some analog sensor pin i have. I'm actually having a bit of trouble, and I'm not sure if you can check this code out. as the code illustrates, i want to do what your previous code does, except amongst 3 leds. so as you go up sensor reading, the previous led fades, and the next fades up. heres what i have but the problem is the sensor reading is pausing and two led's are staying on and its very jerky. let me know what you'd suggest.
boolean compare = true;
const int pingPin = 7;
int avRead;
int ledPin = 9;
int ledPin2 = 10;
int ledPin3 = 11;
// LED connected to digital pin 9
int fadeValue;
void setup() {
Serial.begin(9600); // nothing happens in setup
pinMode (ledPin, OUTPUT);
pinMode (ledPin2, OUTPUT);
pinMode (ledPin3, OUTPUT); // ADD THIS
}
void loop() {
long duration, inches, cm;
// The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
pinMode(pingPin, OUTPUT);
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(5);
digitalWrite(pingPin, LOW);
// The same pin is used to read the signal from the PING))): a HIGH
// pulse whose duration is the time (in microseconds) from the sending
// of the ping to the reception of its echo off of an object.
pinMode(pingPin, INPUT);
duration = pulseIn(pingPin, HIGH);
// convert the time into a distance
inches = microsecondsToInches(duration);
cm = microsecondsToCentimeters(duration);
Serial.print(inches);
Serial.print("in, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
delay(100);
avRead = cm;
if(avRead == 12 && compare == true){ // fade up if avRead is >15 and fade down has run
for (int fadeValue = 0 ; fadeValue <= 255; fadeValue +=5) {
analogWrite(ledPin, fadeValue);
delay(20);
}
compare = false; // set compare for fade down when avRead goes 15 or lower next pass thru loop
}
if (avRead>=5 && compare == false ){
for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -=5) {
analogWrite(ledPin, fadeValue);
delay(20);
}
compare = true;
}
if(avRead == 12 && compare == true){ // fade up if avRead is >15 and fade down has run
for (int fadeValue = 0 ; fadeValue <= 255; fadeValue +=5) {
analogWrite(ledPin2, fadeValue);
delay(20);
}
compare = false; // set compare for fade down when avRead goes 15 or lower next pass thru loop
}
if (avRead>=20 && compare == false ){
for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -=5) {
analogWrite(ledPin2, fadeValue);
delay(20);
}
compare = true;
}
if(avRead == 27 && compare == true){ // fade up if avRead is >15 and fade down has run
for (int fadeValue = 0 ; fadeValue <= 255; fadeValue +=5) {
analogWrite(ledPin3, fadeValue);
delay(20);
}
compare = false; // set compare for fade down when avRead goes 15 or lower next pass thru loop
}
if (avRead>=36 && compare == false ){
for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -=5) {
analogWrite(ledPin3, fadeValue);
delay(20);
}
compare = true;
}}
long microsecondsToInches(long microseconds)
{
// According to Parallax's datasheet for the PING))), there are
// 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
// second). This gives the distance travelled by the ping, outbound
// and return, so we divide by 2 to get the distance of the obstacle.
// See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
return microseconds / 74 / 2;
}
long microsecondsToCentimeters(long microseconds)
{
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;
}