Adesso NUSCAN 3200 series Manual do Utilizador descarregar pdf (Página 8)

Shake and Bake:

Preliminary Design Report

October 12, 2011

Figure 2: Level 2 Functional Block Diagram for Power Supply

AC Voltage Step Down

This component drops the incoming 120 V AC to 20 V AC.

Rectification

Diodes are used to rectify the AC signal.

Filter to Remove Ripple

A filter is used to stabilize the signal, creating a steady output.

DC Step Down

Three DC step down components reduce the 20 V to the voltages required by the various

components that are powered by the power supply. The voltage is first stepped down to 12 V,

which is used to power the motors and the screen backlight. It is then stepped down to 5 V,

which is used to power the microprocessor, memory, sensors, keypad and scanner. Finally, the

voltage is stepped down to 3.3 V, which is used to power the screen logic.

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Adesso NUSCAN 3200 series Manual do Utilizador Página 8