7805 Regulator

7805 +5 Volt DC 1 Amp Voltage Regulator

This step converts a varying DC input voltage into a constant 5 DC output voltage.

Series Regulator

Shunt Regulator

"Regardless of the relative regulation quality, the best performance will always be obtained with the power distribution feeds taken from the sense points."

• Walt Jung
  Regulator for High-Performance Audio
  http://waltjung.org/PDFs/Regs_for_High_Perf_Audio_1.pdf