Positive and negative DC regulated power supply circuit

Using a power supply circuit with integrated positive and negative voltage regulators, the secondary side output voltage of the transformer is 24V. The output DC voltage after full-wave rectification
is 24VXo. 9- 21. 6V. The two 1000_uF
capacitors are the filter capacitors of the two bridge rectifier circuits .
After being stabilized by the integrated voltage regulator, positive and negative 15V
DC power supplies are output respectively.
    The internal voltage stabilization system and ripple elimination system of the integrated voltage regulator
are very complete, so the filter capacitor does not need to be too large. In particular,
the currently widely used voice-activated light switches are all powered by this power
supply.