hi guys , i just wanted to know if a 1k potentiometer is suitable for the arduino 5v output
‘Output’ or do you mean input?
If you are connecting the pot between 5v and GND, your cct. will draw 5v / 1k = 5mA
If you used 10k, this only draws 500uA.
Tell us ‘exactly’ what you are wanting to do.
some analog readings
Tell us 'exactly' what you are wanting to do.
1k would work as an attenuator on an analog input, but we need to examine your complete project.
Show us a good schematic of your circuit.
Show us a good image of your wiring.
Give links to components.
Posting images:
https://forum.arduino.cc/index.php?topic=519037.0
https://www.amazon.fr/gp/product/B00QLTVKUI/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 i haven't wired everything yet but i plan to do this
with the basic readanalog program
That circuit you have attached will work.
That potentiometer will work.
so , what are pots of 10k or even 50 k used for ?
MDAir:
so , what are pots of 10k or even 50 k used for ?
These pot just use less current than the 1K pot when they are configured as in your circuit.
Apply ohms law to the 1K resistor across 5v, work out the current flowing through it.
Then do the same for 10k and 50k.
These values become important if you are trying to minimise current consumption.
Tom... 
MDAir:
so , what are pots of 10k or even 50 k used for ?
In that circuit, the same thing. You could use any of those values in your circuit and it would still work.
Steve