Here is the standard dual power supply using the Positive and Negative Voltage regulator ICs. It can give +12 volt and – 12 volt DC with a common ground.This power supply is ideal to power amplifier circuits that require well regulated dual power supply. It can give 1 ampere current to the circuit.
IC2 is 7912 negative regulator and its pins are slightly different from 7812. See the connection in the diagram. Regulated outputs from the regulator ICs are available from pin 3 which can be used to power the circuit. Capacitors C3 and C4 act as noise filters to give clean DC.