Home > Driving Displays, Driving Motors, Exploring Ideas > Arduino Parking Lot ( Filled )

Arduino Parking Lot ( Filled )

Wiring diagram:

Here is the code:

Arduining.com 08 JUL 2012
Code used in the production of the Youtube material.

#include <Servo.h>
Servo myservo;  // create servo object to control a servo

#define ServoM    12        //Connected to the servo motor.
#define Bright    11        //servo library disable PWM on pins 9 and 10.
#define Exit      9         //Pin connected to the EXIT button.
#define In        8         //Pin connected to the IN button.

#define BarLow    177       //Low position of the barrier.
#define BarUp     95        //Up position of the barrier.
#define CAPACITY  8         //Capacity of the parking lot.
#define INTEN     80        //Display intensity %

//Pins conections to segments (cathodes).
#define  segA  0
#define  segB  1
#define  segC  2
#define  segD  3
#define  segE  4
#define  segF  5
#define  segG  6

//Array with the segments to represent the decimal numbers (0-9).
byte segments[10] = {
// pgfedcba  <--- segments
  B00111111, // number 0
  B00000110, // number 1
  B01011011, // number 2
  B01001111, // number 3
  B01100110, // number 4
  B01101101, // number 5
  B01111101, // number 6
  B00000111, // number 7
  B01111111, // number 8
  B01101111  // number 9

void setup(){
  myservo.attach(ServoM);          // attaches the servo.

  pinMode(Exit, INPUT);           // set "EXIT" button pin to input
  pinMode(In, INPUT);             // set "IN" button pin to input
  digitalWrite(Exit, HIGH);       // Connect Pull-Up resistor.
  digitalWrite(In, HIGH);         // Connect Pull-Up resistor.
  myservo.write(BarLow);          //Barrier in the low position
//  delay(1000);

int  Available= 9;                    // Number of places available.

void loop(){
  if(Available != 0){
  if(Available != CAPACITY){

Put the segments according to the number.
void Display(int number){
byte segs =  ~segments[number];        //"~" is used for commom anode.

digitalWrite(segA, bitRead(segs, 0) );
digitalWrite(segB, bitRead(segs, 1) );
digitalWrite(segC, bitRead(segs, 2) );
digitalWrite(segD, bitRead(segs, 3) );
digitalWrite(segE, bitRead(segs, 4) );
digitalWrite(segF, bitRead(segs, 5) );
digitalWrite(segG, bitRead(segs, 6) );

See it in Youtube:

and how was done:

  1. Kim
    October 16, 2012 at 3:10 PM

    Nice! Why not use cap sense Library and use a small metallic plate at the entrance?
    Cheers Kim

    • October 16, 2012 at 9:35 PM

      Thanks, I’ll do some experiments using your idea.

    • LACIN
      May 17, 2016 at 9:18 AM

      if io want to use hc-sro 4( distance sensor) and LCD(LiquidCyrstal)
      how must i connect these to arduino
      how must i write codes??????????
      please help me …i will go to competition about arduino

  2. ghit86
    October 16, 2012 at 5:10 PM

    Goo job!

  3. Line96
    November 22, 2012 at 11:41 PM

    nice project. wanna ask, what material used to build the switch pad?

    • December 12, 2012 at 11:10 AM

      Aluminium foil, you can find it at the supermarket. Check the second video.

  4. December 19, 2012 at 6:26 PM

    Awesome project.

    Where did you get the servo rotor?

    • December 22, 2012 at 10:27 AM

      Amazon, Sparkfun, Robotshop, dealextreme, adafruit, Plolu, eBay,
      I have used all of them sucessfully…

    • Khalid
      April 15, 2017 at 4:01 AM

      Hi friend

      I want do it for 99 psrking with two seven segment
      How i can do it ??

  5. Maze1
    March 29, 2013 at 8:35 PM

    Nice Job!!! What kind of sensor did you use and how was it connected?

  6. March 31, 2013 at 7:25 AM

    hello can you email me the full program for your project im doing a similar project and I need some help

  7. April 16, 2013 at 1:26 PM

    Would it be possible to use two touch sensor for the entrance and exit?

