1003 B
1003 B
1 Power supply block
(a) - regulator circuits:
Component List:
PCB Top Side:
(b) - minimal circuitry:
Component List:
PCB Top Side:
(c) - feedback:
Component List:
PCB Top Side:
(d) - electrolytic capacitors & protection (observe the polarity!):
Component List:
PCB Top Side:
PCB Bottom Side:
Now check voltages: +5В, +3.3В!