user19413: I am using an LCD (16x2) with an Arduino Uno R3, in for that I need a 10 kΩ potentiometer, but I don't have it now. How can I replace that?
I have resistors of many kinds and a 1 kΩ potentiometer.

user19853: Derived from Ohm's Law:

R = R1 + R2 + ... + Rn (For resistors in Series)
(1/R) = (1/R1) + (1/R2) + ... + (1/Rn) (For resistors in Parallel)


You can use any resistance from 1k to 10k with your LCD but the actual value depends on your choice and preferences. You may start with 5k and if you have one then its allright. But if you do not have a resistor of that value you can join resistors of lower values in series with your 1k POT to get resistance of 5k ~ 6k.
In such a way you may get a variable resistance (1k pot) with a suitably high value (other resistors in series). If you wish, you may add more resistors to get higher values like 8k ~ 9k and so on.

user4143: Just use your 1k pot in place of the 10k pot. The resistance doesn't matter that much (though you don't want to go loo low or you could draw too much current) since it is just being used as a voltage divider to set an offset point for the LCD.

19413: <p>I am using an LCD (16x2) with an Arduino Uno R3, in for that I need a 10 k&Omega; potentiometer, but I don't have it now. How can I replace that?</p>

<p>I have resistors of many kinds and a 1 k&Omega; potentiometer.</p>
 19853: <p>Derived from Ohm's Law:</p>

<ul>
<li>R = R1 + R2 + ... + Rn (For resistors in Series)</li>
<li>(1/R) = (1/R<sub>1</sub>) + (1/R<sub>2</sub>) + ... + (1/R<sub>n</sub>) (For resistors in Parallel)</li>
</ul>

<hr>

<p>You can use any resistance from 1k to 10k with your LCD but the actual value depends on your choice and preferences. You may start with 5k and if you have one then its allright. But if you do not have a resistor of that value you can join resistors of lower values in <strong>series</strong> with your 1k POT to get resistance of 5k ~ 6k.</p>

<p>In such a way you may get a variable resistance (1k pot) with a suitably high value (other resistors in series). If you wish, you may add more resistors to get higher values like 8k ~ 9k and so on.</p>
 4143: <p>Just use your 1k pot in place of the 10k pot. The resistance doesn't matter that much (though you don't want to go loo low or you could draw too much current) since it is just being used as a voltage divider to set an offset point for the LCD.</p>
