Using electronics power supply as laptop universal psu

[Uranium-235]

Like, power supplies like this

https://www.amazon.com/Variable-Digi..._df_B07X2VZSL9

And wire it with a wire and tip from this

https://www.amazon.com/Universal-Lap.../dp/B07DNWSSMC

Or would the dc be too dirty for something like a laptop that requires serious filtering from it's adapters?

I just wish universal power adapters came im larger sizes for techs to troubleshoot laptops of all sizes, even high wattage gaming ones

Maybe I could put a high ripple cap in line to smooth the dc out

Maybe just...get a 280w adapter for a gaming laptop and split the universal wire with all those nice tips into it? Of course, the smaller size wire from the 120w adapter will probably heat up if I'm using the full 280w

Ideas?

[stj]

Re: Using electronics power supply as laptop universal psu

those bench supplies are much better than the laptop bricks, you can use one - but you need to get the matching cable for the laptop.

the problem with most clone-cables is the wires are too thin, and they ususally dont have the "one-wire" memory chip used to tell the laptop that it's the right charger. (dell/hp mostly)

of course if you have a faulty charger to recover the cable and possible memory chip then no issues.

[diif]

Re: Using electronics power supply as laptop universal psu

I use my bench power supply for laptops all the time.
If you use it on Dell or HP then it won't charge the laptop but it will power it on.
I have 19v 6300A Toshiba adapter with the standard tip (5.5x2.5) , these adapters plug into them https://www.aliexpress.com/item/4000253125083.html

[stj]

Re: Using electronics power supply as laptop universal psu

If you use it on Dell or HP then it won't charge the laptop but it will power it on.

i can help with that,
i have some pic code that simulates the dallas 1-wire chip

[Topcat]

Re: Using electronics power supply as laptop universal psu

I use my bench power supply for laptops all the time.
If you use it on Dell or HP then it won't charge the laptop but it will power it on.

Yup, I do this too. With my scope, my variable volt bench supply output is far cleaner than any brick or even consumer-grade ATX PSU. The server grade ATX's OTOH tend to have very clean outputs....but I digress.

If you have a laptop without a brick, you absolutely can power them up with a bench supply, you just need to know the voltage (most are 19v)....but like Diif said, some HP's and Dell's wont charge (always the 3-wire fatty plugs I've noticed).

[Per Hansson]

Re: Using electronics power supply as laptop universal psu

Yes it is super useful to run a laptop from a bench power supply when troubleshooting.
Because you will also have the ability to set sensible current limits to prevent stuff from blowing up.
And a built in power meter that tells you if any component you replaced improved things.
Good example here: https://www.badcaps.net/forum/showpo...9&postcount=17