Computer PSU wire question? Answered

Hi all, I want to turn an old computer PSU into a lab bench PSU.  After cutting all the connectors at the end of the cables, I've noticed that some of the common (black) wires were made of copper, while some of them were made of nickel \ aluminum (Silverish). The same is true for the +5V (red) cables. It's not the first PSU I noticed that had the different materials, and I was wondering: 1) Why are there two different kinds of wire? 2) Is it OK to ignore the wire material and just splice all the blacks together, and all the reds together? Thanks!

Question by Morgantao   |  last reply


Only read this if you are a kind person. Thank you.

Thank you for taking time to read this post. I realize it is rather long. If you are not a patient person, you may wish to simply skip reading this.I live in Washington DC and am looking to purchase something very specific, preferably from a reputable online retailer. I am a simple person, without any formal education. I know nothing about electronics or engineering. I hope you can be patient with those facts. I have no tools, no skills, no money, no knowledge.I'm searching for something that has been surprisingly difficult to find. Please, if you haven't got anything constructive to comment about this post, would you please just not say anything? Life is already difficult enough without negative words or sarcasm. Perhaps you might know of other internet consumer bulletin boards/forums that might be better places to ask this question? There don't seem to be very many at all.I am well aware that most modern cell phones easily fill the requirements that I am about to describe. Unfortunately, this item is needed for elderly people who are very suspicious of and dislike all things new. They violently refuse to accept a cell phone.Even if perfect, it's going to be a battle to get them to try it or use what I am searching for.So. Here we go. Maybe I can't find ALL the features, but here is what I am hoping to find:This needs to be a digital timer that can be set to go off at a minimum of six different times in one twenty four hour period, regularly.It has to have both an audible alarm and a strong vibration, and it has to be switchable between these two. Even better if it also flashes or lights up when the alarm goes off, and that also has to be optional, switchable. Very good if the strength of the sound or vibration can be adjusted easily.Should have a belt clip, preferably made out of metal, not cheap plastic.Should have a place where a neck rope could be easily attached and detached.Should have buttons that can be locked, so that no accidental changes by accidental bumping will occur.Should be water resistant. I'm talking about it being able to take a splash from a sink, not something to withstand being taken in the shower.Should also function as a typical normal digital watch with calendar feature. should be SWITCHABLE between calendar and clock view, so that all letters and numbers are as LARGE as physically possible,not all crammed on one tiny screen.Display should be larger than a normal watch, but the overall device must be small enough that a senior would not be upset to wear it around the neck or put it in a pocket, such as a normal shirt pocket.Great if it includes a strong LED flashlight feature, something with an on/off button, NOT a button that you have to hold the button down every second that you want the light to beam.Display should either be always back lit or at least have a button that will make the display light up without having to hold that button down the entire time you want it back litGreat if it came with a DVD of instructions with video, not a flimsy booklet with tiny letters written by someone who can't correctly speak English.It must run on batteries that can be purchased at any national retail chain, such as WalMart or Target. Fine if it has a very long life rechargeable battery built in, but not so fine if that battery is welded in so that it deliberately cannot ever be replaced.Good if it is able to run on the type of rechargeable replaceable batteries such as Nickle Metal Hydride or one of the others, without damage to the device.If it MUST be a plug into the wall rechargeable type, the cable cannot be a tiny pain in backside USB cable, it should be very simple and EASY for someone with arthritis and bad eyesight to plug in, perhaps with a charging cradle dedicated for the purpose, which can just be left plugged in somewhere.The charging device should have bright clear LED lights showing both that the device is currently charging as it should be, and another light that will FLASH to indicate it is now fully charged.Should sell for a price that a person that worked a lower middle class life and now barely gets by on Social Security could afford to buy. This device is not for me, if that matters at all. It is for people I care about.

Question by bearcat2222