Water Rocket

Water rocket, with Arduino and a gyroscope accelerometer.
This rocket has a program which detects when it is in free fall, and when it detects it opens the parachute.
The rocket goes with the base (it is separate) can reach up to 50 meters high.

Materials:

• x1 Arduino Nano
• x1 GY-521 (gyroscope accelerometer)
• x1 SG90 (servo)
• x6 M3x8mm
• x6 M3 nuts

Code (Arduino):

#include

// Librerias I2C para controlar el mpu6050
// la libreria MPU6050.h necesita I2Cdev.h, I2Cdev.h necesita Wire.h
#include "I2Cdev.h"
#include "MPU6050.h"
#include "Wire.h"

// La dirección del MPU6050 puede ser 0x68 o 0x69, dependiendo
// del estado de AD0. Si no se especifica, 0x68 estará implicito
MPU6050 sensor;
Servo myservo;
// Valores RAW (sin procesar) del acelerometro y giroscopio en los ejes x,y,z
int ax, ay, az;
int gx, gy, gz;
int retardo= 0;

void setup() {
Serial.begin(57600); //Iniciando puerto serial
Wire.begin();

//Iniciando I2C

delay(1000);
sensor.initialize(); //Iniciando el sensor
myservo.attach(6);
myservo.write(0);
}

void loop() {
// Leer las aceleraciones y velocidades angulares
sensor.getAcceleration(&ax, &ay, &az);
sensor.getRotation(&gx, &gy, &gz);
float ax_m_s2 = ax * (9.81/16384.0);
float ay_m_s2 = ay * (9.81/16384.0);
float az_m_s2 = az * (9.81/16384.0);
float gx_deg_s = gx * (250.0/32768.0);
float gy_deg_s = gy * (250.0/32768.0);
float gz_deg_s = gz * (250.0/32768.0);
float a_tot = sqrt((ax_m_s2*ax_m_s2) + (ay_m_s2*ay_m_s2) + (az_m_s2*az_m_s2));
//Mostrar las lecturas separadas por un [tab]
Serial.print("a_tot ax y z gx y z:\t");
Serial.print(a_tot); Serial.print("\t");
Serial.print(ax_m_s2); Serial.print("\t");
Serial.print(ay_m_s2); Serial.print("\t");
Serial.print(az_m_s2); Serial.print("\t");
Serial.print(gx_deg_s); Serial.print("\t");
Serial.print(gy_deg_s); Serial.print("\t");
Serial.println(gz_deg_s);

if ((a_tot < 2) && (retardo > 500)){
Serial.println("====================");
Serial.println("FREEEE FAAAAAAALLLL");
Serial.println("====================");
myservo.write(90);
delay(1000);
//myservo.write(0);
//delay(1000);
}
retardo = retardo+1;
delay(10);

}

Al the pieces were printed with 5% gyroid PLA