change of value of a variable in a specific time

Projects Programming
1

i am increasing the count of a variable, i need to make the variable value zero if there is no change in last 1sec of time, can anyone tell me how to go about it ??

2

There's no such thing as an "if" loop.

Post your code.

3

Something like that maybe

unsigned long lastChange;

void ChangeValue()
{
  value = something;
  lastChange = millis();
}

void loop()
{
  if ( millis() - lastChange >= 1000 )
    value = 0;
}
4

AWOL:
There's no such thing as an "if" loop.

Post your code.

int Sh1_data = 2;
int Sh1_latch = 3;
int Sh1_clock = 4;
int c = 0;
int c1 = 0;

int seq1[7] = {
0,7,14,28,56,112,224};
int seq2[7] = {
224,112,56,28,14,7,0};

void setup()
{
Serial.begin(9600);
pinMode(Sh1_data,OUTPUT);
pinMode(Sh1_latch,OUTPUT);
pinMode(Sh1_clock,OUTPUT);

}

void loop()
{

float GX = analogRead(A0);
float GZ = analogRead(A1);
Serial.print("Gyro X value = ");
Serial.print(GX);
delay(5);
Serial.print(" : ");
delay(5);
Serial.print("Gyro Z value = ");
Serial.println(GZ);
Serial.print(c);
delay(50);
if (GX < 150)
{
c++;
if (c==3)
{
for (int n=0; n<7; n++)
{
digitalWrite(Sh1_latch, LOW);
shiftOut(Sh1_data, Sh1_clock, MSBFIRST, seq2[n]);
digitalWrite(Sh1_latch, HIGH);
delay(75);
}
c=0;
}
}
if (GX > 300)
{
c1++;
if (c1==3)
{
for (int n1=0; n1<7; n1++)
{
digitalWrite(Sh1_latch, LOW);
shiftOut(Sh1_data, Sh1_clock, LSBFIRST, seq2[n1]);
digitalWrite(Sh1_latch, HIGH);
delay(75);
}
c1=0;
}
}
}

in the above code , i need to make the value of 'c' zero when there is no change for 1sec. ?? can you help me ???

5

Yes, I'd go with the approach in reply #2.

(I live in hope that when I write "post your code", the implied "...between code tags" is recognised)

6

guix:
Something like that maybe

unsigned long lastChange;

void ChangeValue()
{
 value = something;
 lastChange = millis();
}

void loop()
{
 if ( millis() - lastChange >= 1000 )
   value = 0;
}

Tanq very much, perfectly apt for my situation :slight_smile: