D-Link DSL-G684T Manual de usuario descargar pdf (Pagina 26)

Unit IV Implementation of Control System

4.1 Hardware

Process of creation of the hardware aspect of the project was rather not

complicated. It consisted of two parts, WCS (main control box) and BlackBox. In first case

as both electronic boards came completed the only two things I had to do were soldering

the headers to the WiFly shield and creating reset button with corresponding LED, connect

pins for servos and photocell and casing with place for antenna. Until the project was

finished all ideas were prepared and tested on the breadboard.

Reset button

The purpose of this button is to reset to default

wireless network parameters. To do that button must

be pressed from 3 to 6 seconds. To protect the board

pull-down 10k ohm resistor is placed in circuit. When

the pushbutton is open (unpressed) there is no

connection between the two legs of the pushbutton, so

the pin is connected to ground (through the pull-down

resistor) and we read a LOW. When the button is

closed (pressed), it makes a connection between its

Figure 15. Prototype version of control system based on breadboard

Figure 16. Prototyping part of the WiFly

shield seen from the bottom

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D-Link DSL-G684T Manual de usuario Pagina 26