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\subsection{Power Technologies}

In order to supply the power for the board, mains power will be the overall input which will be rectified and regulated to some DC values. In this section, the various methods of rectification will be discussed and the positives and negatives of various rectifiers will be investigated. In order for the device to remain reliable and rugged, a proper choice should be made for rectification. If any step of the power supply catastrophically fails, the entire device will be compromised In terms of reliability, please reference \autoref{sub:PowerSystemDesign}, where a more in depth discussion regarding reliability can be found. 

In our application, it is important to keep the necessary current supply to the device in mind. The power consumed by the LED matrix will be significant, and as a result the rectifiers will be working fairly hard in order to supply both the LED matrix and the two microprocessors (the main micro and the Bluetooth device). Because of this, heat dissipation will become an important consideration in this application.
