Testing An Amazon 12v Power Supply! 

If you are interested in getting your own, this is the model I bought: amzn.to/33b9dgs

I've got 6 of these in series to make a 72V e-bike battery charger and they pull the full 30A each for about an hour and they have done so 2-3 times a week for 3 years!

I think this power supply is rated for 30A, and it should produce that continuously. Your tests didn't come near that limit, so it's understandable that the mosfets didn't even get hot.

I use these exact same power supplies, the brand I found like is Menzo, or something like that. They cost like $18 with 2 day free shipping. I even had lightning hit one of these and it still works, I had to replace the fan, but so what! I also use 14 gauge power cable instead of the 18 gauge power cable you have there on your power supply. Cheers!

Thanks. I was going to buy something like this that looks exactly the same as yours. I was wondering if it was really capable of 30a. You convince me.

Great Video. Thanks for sharing your tests with us. I am a Christmas LED show enthusiast and I have used this type of power supplies for years. There is one thing that is haunting in the LED show world, and this is using two different power supplies to power inject one long string of LEDs. I've doing this with no issues, but people say this is a big no, no because it could cause one or both of the power supplies to catch fire. It will be amazing if you can share with us your thoughts and maybe do a video on it. Basically the LED strip will have a power supply providing power on one side and other providing power at the end of the string (maybe 300 pixels). This will setup will have two positives and two negatives from two different power supply connected. Thanks in advance for your time.

Nice video. I liked the screen on screen scope work!

Hook a power inverter up to it. You can draw large current for indefinite time without burning your bench.

The ripple is cause DC only uses negative polarity that is straight wave, while AC uses positive and negative polarity causing curved waves. Look into how rectifier diodes create DC current in a electronic book.

Excuse me can you please answer me why you put 12.08 voltage on power supply instead of 12? By this time probably you have already put this leds in your office do they work properly? Thank you and keep up the good work

I'm about to install a Chinese diesel heater and the power side of it needs 12v , I purchased a desktop Power Supply that puts out 13.8 v . Would this power supply damage the heater ? Thanks

Can I use this power supply for power car amplifier which has two 25a fuses ???

These are very cheap switching supplies, cheap design of a forward converter. Mine is a 30 Amp unit, spec is said to be at full load 150mV ripple which is a lot. But this unit will work with most home applications. I've operated this unit at 30 Amps and voltage adjusted to 13.8 vdc and ran for one hour at full load. And it survived.

Hey bro so i bought this very power supply IMAYCC AC to DC Converter 12V SMPS,110V to 12V DC Converter,12 Volt Power Supply Max 600W 50A DC Power Converter with on/off switch to power my 12v car kicker 12in L5 subwoofers paired with a Rockford Fosgate Punch P4004 4 channel Amplifier (400 watts rms) mated to my home theater system via line out, so everything works good the power supply works amazing, and the subwoofers sound amazing in the studio here, but one thing thatbis annoying is that the fan in the power supply is screaming even if the amp and subwoofers are not playing…. Even under light load or no power load, the fans emit a certain tune and it drives me crazy, how can i add a fan controller to this set up, the power supply is rated for 600 watts and the amp is 400 watts much love, i need this to be quiet please help on a side note I even if i use the amp and the woofers for hours and hours on end the amp and power are cool to the touch… so the fan is bugging out…

You must have a frying pan or something to put them on. Be the best option if you don't have anything.

Good video but I would like to know when does the fan comes on do it work

It's charge 12v 88a battery

Couldn’t you just use capacitors to smooth the voltage?

Should these be covered in a protective box? Or can they be screwed straight on to a wall?

You said you have two 1 ohm resistors to pull 12 amps but your video only showed one 1 ohm resistor. Am I missing something?

Did the fan ever come on?

Will this run a car radiator fan? I want to make an exhaust fan for my home garage but not sure how to power it.

That AC measurement is definitely a ghost voltage, it's not really there. I wouldn't trust multimeters that don't do true RMS conversion, and which don't have a low-Z measurement function. If you looked at the 12V on a scope, I highly doubt there would be 4 volts of ripple, that would be verging on unusable, even if it disappears under some load.

Is DROK a reputable company for power supplies (and is their Amazon store reliable)? I want to get their 24V/20A variable power supply for a personal project. Thanks.

Can i use this power supply to run a 12v 120w vacuum cleaner?

a fan blowing on the resistors would help them and a second meter reading the amps?

Thanks, now I'm absolutely sure that load resistors would be an absolutely stupid solution to generate (intentional) load on a power supply. ;)

Can you please add the link for purchase ?

hi man low on money so can you do an emf test on a power Supply and/or cannabis grow light

what is the name of the resisters

With a 12VDC / 10A DC power supply, if you cut off the DC plug and expose the bare wires, would you get a major ZAP/JOLT when you touched those bare wires? How about on your 12VDC / 30A DC power supply? I am just trying to fully comprehend how different AMPERAGE in these DC supply units impacts getting a ZAP/JOLT from their bare wires. MANY THANKS!

Is that an RMS meter?

never buy this supply its rubbish