great video, need more ultra informative, full of facts, and straight science videos like this

Great video and fantastic illustration and explanations thank you! Question: Is it usually specified on the back of a power adapter whether it is unregulated or regulated? Is there some symbol that tells the difference between these two or would it just be spelled out?

Thank you for the excellent explanation.

Great video. Super useful!

Thank You. I can't explain how much I appreciate this info.

I have the same amp and adapter that i got today in the mail and the adapter makes a high pitched whining sound, the sound also (very faintly) comes out of my speakers and gets louder as the volume knob is turned up. Is this a problem with the amp or the adapter? Also is it possible to have you guys send me a new adapter instead of returning the whole thing? I just returned the oneu amp i had before because it stopped working properly after a month and i really dont want to go through the whole process again.

Thank you! I had to order a replacement power cord for my hdmi box behind the tv from the manufacturer. He sent me one that totally has too large a tip! I was looking for info about tips, what they are called, how to measure ,etc... Your video gave me all this and more! I always like to learn something new, I did today! I just need to know if I can attach a tip converter to my other tip. Or, how I need to do this. I do not think the manufacturer has a power plug for me unless he will raid another units. Linda

and so if the the C is facing the + facing left or right it is the same polarity.??

so what's the difference in the black and yellow pin??

great video! Nice explanation!

is it true that the lepai 2020 works best with a 12v 5a power supply? is there a big difference in sound?

how does one measure that pin i dont see the information showing that on the lables

very educational. thank u

What size is the adapter

How do you figure out what to use if the device you're trying to plug into doesn't tell you any sort of that information about 12 volts and 2 amps. Even the manufacturer's website or doing some research online I was not able to find anything. Basically I need the AC adapter to plug underneath my coffee table that's a Chinese brand and it's to power 2 plug outlets on a hub. The usbs next to is already have power from the initial power plug that comes Hardware onto the table itself that runs the LEDs, and the USB Outlets. The only thing that doesn't power is those plug Outlets which require that AC adapter. Would a 12 volt 2 Amp work for this or do I need something else?

So if I need a plug for a 6 v 300mA 0.3 A item will a 6v plug allow it to work?

I have a very old casio org sa-10. Which i lost its adapter. It says DC 7.5v --- 1.6w. I am not sure which adapter to go . can you help about it. Thank you

6 v 1 A plug work?

Thats great video sir, but I have a quations so : 1. Can I use a type AC connector for DC ? For example I found a AC connector product the label max. current is 16 A. 2. If I use for DC is safe? How to calculate AC type connector and DC for to implementation? Best regard, Thanks

Can someone please help. I bought an unregulated supply to replace an old bulky charger which is a 2 pin shaver style plug that is on a UK adapter. The strange thing is when I measure the volts on the old one it actually reads 19V with a multimeter, but it says 12V output at 500mA on it. Whereas the new one reads 12V with multimeter. Here is what it says this on the back of each: OLD MODEL: Model: T-41-12-500D-3Pri PRI: 230V ~ 50hz 60mA SEC: 12V DC 500mA Centre positive (this is quite bulky and heavy) NEW ONE: Input: 100v ~240v AC 50/60hz Output: 12v DC 500mA Centre positive (very light and small) I plugged them both into the same device, which has a large internal battery and when you first plug in, the charge should stay at 99%, which means it's running off the mains plug and not the internal battery, which is correct. New plug shows it first at 75%, then 1 second later 65% and dropping so it seems to suck power out of the battery. Any help understanding this much appreciated.

I have a Dewalt jumpstarter.On the back of the jumpstarter it say the input volts is 14.5.One of my ac adapter is 12v.Is it ok to use 12v to charge the Dewalt jumpstarter.Can I use the 16v input ac adapter It's called Dx aeps14 ?

I have the correct sizes, except it's length, the length is too long... No shop reports the length.. Any suggestions? Its for my Asus vivobook, I need a 4,5 x 3,0 and its length is only 10mm

Could you help me I require the uk version of the following US plug. AC-DC ADAPTOR MODEL: 0300200DF INPUT: 120V AC 60Hz OUTPUT: 3.0V DC 200mA is that possible?

it amazes me how many people need this video, What also amazes me is how many people dont know that that LP2020 needs a beefy 5A for full power

My Kitchen faucet is from Allen+Roth and is powered by an 6 volts battery port, I'm looking an Ac adapter that can replace the battery port. The model # for the Allen+Roth Kitchen faucet is 67798W-120802 and Item # 2517130. I need your help please finding the right AC adapter.