creating a simple simulation

I'm trying to create a simple simulation using simscape elements of this circuit

http://imageshack.us/photo/my-images/195/immaginelyk.png/

Unfortunately I'm a newbie of simulink and I had problems. PIN 9, PIN 10 and PIN 11 represents the pin of ARDUINO UNO so if they are setted to HIGH produce 5 V otherwise they produce 0V. I created this

http://imageshack.us/photo/my-images/233/immaginerfo.png/

I had problem adding the ground to the system.

[Walter Roberson]

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Answer 1

[Ryan G]

You can try using a controlled voltage source and adding a ground to one end of the source and connecting the other end to your system. Furthermore, you should be able to add a ground after the diodes the same way you added the solver (by splitting the signal).