servo gauge with arduino uno

:hi: :clap: hello everyone this place is awesome and very didactic. : I need you help to build a simple tachometer with a servomotor and arduino uno.
i read a lot of post but i can´t start to build this, i need your help. sorry for my english is a google translate :
pd:I apologize for my mistakes is my first post :yes:

And what do you need help with?

:hi: hello frakk, thank for your reply. will i need help with the program inside the arduino. i tell you . i copy other profiler file for x-sim and i think it works, the led rx blink fast. now for the arduino program i copy from the other proyects but not work nothing. any program with serial.begin and servo library makes the servo turn continuously and no reaction from x-simulator2 program. i think that is also misconfigured . i have a servo 360° and arduino uno. :yippiee: my dream is to build a simulator with motion with my hands but I have to get started learning how to assemble a servo tachometer. thanks for your time :thbup:

For arduino specific questions you have a better chance in the arduino forums. For Profiler specific questions you can search this forum, lot's of info on it. There are even arduino projects here.

:hi: At last I have a communication between the Arduino and x-simulator. I test this mount some leds as shiftlight with the rpm and pitlight with the speed but when I connect a servo motor that spins and spins until touch the throttle rpm gently and almost reach the maximum limit, the motor tends to stop and when he does turn it counterclockwise, then starts to shake and the arduino is showing off by displaying a writing error in serial port, but at least the LEDs work well :yippiee: please need your help. :
This is the arduino program:

#include <Servo.h>

Servo rpmservo;
Servo Speedservo;
int rpm;
int Speed;
char kind_of_data;

void setup(){

Serial.begin(115200);
pinMode(3, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
}
void loop()
{
while(Serial.available() > 0)
{
kind_of_data = Serial.read();
if (kind_of_data == 'R' ) Read_rpm();
if (kind_of_data == 'S' ) Read_Speed();
}

}
void Read_rpm(){
delay(2);
int rpm100 = Serial.read()- '0';
delay(2);
int rpm10 = Serial.read()- '0';
delay(2);
int rpm1 = Serial.read()- '0';

int rpm = 100*rpm100 + 10*rpm10 + rpm1;
analogWrite(9,map(rpm,127,255,0,253));
if (rpm >=250) digitalWrite(13,HIGH);
if (rpm <=250) digitalWrite(13,LOW);

rpmservo.write(rpm);
}
void Read_Speed(){
delay(2);
int Speed100 = Serial.read()- '0';
delay(2);
int Speed10 = Serial.read()- '0';
delay(2);
int Speed1 = Serial.read()- '0';

Speed = 100*Speed100 + 10*Speed10 + Speed1;
analogWrite(3,map(Speed,127,255,0,253));
if (Speed >=150) digitalWrite(12,HIGH);
if (Speed <=150) digitalWrite(12,LOW);
if (Speed >=155) digitalWrite(11,HIGH);
if (Speed <=155) digitalWrite(11,LOW);
if (Speed >=160) digitalWrite(10,HIGH);
if (Speed <=160) digitalWrite(10,LOW);
if (Speed >=165) digitalWrite(7,HIGH);
if (Speed <=165) digitalWrite(7,LOW);



Speedservo.write(Speed);

}

What is my fault?

use timer interrupt rather than delay(2) :yes:

hi kubing, how do this?

check your timer interrupt routine in arduino forum. I give you a key. then go to find a treasure :highfive:

The timer interrupts or delays have very little to do with the servo operation.

Look into the functions: analogWrite(9,map(rpm,127,255,0,253)); and rpmservo.write(rpm);

Look into example projects and try to get the servo working alone, with only a potentiometer for testing.

wish i have a time to help you. i can't find my old sample used for my old version of 2dof simulator. since big failure of my hardrive recently. I am busy with 32bit mcu system right now. Good luck fancrash.

: thank you very much kubing. :yes: