Correcting a path inside LM324, across transient photo-coupler of 50ua and Transistor Q12, not showed actually on circuit draft... It come to a conclusion where diode are photo coupling connected to ground and V+ from another photo coupler uniquely powering the photo-coupling to (like diode-to-diode-tunelling) injecting power to the Whole circuit... but alternatively its diode effect calculated here, because previous version from a Non Inverting DC Gain, the circuit did not return the exact power (where V0 = V1 + V2 − V3 − V4), See figure 17 from LM324-N from Texas Instrument. Also corrected the whole schema, an image is reflecting the content and automatically pointed here to my git, so my blog should reflect the images