Lets given -

Vout = 5V

Vdd = 5V

Vref_TL431 =2.5V

TL817_CTR_ Standard one can assume 130% or as per datasheet

Vf_Led =1.4V

Now how do we calculate -

Detail explanations are welcome.

R1 = ?

Rlower=?

Rled=?

Rbias=?

C1=?

Rpullup=?

C2=?

Vfb=?

I need to understand black box calculation for each component >>

Thank you so much in Advance !!!