that depends on that how endpoint devices are designed, correct? thx

Certainly that is correct. Most consumer electronics is designed to work with the range of mains voltages normally experienced.

 

Certainly that is correct. Most consumer electronics is designed to work with the range of mains voltages normally experienced.

yeah but the worst thing is its stated nowhere in manual. Maybe only option to contact manufacturer.

 

yeah but the worst thing is its stated nowhere in manual. Maybe only option to contact manufacturer.

That is not mentioned because just like data sheets, very specific values are difficult to reproduce exactly. AND, it would confuse a lot of people who would not even understand.

 

but is it okay to do it way i proposed?

use 16awg (in regards to Ampers there is huge capacity) and depends on the length and Voltage drop; i buy psu which will have Total Voltage = {Voltage of the endpoint device} + {calculated Voltage drop}

 

I certainly suggest using an adjustable power supply. They are quite common from electronic components sellers.

 

so all 5v solved by
https://www.ebay.co.uk/itm/317358762085

all 12V by
https://www.ebay.co.uk/itm/317358763581

but can anyone recommend DC 19-20V (adjustable), 3.5A and brand good as Meanwell?
or some converter DC/DC from 24->to 19-20V

thanks

 

so i found from the old laptops
1) 19.5V 6.7A
2) 20V 3.25A

any idea if i can use both of these in case the original one is 19V 3.43A?

using awg18 -> 1V drop (option 2)
using awg 16 -> 0.65V drop (option 1)

thanks!

 

Why not use the same supply as now and just extend the connections??

 

@MisterBill2 bc of 1V drop.

 

@MisterBill2 bc of 1V drop.

IF the device being powered is a computer, that 1 volt drop may not matter.

 

@MisterBill2 i was not aware of that , ie a computer can sustain 1v drop. Its computer yes.

 

@MisterBill2 i was not aware of that , ie a computer can sustain 1v drop. Its computer yes.

Consider that the actual computer system logic uses either 5volts, or more likely 3.3 volts, although if there is an LCD color screen there are other voltages also used. My small computers also have a 12 volt battery pack. So the 19 volts is regulated down by switcher power supplies.

 

thats just computer - no LCD/screen. intelNUC

 

OK, and keep in mind that none of that system runs on 19 volts. Computers might still use 12 volts to spin a hard drive, but probably not current ones. So that voltage goes straight into a switcher regulator.

 

okay seems that main point regarding the V drop is missing in the whole thread hence whole approach here is pointless...

the voltage drop happens only during the load, possibility to increase PSU voltage wont fix anything it can damage endpoint devices.. especially usb ones.

Higher current ... bigger drop etc...

The only solution is to use 12/24 and dc-dc modules close to the endpoint devices 12/24 to 5v
or 3-5.5V to 5V dc-dc module, these modules are pretty costy...
https://www.pololu.com/product/2574?utm_source=chatgpt.com

seems the whole design that was on my mind is faulty.

 

The TS has just described to the rest of us exactly the reason why we do not have DC voltage distribution wide spread in most buildings. Having long wires for power delivery past the rectifiers and regulators and filters leaves an uncertain voltage drop in the wires. Certainly that drop is a problem that many folks choose to avoid.

 

The TS has just described to the rest of us exactly the reason why we do not have DC voltage distribution wide spread in most buildings. Having long wires for power delivery past the rectifiers and regulators and filters leaves an uncertain voltage drop in the wires. Certainly that drop is a problem that many folks choose to avoid.

@MisterBill2
because i used 1mm2 core,
i changed to 6mm2 core and i cant measure with voltmeter drop... so apparently its not about drop but something else...

 

@MisterBill2
because i used 1mm2 core,
i changed to 6mm2 core and i cant measure with voltmeter drop... so apparently its not about drop but something else...

OK, not the resistance but still, it could be the inductive reactance causing a problem. Or even being a resonant length. ALSO, consider the added cost of the heavier wire. It might also be an inadequate connection someplace in the circuit.
My point is that certainly DC distribution has been possible for many years, but is very seldom used. Possibly for a valid reason? IF it were the better choice many folks would use it.

 

Wire was 15 euro.

I dont know what is it. All 6 devices works fine... Only that one is problematic.

Yes i dont wanna have in living room 10 power sockets, and mess the space. And i dont wanna use any cabinet.

 

to that problematic device voice-pe i will add as chatgpt suggested


Add a capacitor close to the Voice PE input:

• 470 µF – 1000 µF electrolytic
• + 100 nF ceramic in parallel