analogRead()

Projects Programming
1

I would like to know if this pseudocode works with Analogread()

int volt = A0;
int val = 0;

val = analogread(voltage);

if(val <= 2.5volt){
do something

else
do nothing

2

almost, you are mixing integer types and floating point types.

try this.

float voltage = (5.0 * analogRead(A0))/1024;

if (voltage <= 2.5) 
{

}
else
{

}
3

Xenia2:
I would like to know if this pseudocode works with Analogread()

int volt = A0;
int val = 0;

val = analogread(voltage);

if(val <= 2.5volt){
do something

else
do nothing

Or just leave it as an int and do int math.

int volt = A0;
int val = 0;

val = analogread(voltage);

if(val <= 512){
 do something

else
 do nothing
4 
int volt = A0;
int val = 0;

val = analogread(voltage);

But make sure you spell-check it all first.

5

I would like to know if this pseudocode works

It's pseudo code of course it will not work that is what the pseudo bit means -> pretend.
As a template it works fine, but you don't need the else if you want to do nothing, it will do that by itself.

6

Yup, I just noticed :slight_smile:

AWOL:

int volt = A0;

int val = 0;

val = analogread(voltage);



But make sure you spell-check it all first.
7

The following code is monitor the voltage and if the voltage fall within 2.40 - 2.60 its
goes into infinite loop. Under normal operation voltage is approx zero, but sometime
it unexpectly fall within this value, which I do not wanted.

So to fix this, I need to say if voltage fall within 2.40-2.60 for one second then do the
if statement. How do I do it?

float voltage = (5.0 * analogRead(A0))/ 1024;
  if (voltage >= 2.40 && voltage <=2.60)
  {
    while(1)
    {
      digitalWrite(red, !digitalRead(red));
      delay(1000);
    }
  }
8

You could look for clues in the blink-without-delay example.

9

Are you suggesting that I use delay function millis() after analogRead()? I already have a millis() for something else.

10

you're correct, I should watch what I am saying :slight_smile: