@RCVideoReviews]

On that note, I've forced myself to turn the voltage down to 5v every time I'm done using it to avoid turning on a 5v RX with 32v selected. These devices are incredibly handy on the bench for RC. Can't believe it took me this long to get one.

[@tobiasjarpner1036]

@@RCVideoReviews another great advice. 👍

[@joeishere2789]

I’m planning to use one for vintage phone testing, most of their batteries use 3.7V. Knowing you can change v number by one digit should I use 4V?

[@citok6287]

It has cut off short protection?

[@engjds]

Main problem with these cheap PSU's is the noise, back in the day, even though switching technology existed, brand names still stuck with Linear designs to lower noise at the expense of larger sizes and more expense on bulky transformers, if you want a good power supply for your lab, and do any kind of microelectronics, you are better off getting an old power supply from the likes of Hameg, Fluke/Philips, or even an old RS/Farnell supply, just remember to replace the old electrolytic capacitors as they will have dried up. Those looking at the insides, PCB's these day are usually soldered well, things to look out for is cable management, cut-outs near high voltage sections for arc-over, good smoothing caps and the ilk.

[@RCVideoReviews]

Mine sits on my desk and is silent until I start pushing some current. If it made any ambient noise, it would not survive on my desk.

[@engjds]

@@RCVideoReviews Just to clarify what I meant, electrical noise on the DC outputs, you would need a DSO/Oscilloscope to check that, but typically on other cheap power supplies I have seen it can run into hundreds of mV spikes on the output.

[@RCVideoReviews]

I see. Thanks for the clarification. Yes, definitely not lab grade gear.

[@kenjackson5938]

Thanks for the great video. I am the most basic novice there is to electronics. I am looking to buy a bench top power supply for the average electronics projects out there. I’m asking because if I also, want to test automotive gauges and such, this looks to be the cats….”bum”??

[@Shawn-gt5dh]

Yeah, I bought this one. I'm trying to charge a 210 ah Prismatic cell, and it starts off at like 7 amps. The stay is high for about 5 or 10 minutes and start going down. Then it goes down to 2.2 amps. At slowly keeps going down. Did I get a defective machine or something wrong with the battery?

[@MalinowyWampir]

Measure the voltage at the end of your power leads with the multimeter then adjust the voltage. I'm guessing there is a major voltage drop and it differs from what the power supply is showing

[@tolonaanderson4451]

@@Shawn-gt5dh I this is old but your description is dead on for how the charge process works.

[@VinhLe-yr6gw]

I thought this is in the "electronics " realm, not "electrical" like wiring house lighting, installing AC power sockets etc :)

[@terminsane]

Govt auctions unload beefy power supplies sometimes. Also they are currently dumping commercial DJI drones due to the recent ban

[@mrobertmiller4037]

At the risk of sounding dumb .....What or when do we use the ground terminal for ?

[@RCVideoReviews]

It connects the mains ground. You can connect positive or negative to that terminal if you want the voltage to be positive or negative relative to ground. You can read up on floating power supplies if you want to learn more.

[@patmcbride9853]

Looking at the power supplies on Amazon, I suspect the main board in many units will be identical.

[@StoopKid0896]

I can confirm. I’ve bought two different of these power supply unit from Amazon. The aesthetics of the cases are different but the board and components are laid out exactly the same.

[@K-RODCUSTOMS]

Just watched your video after reading many reviews on Amazon. I'm seriously thinking about buying it. However, I would like to get a current update from you 1st. How has it been holding up so far? Any issues or concerns I should be aware of? Your help is appreciated!

[@RCVideoReviews]

Still on my desk. Still use it regularly. The o love you use I have is the calibration is off a few hundredths from my Fluke 87V. Hasn’t given me a single problem.

[@K-RODCUSTOMS]

Good to know. Thx

[@wimukthihashan5]

Best review i have ever seen you earn one more subscribe

[@RCVideoReviews]

Thanks!

[@user-rs8zg8ey2b]

USB at 4.3v is not fine, way out of spec. :)

[@R.B_B]

Why?

[@user-rs8zg8ey2b]

@@R.B_B well, it's out of spec,,, doh!

[@R.B_B]

@@user-rs8zg8ey2b what is the spec?

[@denim47gaming]

Its from 4.4 i think to 5.4 or maybe 5.5 5.6

[@tomaskey6844]

I just got this power supply and it is quite adequate for my use. Using it now to get my Blade CX2 back in the air after sitting in a box for many years. Thanks for saving me opening my case.

