How to Change value of V out ?

[sanks85]

Hello Guys

I am using a circuit using XL6009.

I want to convert input 12v to 24v.

But i am not able to understand which element is responsible for changing the value of voltage ?

I am attaching the respective circuit.

Thank you very much.

 

[godfreyl]

R1 and R2 determine the output voltage as follows:
Vout = 1.25 * (1 + R2/R1)

So for the circuit you showed, Vout = 1.25 * 14.4 = 18V
For 24V output, you need r2 = 18.2 * R1.

You could use R1 = 1K and R2 = 18K. That should give 23.75V out, but it could be up to about 1V higher or lower than that due to component tolerances. If you need the voltage to be accurate, it is best to make R1 adjustable.

 

[sanks85]

Thank you so much godfreyl.

This thing works...