Prometheus Assembly - Power supply block

(a) - regulator circuits

Component List

Components

PCB Top Side

Placement

(b) - minimal circuitry

Component List

Components

PCB Top Side

Placement

(c) - feedback

Component List

Components

PCB Top Side

Placement

(d) - electrolytic capacitors & protection (observe the polarity!)

Component List

Components

PCB Top Side

Placement

PCB Bottom Side

Placement Bottom Side

Now check voltages: +5В, +3.3В!