This sircuit is maked for an LDR drived by feedback voltage through an LED to handle the width of pulses of a boost converter as describe in previous upload sircuit of PWM maked with CMOS NOT GATE 4049. The left pot control manually the (+)Dutty cycle of the pulse and the right one from the feedback voltage.This is a sircuit considering experimentation.LED & LDR they faced each other inside in a dark tube avoid external light.
