                         +------+
                   +-----|LM317 |--------+->  VCC0
                   |     +---+--+        |
                   |         |           |
                   |         |  +-----+  |
                   |         +--+     +--+
                   |        +++ +-----+
                   |        | |
                   |        | |
                   |        +++
                   |         |
                   |       --+--
                   |
                   |
             |\|   |     +------+
o------------| |---+-----| 7805 |---------->  VDD
             |/|   |     +---+--+
                   |         |
                 -----       |
                 =====       |
                   |         |
                   |         |
o------------------+---------+------------->  GND
                   |         |
                   |       --+-- 
                 -----
                 =====
                   |
                   |
o------------------+----------------------->  GND





