IC Data Sheet for the Chip

Signal Name

Pin Number(s)

Input or Output

Internally Connected To

Clock

91

Input

UP 1 Education Board 25.125 MHz clock

Resetbutton

28

Input

Toggle module input

A

109

Input

Wind Direction module input

B

110

Input

""

C

111

Input

""

D

115

Input

""

Polarity

143

Input

Temperature Module Polarity input

Indata (3 down to 0)

131, 129, 128, 127

Input

Indata (3 to 0) input of the temperature module

Invstrobe

132

Input

Invstrobe input of the temperature module

D5

120

Input

D5 of temperature mopdule

D4

119

Input

D4 of temperature module

D3

118

Input

D3 of temperature module

D2

117

Input

D2 of temperature module

D1

116

Input

D1 of temperature module

Sensor1

146

Input

Sensor1 input of windspeed module

Sensor2

147

Input

Sensor two input of windspeed module

Clk_en

113

Input

Clk_en input of windspeed module

Cnt_en

114

Input

Cnt_en of windspeed module

E

126

Output Buffer

LCD hardware enable signal

Rs

144

Output

LCD register select harware signal

LCD Dataout (7 to 0)

142,141,139, 138, 137,136,134,133

Output Buffer

LCD Ascii encoded Data signal

ADC_CLOCK

148

Output

Slow Clock to the temperature A to D converter

 

Hardware Module Configurations

For most of the Hardware we constructed them according to the specs sheets we had for the various chips.

For the Temperature Hardware a LM35 Precision Centigrade Sensors was connected to a TLC7135C Analog-to-Digital Converter. The configurations used are circled on the first page of the LM35 and the Second page of the TLC7135. The following list explains the connections as used:

 

LM35: Vs + = 5V from a MC7805C Voltage regulator hooked to a AC adapter from 120V at 60Hz source

Vs - = -5V from a MC7905 Voltage regulator hooked to a AC adapter from 120V at 60Hz source

Vout = In + of TLC7135C A to D converter

TLC7135C:Pins 1-14 Vcc-= -5V from Voltage Regulator

REF = 1V from a OP177 Op-Amp, acting as a buffer, connected to the middle terminal of a 5k potentiometer (1V output) which is connected to a LM385-1.2 Reference diode configured as given in the spec sheets

Analog Common = Ground

INT OUT = Cint (see specs) = .47 uF

Auto Zero = Caz = 1uF (see specs)

BUFF OUT = Rint = 250k ohms(see specs)

Cref - = Cref = 1 uF

Cref + = Cref = 1 uF

In - = Ground

In+ = Vout of LM35

Vcc + = 5V from voltage regulator

D5 = D5 to chip

B1 = B1 to chip

B2 = B2 to chip

Pins 28 -15 Under Range = Open Cct

Over Range = Open Cct

Strobe = invstrobe output from chip

Run/hold = open cct

DGTL Gnd = Ground

Polarity = to chip input polarity

Clk = ADC_CLOCK output from chip

BUZY = open cct

D1 = D1 input to chip

D2 = D2 input to chip

D3 = D3 input to chip

D4 = D4 input to chip

B8 = B8 input to chip

B4 = B4 input to chip

For the windspeed and winddirection hardware a signle configuration ofa OPB804 Slotted Optical Switch was used for all the sensors. The inputs to the chip were called sensor1 and sensor2 for the windspeed, and a,b,c,d for the wind direction.

The configuration we used is outlined on the OPB804 specs sheet with the following connections:

 

E & A = +5V supply by the Voltage Regulator

C = Signal out line, and is also hooked across a 1k ohm resistor to ground

K= 250k ohm resistor hooked to ground

The final hardware module was the Sharp Dot-Matrix LCD Units with a built-in Converter which was hooked as detailed in the configuration given in the Appendix. To clarify the given diagram, the pin connections from 1 to 14 are:

Vss= Gnd

VDD = +5V

V0 = approx. 1.2 V from 5k pot middle connection

RS = RS ioutput from the chip

R/W = ground

E = E output from the chip

DBO - DB7 = DB0 - DB7 inputs into the chip