1. (2014) Arduino manuals. URL http://arduino.cc/en/Main/ArduinoBoardADK.
2. (2014) Digital potentiometers manuals. URL http://www.analog.com/.
3. (2014) Library of simulink for arduino. URL http://www.mathworks.it/hardware-support/.
4. (2014) Spi arduino library. URL http://arduino.cc/en/Reference/SPI.
5. (2014) Vopos manuals. URL http://www.smartfreeze.com.