where plus and where minus in the power supply for led strips

Question

Hello, I would like to connect the led strip, however, so as not to spoil the older charger, where is the plus and where minus? 2 cables go to the end and there is metal inside and outside but I don't know where what

zibq · Accepted Answer

The label should show polarization information. Make sure you can use any voltmeter.

MiernikZKauflanda · Accepted Answer

Usually + is inside and - outside; make sure, however, as recommended by a colleague above, send a photo of the rating plate.

MiernikZKauflanda · Accepted Answer

These straight and dashed lines mean that the power supply supplies direct current, and the number under them indicates that max. 1A. How much tape do you want to feed? I don't know if 1A may be enough.

By the way: the driver / LED strip will burn faster than the charger due to a bad connection; The charger may burn due to overload.

Added after 59 [seconds]:

https://www.olx.pl/oferta/zasilacz-huawei-hw-120100e1w-12v-1a-CID99-IDntaKI.html
This one is similar to this; has + inside and outside.

icosie · Accepted Answer

For safety, however, it is better to measure with a multimeter or indicator Led diode and 2-5 kOhm resistor connected in series. If you give a longer diode leg to the + power supply it will be lit.

icosie · Accepted Answer

Such power supplies are, on average, suitable for LED strips.
They do not have current regulation, which significantly reduces the operating time of the Led modules.

Generally speaking, how you connect will work, but you don't know how long.

icosie · Accepted Answer

It is best to always cut off the plus power supply, and if possible, arrange a double switch and cut off both

Zygaqra · Accepted Answer

As a mustard after lunch I will add that you do not have to worry about reverse connection of the power supply. LEDs withstand around 5V in the reverse direction, 12V strips have 3 diodes in series, so they can easily withstand a reverse connection. When you plug in the wrong way, they just won't shine. As a power supply, buy, if you don't have a 12V stabilized power supply, unstable without load can give up to 18V. On a stabilized power supply, non-junk tapes will calmly spend a few years.

piotr89699 · Accepted Answer

The cheapest way is to connect the led strip to the antenna adapter, maybe you have at home or someone you know. Yes, I have the power supply at the TV did not want to work properly but the tapes are ok, and it is stabilized at 12V

MiernikZKauflanda · Accepted Answer

I recommend battery for PLN 60 from the electronics store. You can directly connect the tape and you do not have to be afraid of overloading (unless you do several hundred meters of this tape )

000andrzej · Accepted Answer

Right but and

icosie · Answer

Hello

Find the polarity symbol on the power supply (such circles with the symbols + and -).
The line that goes inside the stamp indicates the polarization inside the socket.

If in doubt, upload a real photo of the power supply (rating plate).

best regards

EDIT:

It looks similar to the picture:
1. The top plus case in the middle
2. Case bottom minus in the middle

DrabU · Answer

This is exactly the huawei hw-120100e62 power supply
input 100-240v 50 60 Hz
output 12.0v and next to it there are two lines horizontally higher is straight and below it dotted 1.0a
efficiency level V is all that is written on it but unfortunately I have nothing to do at the moment

Added after 5 [minutes]:

about this power supply only with photos from the net

DrabU · Answer

father sorka bad zdj it is better

DrabU · Answer

However, plus inside and minus outside thanks! and I have 2 m of LED strips

DrabU · Answer

And where else to give the switch? in plus or minus does it matter?

DrabU · Answer

oh ok and if this power supply is not very good, what to look for? from the antenna or buy and mount this power supply what you need to solder to the electricity? the better ones from the electrician's shop?

where plus and where minus in the power supply for led strips

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