Arduino Parking Sensor

1#define trigpin 12  //We need trig and echo pin for use HC-SR04 Sensor.
2#define  echopin 11
3#define clock 10 //Clock, latch and data pins are about 74HC595 shift  register
4#define latch 9 // We need to use this pins for our LED's 
5#define  data 8 //More details at: https://www.arduino.cc/en/tutorial/ShiftOut
6#define  buzzer 5 //We are using 1 buzzer for voice to get feedback betwwen obstacles and  us
7
8static int range; //We need this variables for use our Ultrasonic Sensor
9static  int Time;
10
11byte leds[]={0b10000000, 
120b11000000,
130b11100000,
140b11110000,
150b11111000,
160b11111100,
170b11111110,
180b11111111,
190b00000000  };
20//We need to assign our leds for how many from them will be working in the  range for between obstacles and us
21
22void setup()
23{
24  pinMode(trigpin,  OUTPUT); //This code is about what our pins are will be output or input
25  pinMode(echopin,  INPUT);
26  pinMode(buzzer, OUTPUT);
27  pinMode(latch, OUTPUT);
28  pinMode(clock,  OUTPUT);
29  pinMode(data, OUTPUT);
30}
31
32void loop()
33{
34  digitalWrite(trigpin,  HIGH);  //This area about our sensor codes
35  delayMicroseconds(1000); //More  details  at https://howtomechatronics.com/tutorials/arduino/ultrasonic-sensor-hc-sr04/
36  digitalWrite(trigpin, LOW);
37  Time = pulseIn(echopin, HIGH);
38  range = (Time/2)  / 29.1;
39//After from here we are setting which leds and buzzer will be active  at which range, you can change the ranges as you wish
40  if(range>=141){
41  digitalWrite(latch,LOW);
42  shiftOut(data,clock,MSBFIRST,leds[8]);
43  digitalWrite(latch,HIGH);
44  //We  are setting our leds off at over 141cm range 
45  }
46  if(range>=121&&range<=140){
47  digitalWrite(latch,LOW);
48  shiftOut(data,clock,MSBFIRST,leds[0]); //Which led  scnerio will be work in this range
49  digitalWrite(latch,HIGH);
50    bzzr(1000);  //our buzzer intensity in this range
51  }
52  if(range>=101&&range<=120){
53  digitalWrite(latch,LOW);
54  shiftOut(data,clock,MSBFIRST,leds[1]);
55  digitalWrite(latch,HIGH);    
56    bzzr(700);
57}
58  if(range>=81&&range<=100){
59  digitalWrite(latch,LOW);
60  shiftOut(data,clock,MSBFIRST,leds[2]);
61  digitalWrite(latch,HIGH); 
62    bzzr(500);
63}
64  if(range>=61&&range<=80){
65  digitalWrite(latch,LOW);
66  shiftOut(data,clock,MSBFIRST,leds[3]);
67  digitalWrite(latch,HIGH); 
68    bzzr(300);
69  }
70  if(range>=41&&range<=60){
71  digitalWrite(latch,LOW);
72  shiftOut(data,clock,MSBFIRST,leds[4]);
73  digitalWrite(latch,HIGH);
74    bzzr(200);
75  }
76  if(range>=21&&range<=40){
77  digitalWrite(latch,LOW);
78  shiftOut(data,clock,MSBFIRST,leds[5]);
79  digitalWrite(latch,HIGH); 
80    bzzr(100);
81  }
82  if(range>=11&&range<=20){
83  digitalWrite(latch,LOW);
84  shiftOut(data,clock,MSBFIRST,leds[6]);
85  digitalWrite(latch,HIGH);
86    bzzr(50);
87  }
88  if(range>=0&&range<=10){
89  digitalWrite(latch,LOW);
90  shiftOut(data,clock,MSBFIRST,leds[7]);
91  digitalWrite(latch,HIGH);
92    bzzr(1);
93  }
94 }
95
96void bzzr(int speed){
97  digitalWrite(buzzer,  LOW);
98  static unsigned long time=millis();
99  if(millis()-time >=speed){
100  time=millis();
101  digitalWrite(buzzer, HIGH);
102      }
103  } //This is buzzer  function. You dont need to know this for use the parking sensor.
104