For my next project I broke things up into stages. The first step was to build the power supply for the audio controller section of my next amplifier. This is a 3-way power supply for that audio controller. The various circuits within the controller required 5VDC, 12VDC and -12VDC. This supply was designed to handle all of those needs. It used 2 transformers and three voltage regulators with heat sinks.
On the left you can barely make out in the picture the 3 power LEDs, which monitored the status of the three supplies. The top one monitors the +5 VDC supply, while the next two (red / yellow) monitor the +12 / -12 VDC supplies. On the right you can see the two rectifiers I used off the transformers before going into the electrolytic caps and finally into the regulators, which were LM7805, LM7812 and LM7912, respectively.