If Statement HELP!

Forum 2005-2010 (read only) Software Syntax & Programs
1

to measure distance.

and what i'd like to do is to add and if statement, can I do the following.

if (value of pin 7 < 50cm)
{
output pin 6 = high
}
.

how can I do the above in Arduino?

Bassam

2

if (value of pin 7 < 50cm)
{
output pin 6 = high
}

Try something like this:

if (analogRead(7) < 50)
{
digitalWrite(6, HIGH);
}

Lefty

3

thnx for the reply,

i'm trying to create now PWM using Adruino UNO.

any errors in the following if statement?

if (cm >= 0 && cm <= 280)
{
x = ((cm/300)*255); // x is int, and cm is long
else

x = 255;
}

analogWrite (ledPin, x);
delay (30);

PS: i'm adding this inside the void loop () of the following PING ))) code.

4 
x = ((cm/300)*255);

If cm is an int, in the range 0 to 280, cm/300 will be 0.

You need to multiply by 255, first, then divide by 300, or cast the values to floats, so integer division is not performed.

5

any errors in the following if statement?

if (cm >= 0 && cm <= 280)
{
x = ((cm/300)*255); // x is int, and cm is long
else

x = 255;
}

analogWrite (ledPin, x);
delay (30);

basically yes!
the syntax is
IF (condition)
{
do this
}
ELSE
{
do this
}

you have your else inside your first "do this" !