Hello,
I was trying to follow drone bot workshop's video on the 7 segment digit display. I used the ic and was trying to make "1" appear. Though when I made a binary data array for the characters 1,2,3,4,5,H,O the first two sets were making a weird shape. Here is the array:
int datArray [7] =(B01100000, B11011010);
digitalwrite(latchPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, datArray[num]);
digitalWrite(latchPin, HIGH);
do you know what is wrong?
Yes.
The code you posted is incomplete.
I'm surprised you didn't notice this.
Why have a seven element array 5/7ths full of zeroes?
You should make your datArray a byte array rather than int otherwise you are just wasting memory since shiftOut expects a byte for the data.
Also...post your entire sketch!
Link please.
What IC?
That is most likely because your numbers in the array are wrong.
Shift registor: 74HC595
link: 74HC595 & 74HC165 Shift Registers with Arduino - YouTube
Code:
#include "dht.h"
#define dht_apin A0 // Analog Pin sensor is connected to
#define ElecPin A1
dht DHT;
int num = 0;
int goPin = 2;
int noPin = 3;
int set_Temp = 28;
int toggleState = 0;
const int latchPin = 10;
// SH_CP pin 11
const int clockPin = 11;
// DS pin 14
const int dataPin = 12;
byte datArray[9] = {B01100000, B11011010, B11110010, B01100110, B10110110, B01101110, B11111100};
void setup(){
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);
pinMode(4, OUTPUT);
delay(2000);
digitalWrite(4,LOW);
pinMode(goPin, OUTPUT);
pinMode(noPin, OUTPUT);
}//end "setup()"
void loop(){
//Fastest should be once every two seconds.
AC_Norm();
delay(1000);
}// end loop()
void AC_Norm(){
DHT.read11(dht_apin);
float temp = DHT.temperature;
if(temp>18.00){ digitalWrite(goPin, HIGH);
digitalWrite(noPin, LOW);
}
else{if(temp<18.00){ digitalWrite(goPin, LOW);
digitalWrite(noPin, HIGH);
}
}
num = 1;
delay(5000);//Wait 5 seconds before accessing sensor again.
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, datArray[num+2]);
digitalWrite(latchPin, HIGH);}
//Start of Program
Do you have a question?
Well in the array when I want the display to show 1, I choose B01100000 to do the job, but it makes a weird shape.
oops made a mistake.
this is what I mean
shiftOut(dataPin, clockPin, MSBFIRST, datArray[num]);
Would not "1" be B00000011? 
Segment "a" is the LSB.
Hi,
This is dronebot's code, did you try it before adding the DHT, to test your display?
/*
74HC595 Shift Register with 7-segment LED display
74hc595-7segdisplay.ino
Count in hex from 0-F and display on 7-segment Common Cathode LED display
DroneBot Workshop 2020
https://dronebotworkshop.com
*/
// Define Connections to 74HC595
// ST_CP pin 12
const int latchPin = 10;
// SH_CP pin 11
const int clockPin = 11;
// DS pin 14
const int dataPin = 12;
// Patterns for characters 0,1,2,3,4,5,6,7,8,9,A,b,C,d,E,F
int datArray[16] = {B11111100, B01100000, B11011010, B11110010, B01100110, B10110110, B10111110, B11100000, B11111110, B11110110, B11101110, B00111110, B10011100, B01111010, B10011110, B10001110};
void setup ()
{
// Setup pins as Outputs
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);
}
void loop()
{
// Count from 0 to 15
for (int num = 0; num < 16; num++)
{
// ST_CP LOW to keep LEDs from changing while reading serial data
digitalWrite(latchPin, LOW);
// Shift out the bits
shiftOut(dataPin, clockPin, MSBFIRST, datArray[num]);
// ST_CP HIGH change LEDs
digitalWrite(latchPin, HIGH);
delay(1000);
}
}
Get the test code working on your project before editing code.
What displays are you using?(part number)
Common anode or common cathode?
Tom... 
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