That's the code:
float time;
const int redLed = 10;
const int yellowLed = 9;
const int sparkPin = 2;
int sensorValue = 0;
int lastSensorValue = 0;
void setup() {
Serial.begin(9600);
pinMode(redLed, OUTPUT);
pinMode(yellowLed, OUTPUT);
pinMode(sparkPin, INPUT);
}
void loop() {
int sensorValue = digitalRead(2);
float rpm = 0;
time = millis();
if (sensorValue == HIGH) {
if (sensorValue != lastSensorValue) {
rpm = (1/time)*60000;
Serial.println(rpm);
digitalWrite(redLed, HIGH);
if (rpm > 4000) {
digitalWrite(yellowLed, HIGH);
}
delay(1000);
time = 0;
}
}
digitalWrite(redLed, LOW);
digitalWrite(yellowLed, LOW);
lastSensorValue = sensorValue;
}
the circuit is attached (thanks to mister_rf to that)
The LEDs works all th time, but when the engine is running, the connection on serial port (with USB) is lost.
What's the problem??
