The man (Geoff Graham) who designed the Maximite PIC based computer project featured recently in Silicon Chip has a web site where he describes some of his other projects. One is a very simple but useful Utility Power Supply.
My only concern is that there is no current limiting, which is vital to avoid damage due to shorts or wrong connections to your protoboard etc. Implementing this may be worth looking at, without making a neat project too complex. I have a couple of Arlec transformers that may be suitable if I can live with lower total current.
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