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/* Light turning assistant for cars (cornering lights)
Credits to users Dr_P and jucole at http://mjlorton.com forum
Version designed for use with relays equipped with photocoupler (JD-VCC pin)
(Pinout bank 1: [[JD-VCC, VCC]], GND; Pinout bank 2: GND, IN1, IN2, VCC)
More details about reversed connection: http://arduino.cc/forum/index.php?topic=79745.0
*/
int fogL = 8; // 55W Relay for L fog lamp
int fogR = 7; // 55W Relay for R fog lamp
int indL = 4; // Circuit between multiswitch and indicator relay
int indR = 2; // Circuit between multiswitch and indicator relay
int swBoth = 3; // Separate switch for both fog lights
void setup() {
pinMode(fogL, OUTPUT);
pinMode(fogR, OUTPUT);
pinMode(indL, INPUT);
pinMode(indR, INPUT);
pinMode(swBoth, INPUT);
}
void loop() {
int i=100; // counter initialized with "done" value
if(digitalRead(indR)) {
i=0; //if indicators were reversed, the cycle needs to be reset to full 5s
while(digitalRead(indR) && i<100) {
i++;
if(! digitalRead(swBoth) ) {
digitalWrite(fogR, LOW);
digitalWrite(fogL, HIGH);
}
else {
digitalWrite(fogR, LOW);
digitalWrite(fogL, LOW);
}
delay(50);
}
}
if(digitalRead(indL)) { //same as right side
i=0;
while(digitalRead(indL) && i<100) {
i++;
if(! digitalRead(swBoth) ) {
digitalWrite(fogR, HIGH);
digitalWrite(fogL, LOW);
}
else {
digitalWrite(fogR, LOW);
digitalWrite(fogL, LOW);
}
delay(50);
}
}
if(!digitalRead(indR) && !digitalRead(indL)) { // no indicators currently on
if(! digitalRead(swBoth) ) {
if(i==100) { //neither indicators were on OR the 5s cycle is over
if(! digitalRead(swBoth) ) {
digitalWrite(fogR, HIGH);
digitalWrite(fogL, HIGH);
}
else {
digitalWrite(fogR, LOW);
digitalWrite(fogL, LOW);
}
}
else { //one or both indicators were on for less than 5s
while(!digitalRead(indR) && !digitalRead(indL) && i<100 && !digitalRead(swBoth) ) { //but not any more
i++; //finish the 5s cycle in the last foglight configuration
delay(50);
}
}
}
else {
digitalWrite(fogR, LOW);
digitalWrite(fogL, LOW);
}
}
}