errors, errors and more errors

Projects Programming
3

Yeah, those are pretty typical syntax errors. You are constructing your compound conditionals wrong. Each comparison needs to be written out in full. This site describes the keywords and usage pretty well.

bobbybonez:
Hey guys,

ive been searching for quite a while and cant come up with a reason that I keep getting errors with this code. I've got some explanation inside the code of what im trying to acomplish. I keep getting

expected primary-expression before '||' token

or

expected ')' before ';' token

depending on what I do to try and remedy the other issues.

int fan = 2;

int switchpin = 3;
int led1 = 4;
int led2 = 6;
int led3 = 9;
int led4 = 10;
int sensorpin = A0; //potentiometer
int fanspeed = 255;
int brightness1 = 0;
int brightness2 = 0;
int brightness3 = 0;
int brightness4 = 0;

void setup() {
  // put your setup code here, to run once:
pinMode(fan, OUTPUT);
pinMode(switchpin, INPUT_PULLUP);
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
//if potentiometer reads ~50% or more then turn led 4 on and turn the fan onto full speed
if (analogRead(sensorpin) >= || == 500) {
  digitalWrite(led4, HIGH);
  analogWrite(fan, 255);
}
//if button is low turn all leds on high
else if (analogRead(switchpin) == LOW){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
}
// if button is low and potentiometer reads less then or equal to ~ 49%
//fade all lights in sequence
if (analogRead(switchpin) == LOW && analogRead(sensorpin) <= || == 499) {
  digitalWrite(led1, HIGH);
  delay(1000);
  digitalWrite(led1, LOW);
  (brightness2 = 255; brightness2 >=0; brightness2 -= 3)
  analogWrite(led2, brightness2);
  delay(30);
  (brightness3 = 255; brightness3 >=0; brightness3 -= 3)
  analogWrite(led3, brightness3);
  delay(30);
()  (brightness4 = 255; brightness4 >=0; brightness4 -= 3)
  analogWrite(led4, brightness4);
  delay(30);
}
// in all other occasions
else (analogRead(switchpin) == HIGH){
  digitalWrite(led1, HIGH);
  delay(300);
  digitalWrite(led1, LOW);
  delay(300);
  digitalWrite(led2, HIGH);
  delay(300);
  digitalWrite(led2, LOW);
  delay(300);
  digitalWrite(led3, HIGH);
  delay(300);
  digitalWrite(led3, LOW);
  delay(300);
  digitalWrite(led4, HIGH);
  delay(300);
  digitalWrite(led4, LOW);
}
}





also, is anyone aware of any site or video that really dumbs down what all the functions and terms mean? I have a basic understanding, but when I try to figure out some of the more advanced stuff i get kinda confused. the reference and language page are not written in laymens terms and most other pages i can find go over the very basic stuff that i already have done or know.

THANKS!!!