Adesso NUSCAN 3200 series User Manual download pdf (Page 7)

Shake and Bake:

Preliminary Design Report

October 12, 2011

Power Supply

The power supply converts a 120 V AC signal from a standard home wall socket into a

12 V DC signal. It then steps this voltage down to the amounts required by the various electrical

units used in the device. The power is supplied to the microprocessor, memory, keypad, scanner,

screen, sensors and motors. The power supply will be purchased or built to meet requirements.

The level 2 block diagram for the power supply is shown in Fig. 2. This diagram includes the

components that will be needed if the power supply is built.

Input 120 V AC from wall

Output 5 V DC, 45 mA to microprocessor

5 V DC, 3 mA to memory

5 V DC, 45 mA to keypad

5 V DC, 25-80 mA to scanner

3.3 V DC, 8.6 mA to LCD screen for logic

12 V DC, 20 mA to LCD screen for backlight

5 V DC, 2 mA to each sensor

12 V DC, 82 mA to each motor

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Adesso NUSCAN 3200 series User Manual Page 7