Earlier on I posted in the "Motors, Mechanics, and Power" part of the forum because I was having a spot of bother with my instrument cluster that I'm trying to make for LFS.
My problem was that only one of the instruments would work at a time and it all depended on which part of information the Arduino received first.
I discovered after a quick google search that the Arduino can only output one "Tone" at a time, and I was trying to output two. That's why it didn't work, and so, I'm using tone for the speedo (because I know how I can make the Tone "command" work accurately) and "analogWrite" for the rev counter, however the rev counter doesn't really work, when I activate the X-Sim it just makes the needle go to its maximum and stay there, unless i set the value 100% correct, then it stays at below zero when the engine is off, however when I turn the engine back on it sends it flying to its maximum again.
If I then proceed to do full throttle ingame and just let it drop from max to zero (ingame), the rev counter (on the cluster) will drop by just a few RPM at a few points.
Kind of difficult to explain, tried my best. If anyone want's some screenshots and/or the code to see for yourself let me know 
There is a third-party Tone library that will allow multiple simultaneous tones on different pins.
http://code.google.com/p/rogue-code/wiki/ToneLibraryDocumentation
Well, I didn't get around to try until today, but I am kind of wondering, how one would go about to add this to the code, as I'm using Herctrap's code, I don't really know how I'd implement that tone library into the code.
If anyone knows, here's the code, if you would know how to, any help is very much appreiciated!
int rpm;
int i;
int leds;
int Speed;
int fuel;
int ebrake;
int brake;
int fuelled;
int Turbo;
int gear;
int previous_potion = 0;
int rotate;
char kind_of_data;
void setup(){
Serial.begin(115200);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(5, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(10, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
}
void loop()
{
//****************************** READ DATA FROM SERIAL ******************************
while(Serial.available() > 0)
{
kind_of_data = Serial.read();
if (kind_of_data == 'R' ) Read_Rpm();
if (kind_of_data == 'S' ) Read_Speed();
if (kind_of_data == 'F' ) Read_Fuel();
if (kind_of_data == 'E' ) Read_EBrake();
if (kind_of_data == 'B' ) Read_Brake();
}
//****************************** READ DATA FROM SERIAL END ******************************
}
void Read_Rpm(){
delay(1);
int Rpm100 = Serial.read()- '0';
delay(1);
int Rpm10 = Serial.read()- '0';
delay(1);
int Rpm1 = Serial.read()- '0';
int rpm = 100*Rpm100 + 10*Rpm10 + Rpm1;
analogWrite(5,map(rpm,8,128,2,128));
}
void Read_Speed(){
delay(1);
int Speed100 = Serial.read()- '0';
delay(1);
int Speed10 = Serial.read()- '0';
delay(1);
int Speed1 = Serial.read()- '0';
Speed = 100*Speed100 + 10*Speed10 + Speed1;
tone(9, map(Speed,128,255,19,259));
}
void Read_Fuel(){
delay(1);
int Fuel100 = Serial.read()- '0';
delay(1);
int Fuel10 = Serial.read()- '0';
delay(1);
int Fuel1 = Serial.read()- '0';
fuel = 100*Fuel100 + 10*Fuel10 + Fuel1;
analogWrite(2,map(fuel,127,255,53,183));
if (fuel<135) digitalWrite(10,HIGH);
if (fuel>135) digitalWrite(10,LOW);
}
void Read_EBrake(){
delay(1);
int EBrake100 = Serial.read()- '0';
delay(1);
int EBrake10 = Serial.read()- '0';
delay(1);
int EBrake1 = Serial.read()- '0';
ebrake = 100*EBrake100 + 10*EBrake10 + EBrake1;
if (ebrake>200) digitalWrite(3,HIGH);
if (ebrake<200) digitalWrite(3,LOW);
}
void Read_Brake(){
delay(1);
int Brake100 = Serial.read()- '0';
delay(1);
int Brake10 = Serial.read()- '0';
delay(1);
int Brake1 = Serial.read()- '0';
brake = 100*Brake100 + 10*Brake10 + Brake1;
if (brake>200) digitalWrite(5,HIGH);
if (brake<200) digitalWrite(5,LOW);
}
LifeRunner:
Anyone?
You don't describe what you want the code to do. Kind of hard to make recommendations without knowing the goal.
johnwasser:
LifeRunner:
Anyone?
You don't describe what you want the code to do. Kind of hard to make recommendations without knowing the goal.
I want to add the library you linked me to the code, making the speed and RPM both run off tones, if it's possible 
Couldn't figure how to add an instance in such a way that it would work :l