Dear Sirs,
Greetings!!
I have been struggling with 6 Inch height 7-Segment display.I have checked hardware circuit 4-5 times seems ok.
Rui Santos, https://randomnerdtutorials.com code is being tested on said display.Although thid code for temp,here I use POT as
Temp Sensor is not available with me.
Above code is already tested on tiny 7-Segment display was working on same common anode method.
But when I have used same code for 6 Inch LED Strip display,nothing happened even none of anystrip powered up.
A) Both 5V & 12 V GND connected together
B) initially 100 nF capacitor put near 74HC595 between VCC & GND,later stage 1000mF tried.
7-Segment (8 Inch Height)
Method : Common Anode
LED : Mono Color (Red) LED Strip (3 Led per strip)-12Volt
What could be possible cause not to allow me ?
a) Circuit diagram is attached.(Current limiting resrtors are not used as LED strip has own limiting resistance)
Please guide & help me.
Thanks
Kind Regards.
Dino_T
/* Common anode
Temperature Sensor Displayed on 4 Digit 7 segment common anode
Created by Rui Santos, https://randomnerdtutorials.com
*/
//#include <ShiftDisplay.h>
const int digitPins[4] = {4, 5, 6, 7}; //4 common anode pins of the display // const int digitPins[4] = {4, 5, 6, 7};
const int clockPin = 11; //74HC595 Pin 11
const int latchPin = 12; //74HC595 Pin 12
const int dataPin = 13; //74HC595 Pin 14
const int tempPin = A0; //temperature sensor pin
//const int DISPLAY_TYPE = COMMON_ANODE;
//ShiftDisplay display(latchPin, clockPin, dataPin, DISPLAY_TYPE, 4);
const byte digit[10] = //seven segment digits in bits
{
B00111111, //0
B00000110, //1
B01011011, //2
B01001111, //3
B01100110, //4
B01101101, //5
B01111101, //6
B00000111, //7
B01111111, //8
B01101111 //9
};
int digitBuffer[4] = {0};
int digitScan = 0, flag = 0, soft_scaler = 0;
;
float tempK, tempC, tempF, temp;
void setup() {
for (int i = 0; i < 4; i++)
{
pinMode(digitPins[i], OUTPUT);
}
pinMode(tempPin, INPUT);
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);
pinMode(tempPin, INPUT);
}
//writes the temperature on display
void updateDisp() {
for (byte j = 0; j < 4; j++)
digitalWrite(digitPins[j], LOW);
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, B11111111);
digitalWrite(latchPin, HIGH);
delayMicroseconds(1);//100
digitalWrite(digitPins[digitScan], HIGH);
digitalWrite(latchPin, LOW);
if (digitScan == 2) // Hame 4 Digit Chahiye without DP
//**********************************************************************************************************************************
shiftOut(dataPin, clockPin, MSBFIRST, ~(digit[digitBuffer[digitScan]] | B10000000)); //print the decimal point on the 3rd digit
//**********************************************************************************************************************************
else
shiftOut(dataPin, clockPin, MSBFIRST, ~digit[digitBuffer[digitScan]]);
digitalWrite(latchPin, HIGH);
digitScan++;
if (digitScan > 3) digitScan = 0;
}
void loop() {
tempK = (((analogRead(tempPin) / 1023.0) * 5.0) * 100.0);
tempC = tempK - 273.0; //Converts Kelvin to Celsius minus 2.5 degrees error
tempF = ((tempK - 2.5) * 9 / 5) - 459.67;
tempC = int(tempC * 100); //Celsius temperature display
digitBuffer[3] = int(tempC) / 1000;
digitBuffer[2] = (int(tempC) % 1000) / 100;
digitBuffer[1] = (int(tempC) % 100) / 10;
digitBuffer[0] = (int(tempC) % 100) % 10;
updateDisp();
delay(2);
}
