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--- notes:c4eng:fall2022:projects:fso1 [2022/11/16 21:59] – [CIRCUIT] mward14
+++ notes:c4eng:fall2022:projects:fso1 [2022/11/17 14:07] (current) – [DEMONSTRATION] cmille71
@@ Line 13: / Line 13: @@
 ====OVERVIEW====
+#include <wiringPi.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <softTone.h>
+#include <stdlib.h>
+#include <math.h>
+#define rled    28
+#define yled    27
+#define buzzer  8
+#define trigPin 4
+#define echoPin 5
+#define MAX_DISTANCE 220        // define the maximum measured distance
+#define timeOut MAX_DISTANCE*60 // calculate timeout according to the maximum m$
+#define gled     1
+//function pulseIn: obtain pulse time of a pin
+int pulseIn(int pin, int level, int timeout);
+float getSonar(){   //get the measurement result of ultrasonic module with unit$
+    long pingTime;
+    float distance;
+    digitalWrite(trigPin,HIGH); //send 10us high level to trigPin
+    delayMicroseconds(10);
+    digitalWrite(trigPin,LOW);
+    pingTime = pulseIn(echoPin,HIGH,timeOut);   //read plus time of echoPin
+    distance = (float)pingTime * 340.0 / 2.0 / 10000.0; //calculate distance wi$
+    return distance;
+}
+int main(){
+    printf("Program is starting ... \n");
+    wiringPiSetup();
+    softToneCreate (buzzer);
+    float distance = 0;
+    pinMode(trigPin,OUTPUT);
+    pinMode(echoPin,INPUT);
+    pinMode(gled, OUTPUT);
+//    pinMode(buzzer, OUTPUT);
+    while(1){
+        distance = getSonar();
+        printf("The distance is : %.2f cm\n",distance);
+        softToneWrite(buzzer, 1000-distance*15);
+        if (distance>=20)
+        {
+                digitalWrite(gled, HIGH);
+        }
+        else
+        {
+                digitalWrite(gled, LOW);
+        }
+        if (distance<20)
+        {
+                digitalWrite(yled, HIGH);
+        }
+        else
+        {
+                digitalWrite(yled, LOW);
+        }
+        if (distance<10)
+        {
+                digitalWrite(rled, HIGH);
+                digitalWrite(yled, LOW);
+        }
+        else
+        {
+                digitalWrite(rled, LOW);
+        }
+        delay(10);
+    }
+    return 1;
+}
+int pulseIn(int pin, int level, int timeout)
+{
+   struct timeval tn, t0, t1;
+   long micros;
+   gettimeofday(&t0, NULL);
+   micros = 0;
+   while (digitalRead(pin) != level)
+   {
+      gettimeofday(&tn, NULL);
+      if (tn.tv_sec > t0.tv_sec) micros = 1000000L; else micros = 0;
+      micros += (tn.tv_usec - t0.tv_usec);
+      if (micros > timeout) return 0;
+   }
+   gettimeofday(&t1, NULL);
+   while (digitalRead(pin) == level)
+   {
+      gettimeofday(&tn, NULL);
+      if (tn.tv_sec > t0.tv_sec) micros = 1000000L; else micros = 0;
+      micros = micros + (tn.tv_usec - t0.tv_usec);
+      if (micros > timeout) return 0;
+   }
+   if (tn.tv_sec > t1.tv_sec) micros = 1000000L; else micros = 0;
+   micros = micros + (tn.tv_usec - t1.tv_usec);
+   return micros;
+}
 ====CIRCUIT====
@@ Line 193: / Line 291: @@
 {{:notes:c4eng:fall2022:projects:pi.jpeg?400|}}
-====DEMONSTRATION====
-=====PROJECT 7=====
+====Code====
+This LCD screen utilizes a library written in python so the code for the LEDs are as well. Python is very similar to C with only minor syntax differences for what is used for this project.
+the ''datetime.now()'' function will take the current time to the millisecond and apply it to a choses variable.
+''time = datetime.now()'' will set the variable "time" to the current system time from hours through milliseconds.
+Seconds can be isolated by simply putting ''.second'' at the end of the variable name. so ''time.second'' will be the isolated second value.
+=====Proximity Sensor=====
 ====OVERVIEW====
+Basically my fso1 was a distance sensor with a buzzer and light system. As you get closer the buzzer gets higher pitched If distance>30cm the green light was on and the buzzer was off. If distance<30cm the yellow light turned on and the green light turned off. If distance<10cm the red light turned on and the yellow light turned off.
 ====CIRCUIT====
+{{:notes:c4eng:fall2022:projects:20221110_105850.jpg?400|}}
 ====DEMONSTRATION====
+{{ :notes:c4eng:fall2022:projects:20221116_224819_202914968439831.mp4 |}}
 =====PROJECT 8=====
@@ Line 237: / Line 342: @@
-=====PROJECT 11=====
+==========Model Rocket Thrust Vector Control (TVC)============
 ====OVERVIEW====
+In this project, I used the Adafruit Gy-521 and two Servos. These electronics were used for the goal of making sure that a model rocket is properly orientated during its flight and guaranteeing a nominal trajectory for it.
-====CIRCUIT====
+The GY-521 is an accelerometer/gyroscope that will detect a change in the orientation of the craft as it is flying and will send a signal to the Arduino that the orientation of the craft is off. This will then send a signal to the servos that the orientation is off and needs to be fixed. Determining how much of a correction needs to be made is determined by a Proportional Integral Derivative (PID). A device that will automatically apply an accurate and responsive correction to a control function. This basically determines how fast/ intensely the servo responds to an error in the orientation of the device.
-====DEMONSTRATION====
 =====PROJECT 12=====

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