Hello to all forum users. I need advice on connecting the power supply

I don't know much about electricity and I couldn't find out what the dashed line on the cable means and what the continuous with the dashed one. Namely, I have two power supplies: one from the USA, i.e. for 110v and the other from Poland for 220v. I would like to change the tips because I need it for the phone, I just don't know which one with which. Pictures below: and the other cables: the US power supply is gray and has one cable marked with a solid line, while the other one from Poland has one cable marked with a solid and a dashed line. Can someone tell me how to connect it?

Check my friend what values are on this power supply from the USA. voltage and current. Will the one with the Polish power supply give advice when it comes to powering this phone. Personally, I would not suggest these stripes, check with a meter.

the one from Poland will do it because you can set the output voltage from 3 to 12 and the American one has 6.5v 500 mA at the output. It's just about changing the tip and I don't have a meter :/ if I connected it the other way around, could it make a short circuit?

DanielR625 wrote:

If I connected it backwards, could it cause a short circuit?

There is a high probability that the device connected in this way will go to the land of electronic scrap ...

well, but I guess this cable marking is for something? Does anyone know where the plus and minus are?

Different manufacturers use different markings, more than once I met that in one case the minus was on the strap and in another plus...

Hello.

DanielR625 wrote:

It's just a change of ending a I don't have a meter

As it was said: "you have a head ........., then combine".

The simplest way to determine the polarity of the supply voltage is careful observation. Find the marking on the casing of the power adapter or phone


In the event that we do not find this, things get a little more complicated, but there are still two methods:
1) invasive
2) non-invasive
Invasive consists in cutting the housing of the "American" power supply (it is glued) and observing the internal rectifier plate.

The non-invasive method requires some knowledge, caution and at least modest workshop facilities. If we have two transformer power supplies with a voltage of 110-120V on the primary side, we connect them in series and power them from the 230V mains. If we only have one, we connect a 15W/230V bulb in series with the primary winding. Now it remains to determine the polarity. We know that there is no multimeter, so an indicator sensitive to the polarity of the supply voltage must be used. We take an LED connected in anti-parallel with e.g. 1N4148 and the whole thing in series with a 680R resistor. Connect the set (power supply + light bulb) to the mains for a moment, and set the polarity with the diode. It will only light up in a specific case. And that's the end of the fun. We have obtained the answer to the question that bothers us, provided that we take far-reaching caution, because in the event of an electric shock, this knowledge will not be needed. ;)

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Topic exhausted. According to the rules of the department.

Thanks buddy for sharing it but I'm not really an electrician. I have such markings as YOU in the picture had. I'm just talking about cutting one and the other cable and connecting them together. I have a drawing, is that enough?

Hello.

If there are markings on both, it's even easier. All you need is a flashlight with a working bulb and a battery. You cut off the plug from the original power supply (110-120V) with a length of cable. On the housing, you look at the polarity markings and use the bulb to set the color of the wire (with or without a strip) connecting to the external contact (because easier access) of the plug. This is half the job. Now we proceed to identify the polarity in the new power supply. If you don't have anything to make the aforementioned indicator out of, then there's nothing else to do but a sharp knife. You gently and patiently cut the insulation from the socket to which the replaceable terminals are connected. It is best to do it from the side of the marked vein. If you get to its connection with the socket, you will compare it with the polarization described on the housing, depending on the position of the plug. All that's left to do is connect.

greetings

hello, cables are always marked, if it is a dotted line, it means a minus, and if the cable is continuous or only the color of the cable, it will always be a plus, greetings.