7-Segment + Integrated Circuit

1/* This expirement requires:
2    1x arduino (UNO)
3    1x integrated  circuit ic74hc595 (IC7)
4    1x 7 segment common cathode display (SSD)
5    1X  breadboard (BBD)
6    8x 220k resistors (RES)
7    a bunch x wires/jumpers
8    ++Scroll to bottom for wiring schematic++
9    ++and lighting math table++
10*/
11
12int  latchPin = 2; //tells IC7 to dump stored data to SSD (pin2 UNO > pin12 on the IC7)
13int  dataPin = 3; //data from arduino to IC7 (pin3 UNO > pin14 IC7)
14int clockPin =  4; //clock from arduino to IC7 (pin4 UNO > pin11 IC7)
15
16/*The next line creates  an array.
17   Basically, an array is a spreadsheet that has Cols, Rows and a dozen  or more pages.
18   Note: The below table contains 18 characters, The index though  starts at 0.
19   So the 16th character, (int upArray[16]) would return 127.
20   arRay[3][4][5] is a valid array. (arRay[0,1,2]) returns 1st Col, 2nd Row, 3rd  Page.
21*/
22
23const byte upArray[18] = {1, 2, 4, 8, 16, 32, 64, 128, 63, 6,  91, 79, 102, 109, 125, 7, 127, 111};
24
25/* These numbers corrospond to the sum  of the SSD's pin address.
26    For instance, the number 1 needs to supply a low  signal to pins B and C.
27    Each pin is an increase of *2. pinA = 1, pinB = 2,  PinC = 4, PinD = 8, PinE = 16 and so on.
28    So to display a 1 you will need  to light up segmentB and segmentC = 2 + 4 = 6
29    6 will need to be send to the  IC7 to tell it to display 1 on the SSD.
30    The "." (decimal) = pinPD or the  8th pin or 1*2*2*2*2*2*2*2 or 128.
31    2 lights up pins A, B, D, E & G. or 1  + 2 + 8, 16 & 64. So, send the sum 91.
32*/
33
34void setup() {
35  Serial.begin(9600);  //This sets up the UNO to send information to you're IDE's serial display
36  pinMode(latchPin,  OUTPUT); //Sets your UNO pins to OUTPUTs from INPUTs (default)
37  pinMode(dataPin,  OUTPUT);  //You want to send data to the IC7, not receive data
38  pinMode(clockPin,  OUTPUT); //like you would for, perhaps, a sensor.
39}
40
41void loop() {
42  for (int j = 0; j <= 17; j++) { //sets j to number 0; if j <= 17; increase j by  1
43    //do the stuff in the {brackets}
44    digitalWrite(latchPin, LOW);  //remember,  when the latch is HIGH, the IC7 is dumping data to the SSD
45    shiftOut(dataPin,  clockPin, MSBFIRST, upArray[j]); //send data, your totals, from the UNO to the IC7
46    digitalWrite(latchPin, HIGH); //UNO tells IC7 to send the decoded totals to  the SSD
47    Serial.println(upArray[j]);   //Print (upArray[j]) to your IDE's  serial display
48    delay(1000);                  //A 1 second delay, then check  if j less than or equal to 17 again
49  }
50}
51
52/* blank = no connection
53  *  <r> resistor between connections
54   SSD : RES : IC7 : UNO : BBD
55   ---------------------------
56    A  : <r> : 15  :     :
57    B  : <r> : 1   :     :
58    C  : <r> : 2   :     :
59    D  : <r> : 3   :     :
60    E  : <r> : 4   :     :
61    F  : <r>  : 5   :     :
62    G  : <r> : 6   :     :
63    DP : <r> : 7   :     :
64    GND:     :     :     : GND
65       :     : 8   :     : GND
66       :     : 9   :     :     : NOT USED
67       :     : 10  :     : +5V
68       :     : 11  :  4   :
69       :     : 12  : 2   :
70       :     : 13  :     : GND
71       :     : 14  : 3   :
72       :     : 16  :     : +5V
73       :     :     : +5V  : +5V
74       :     :     : GND : GND
75----------------------------------
76Maths  table:
77 |A|B|C|D| E| F| G| PD|ttl1
78 |1|2|4|8|16|32|64|128|
790|1|2|4|8|16|32|  0|  0|63
801|0|2|4|0| 0| 0| 0|  0|6
812|1|2|0|8|16| 0|64|  0|91
823|1|2|4|8|  0| 0|64|  0|79
834|0|2|4|0| 0|32|64|  0|102
845|1|0|4|8| 0|32|64|  0|109
856|1|0|4|8|16|32|64|  0|125
867|1|2|4|0| 0| 0| 0|  0|7
878|1|2|4|8|16|32|64|  0|127
889|1|2|4|8|  0|32|64|  0|111
89.|0|0|0|0| 0| 0| 0|128|128
90*/
91