+--------------+
                !              !
  +-------------+ 8051 module  !
  !             !              !
  !             +--------------+
  !
  !                    +--------+
  !                    !        !
  !           +--------+ servos !
  !           !        !        !
----- 9V    ----- 6V   +--------+
 ---         ---
  !           !
  !           !
  !           !
  +-----------+
  !
--+-- GND
 ---
  -