Headlight control

Using Arduino Programming Questions
41

Yes this is exactly what i need but i need to make sure during that transition between state 2 and 3 when both high and low beam inputs are low that the low beams stay on

const byte powersenseIn = 9;
const byte highbeamIn = 10;
const byte lowbeamOut = 11;
const byte highbeamOut = 12;

void setup()
{
  pinMode (powersenseIn, INPUT_PULLUP);
  pinMode (highbeamIn, INPUT_PULLUP);
  pinMode(lowbeamOut, OUTPUT);
  pinMode(highbeamOut, OUTPUT);
}

void loop()
{
  if (digitalRead(powersenseIn) == HIGH)    //if the headlights are on
  {
    digitalWrite(lowbeamOut, HIGH);  //turn on low beam
    if (digitalRead(highbeamIn) == HIGH)  //if high beam selected
    {
      digitalWrite(highbeamOut, HIGH);  //turn on high beam
    }
  }
  else  //headlights are off
  {
    digitalWrite(lowbeamOut, LOW);  //turn off low beam
    digitalWrite(highbeamOut, LOW);  //turn off high beam
  }
}

You will need to ensure that the input voltages are between 0V and 5V, that not more than a few milliamps is taken from the outputs and that the Arduino is supplied with a stable voltage that contains no spikes.

I still think that it is a waste of an Arduino.