This power supply is designed for Hi-fi Audio applications.
C1 & C2 capacitors to filter higher frequency noise from the transformer
secondary AC lines at the diode bridge.
AC input received from transformer is converted in to DC by Bridge rectifier D1.
Always use heatsink with bridge rectifier because without heatsink the bridge rectifier will gets hot.
So use suitable heatsink to get full output current from the bridge rectifier.
C7 & C8 capacitors to filter higher frequency noise right at the DC output of
the diode bridge.
C9, C10, C11 & C12 are the large reservoir capacitors to supply large current demands and stabilize the supply rails to minimize low frequency fluctuations.
C13 with R1 & C14 with R2 are to decouple the large electrolytic capacitors and reduce
impedance.
C15 & C16 are Film capacitors to filter high frequency Noise.
LED D2 with R3 & LED D3 with R4 are to indicate supply status.