[@p__jay]

i've bought that power suply...now if i set it to constant voltage @ 12V and connect a motor, it switches by itself to C.C. and draws whatever it wants....WHY? is it broken or the way it is? if so its completly useless...

[@standishgeezer]

Adjust the current limit upwards. From the factory, it may be set to a low current limit such as 200 milliamps.

[@user-rs8zg8ey2b]

Ripple is best on a scope, but just set your meter to AC volts and read no load and loaded.

[@KE8ODY-WV-Ares-Ham-Dad-3O4]

Would this power a ham radio

[@RCVideoReviews]

300w 10a 30v.

[@tastenheber]

The device looks good and seems to be of a decent quality. I'm using something similar. Although, for very low voltages, I prefer to use one of those "DPS" power supplies from RuiDeng. My only real point of criticism would be the USB port at 4.3 V at only 0.7 A load is really bad, to be honest. iPads can draw over 2 A from a USB charger and I don't even want to know how low the voltage would drop then. Just compare with the Apple charger, which should stay at 5.1 V even at 2 A current draw. I'm using a simple multi-port USB power brick on my bench, they don't take a lot of space when powered with a separate mains power lead and can stay powered permanently. Also these bench power supplies are usually not made for permanent operation. It may not be very efficient as power supply for chargers. To power chargers, cheap and used server power supplies are ideal. I'm using a 1kW HP for 12 V and two in series for 24 V. Of course, I'm not nearly using that much power, but at the power I'm usually drawing, the fans won't even turn on. And I still have my bench power supply read for use.

[@RCVideoReviews]

I think I want to see about measuring voltage on USB with a different meter. Haven't really sorted out a way to check calibration with these things yet.

[@craigstrbo]

Hello, don't know much about electronics. Want to purchase a bench power supply. I see many choices from 30V 3 amp to 120V 3 amp ones for sale. Why wouldn't I buy the one with the most accessible Volts? I will be using it to check Kobalt 80V 6 amp batteries. What would anyone suggest? Thanks for your time.

[@misterbonzoid5623]

Sounds like you need a PSU that can deliver higher voltage and current than those batteries.

[@engjds]

PS: Anyone thinking of buying a meter, and you use it a lot, there is only one choice: Fluke 87V, treat yourself to the industry standard, it will last a lifetime. You should at least get one with True-RMS for accuracy like the 87V.

[@RCVideoReviews]

I just got an 87V a few weeks ago. :)

[@engjds]

@@RCVideoReviews Good buy, when I first started electronics I was told by my lecturer to get a 87, they are pretty bullet proof, had others like Agilent but they are not as solid, they try and be too fancy with features at the expense of build quality.

[@edic2619]

Thanks for sharing.

[@RCVideoReviews]

Thanks for watching!

[@michaelhawthorne8696]

Anybody who derides a Fluke is not worth listening to. By the way, your PSU is SMPS (Switch Mode Power Supply) and not a Linear. SMPS is great for the weight of the PSU and can produce insane current values. If you are powering sensitive equipment or Audio related circuits....then a Linear will be needed. These will be bigger and weigh a lot more.....

[@İlhanÖzbay-u2v]

10 amper 30v waat göstergeli sivic mod hafiftir bence çok iyi

[@snoopy_fpv119]

4.3 V at the USB port is quite little

[@RCVideoReviews]

It charged everything I plugged in, so it appears to be good enough.

[@bossnimbus]

Whir is cooling fan

[@666Husky]

I have this and it broke down after 3 months.

[@RCVideoReviews]

I posted this video May 9, 2023. It's August 12th 2024, and I still use it almost every day. It's been on for 1.25 years straight usually running around 30v and when I use it as a charger usually between 5-10amps. I would buy this unit again immediately if it failed at this point.

[@umbrela_Corp]

10 amp not enough imo

[@RCVideoReviews]

Of course your needs may vary. 10a is more than sufficient in my use case.

[@whatevernamegoeshere3644]

I do opamp circuts lol. 10 amps mean house fire in my sub-watt circuits. If you are looking for higher power ratings often then you should buy something like agilent instead of aliexpress specials because these have a history of sometimes popping in nasty ways if you run them for longer periods

[@sparky8006]

Can I use one of these devices to fix electric scooter battery at only putting out a few volts need it back to 30 volts

[@RCVideoReviews]

I don't know about 'fixing' a battery, but it could be used to charge one.

[@sparky8006]

@@RCVideoReviews can it increase battery voltage?

[@RCVideoReviews]

It follows the rules of voltage potential. So long as the destination voltage is lower than the source voltage it can. I'd recommend using a charger though.