Aircores & Ardurino Controller

you cant avoid delay with serial read in arduino

in 115200 you need 1ms on each byte

i just got an opel corsa only speedometer tacho and i am working on it write now

Then prepare to waste about 95% of the processing time.

I'm using 9600 baud speed because of the lcd refreshing to fast
maybe that I will implement a delay in the lcd subroutine, so I can use higher baud speed.

i've got my 2 Devantech MD03
And i'm playing with them right know, it was very easy to set up and the code was as simple as the blink sketch :rofl:
it builds up speed in both directions and then switch.

Code:

/*
 Fading
 
 This example shows how to fade an LED using the analogWrite() function.
 
 The circuit:
 * LED attached from digital pin 9 to ground.
 
 Created 1 Nov 2008
 By David A. Mellis
 Modified 17 June 2009
 By Tom Igoe
 
 http://arduino.cc/en/Tutorial/Fading
 
 */


int pwmPin = 2; int pwmPin2 = 3;    // LED connected to digital pin 9
int dirPin = 52; int dirPin2 = 53;

void setup()  { 
     pinMode(pwmPin, OUTPUT);   pinMode(pwmPin2, OUTPUT);     
     pinMode(dirPin, OUTPUT);   pinMode(dirPin2, OUTPUT);         
} 

void loop()  { 
     digitalWrite(dirPin, LOW);   // set the LED on
   digitalWrite(dirPin2, HIGH);   // set the LED on
  // fade in from min to max in increments of 5 points:
  for(int fadeValue = 0 ; fadeValue <= 255; fadeValue +=5) { 
    // sets the value (range from 0 to 255):
    analogWrite(pwmPin, fadeValue); 
    analogWrite(pwmPin2, fadeValue);      
    // wait for 30 milliseconds to see the dimming effect    
    delay(30);                            
  } 

  
   digitalWrite(dirPin, HIGH);   // set the LED on
   digitalWrite(dirPin2, LOW);   // set the LED on
  
  
    // fade in from min to max in increments of 5 points:
  for(int fadeValue = 0 ; fadeValue <= 255; fadeValue +=5) { 
    // sets the value (range from 0 to 255):
    analogWrite(pwmPin, fadeValue); 
    analogWrite(pwmPin2, fadeValue);      
    // wait for 30 milliseconds to see the dimming effect    
    delay(30);                            
  } 
                     
  }

So now I'm figuring out how to put the potentiometers on the motors so i can start with positioning them, maybe i will use the servos that I have.

which is the the frequency for a pwm speedometer for 0kmh and wich for 200kmh?

thanks

http://www.youtube.com/watch?v=uz9uxnqRG0c

i paid 50€ for this

very expencive

With frequencies?? 0-300 hz?? How did you find the original power inputs?

I have a nissan Primera P11 cluster and I can't find anything online about the back connection harness... I traced some pins and spotted GND and possible some power inputs... didn't dare yet to fire it up... lol

it haw symbols
+ and -

-----------------------------

how my output should be

????/


i cant drive it

i mean

i have to set a standart pmw frequency

and then change tha duty cycle?

for each speed?


thnaks

I believe your Corsa cluster works with frequency (old technology) not with CAN-network like new ones. The meters may be aircore driven with dedicated chips in the cluster.
So what you need to position it correctly, is to use a timer that outputs certain frequency from 0Hz to 300 Hz... I still experimenting with timers but for now you can try using the tone command library: http://arduino.cc/en/Reference/Tone

On the video you apply PWM to the inputs of the cluster or directly on the meters? I ask because I also see the odometer increasing that means it counts pulses like from the real car axle!

Thanos

i give a pwm at the input of the cluster

so the old tecnoliogy requires a 50% duty cylce pwm with variable pwm?

or maybe 3.000 Hz?

now its working on 0-1000

i hate the opel

Re: Custom dashboard-stepper motor / LCD / servos / 7-Seg / leds

Sry but you dont have 12 pwm


run the fade example code

on pin 12

and check the led on pin 13

http://www.youtube.com/watch?v=0ZA4JEYDL6I

ok no more hand PWM

the pwm pulses are from 0Hz to 1KHz 50% duty cycle

i can set it from 7km/h to 200+ km/h

It does not have a low fuel lamp

who made it?

actual every pwm pin en digital pin can be used as pwm with the inbuilt timer.
and every pwm pin can be used as digital output.

Code:

void setup()
{
  pinMode(13, OUTPUT);
}

void loop()
{
  digitalWrite(13, HIGH);
  delayMicroseconds(100); // Approximately 10% duty cycle @ 1KHz
  digitalWrite(13, LOW);
  delayMicroseconds(900);
}

a bit dirty, but it works

yes i had done the same to test the speedometer

for a reason it was not as good as the tone

but with the above you can have a pwm for limmited time

for example (A copy paste code that i have write on the arduino forum)

Ok lets feef a led on pin 50 on mega with 2.5V

void loop{

digitalWirte(50,HIGH);
delay(2);
digitalWrite(50,LOW);
delay(2);

//do other things here


--------------------------------

so we feed the led only once for each loop

we will have 5V on pin 50 for 2ms and then nothing untill the loop ends and starts over again

but if you write analogWrite(3,127);

then you can do other things and the led run on 2.5V

yeah the duty cycle will not work then.

http://www.youtube.com/watch?v=1ZozGny2BRc

awesome :yourock:

did you use the l293d

nop only npn transistors