  8. Márcia VR
    June 9, 2013 at 3:10 PM

    Gostei do seu projeto, mas fiquei com algumas duvidas… o material que vocẽ usou para colocar no piso do estacionamento é papel cartão?
    Estou iniciando meeessssmmmmoooo na área da robótica e preciso saber o nome dos pinos que você usou para plugar no clips…

    • June 9, 2013 at 4:14 PM

      Não falo muito portugués.
      -Yes is cardboard.
      -Look for “minigrabbers” in google images…
      Obrigado Márcia por visitar meu blog.

  9. Mc
    September 12, 2013 at 12:37 AM

    I don’t understand these lines…

    B00111111, // number 0
    B00000110, // number 1
    B01011011, // number 2
    B01001111, // number 3
    B01100110, // number 4
    B01101101, // number 5
    B01111101, // number 6
    B00000111, // number 7
    B01111111, // number 8
    B01101111 // number 9

    How to identify those “B00111111″???

    and this one” analogWrite(Bright,255*INTEN/100);”

    I hope you can somehow explain some lines on the code… I’m a newbie.

    • April 30, 2016 at 11:30 PM

      1234 – decimal number
      01234 – octal number
      0x1234 – hexadecimal number
      0b0101 – binary number

  10. September 12, 2013 at 2:58 PM

    An array of 10 bytes was declared and the name of the array is segments.
    byte segments[10] = { ….
    Then the array is filled with bytes in binary format (8 bits).
    The bit values correspond to the state of the segments a,b,c,d,e,f and g of the display to represent numbers from 0 to 9. Note that bit 7 is always 0 because the decimal point (p) is not used in this application.
    To change the intensity of the display, a PWM signal is used in the common of the display.
    “Bright” is the pin of the display where all the leds are connected (the common).
    when I said:
    #define Bright 11
    at the beginning of the code, it means that every time you see the word “Bright” in the code,
    it will be replaced by “11” before the code compilation.
    #define INTEN 80
    is used to change the display intensity.
    With this in mind:
    is the same as:
    The expression 255*INTEN/100 was used to specify INTEN as percentage.

    Hope it helps…

    • Leon Manuel Jimenez Soto
      May 9, 2014 at 9:38 AM

      thanks very much, you help me to!

    • don paulo
      March 6, 2015 at 11:49 PM

      is there a program for arduino uno using double seven segment display. i’m having a hardtime fixing my script.. please message me fast!

  11. October 28, 2013 at 4:15 PM

    hi there, could you do an example using a wireless RF remote

  12. October 28, 2013 at 4:16 PM

    love this project…so cool

  13. December 2, 2013 at 1:31 AM

    sir can we use a 16 segment led display in this project?

    • December 2, 2013 at 3:50 PM

      I see no problem with it. You’ll need the analog pins as digital outputs to drive all the segments.

      • December 3, 2013 at 8:12 PM

        how are we going to use that sir? sir can you give us the code that decreases the number of vehicle in the display everytime they exit?thank you sir more power

  14. December 9, 2013 at 6:29 AM

    sir can you please give us the materials and circuit diagram that you use in that project?thank you very much sir

  15. Denden
    January 15, 2014 at 1:42 AM

    hello, i have a problem with this part

    void loop(){

    it says ‘Display’ was not declared in this scope. what should i do?
    i just started using arduino TIA

    • Kamelio
      November 23, 2014 at 3:26 AM

      Could you solve your problem? I have the same trouble

      • November 26, 2014 at 6:41 PM

        Check that you have the function:
        void Display(int number){

        at the end of your sketch.

  16. nex
    February 4, 2014 at 5:11 AM

    Sir, i want to know the type of servo?

    • February 6, 2014 at 6:22 PM

      Hitech HS-55 or similar.

  17. May 17, 2014 at 7:16 PM

    que tipo de servomotor voy utlizar

  18. May 17, 2014 at 7:18 PM

    hello hear that type of servomotor is used

  19. murali
    July 18, 2014 at 3:15 AM

    instead of aluminium foil..,, can we replace with a push button switch..,,,???

    • July 18, 2014 at 3:30 PM

      Yes, actually the aluminium foil is acting as a switch.

      • September 8, 2014 at 11:02 AM

        Hello, what material used to build the switch pad?

  20. murali
    July 18, 2014 at 3:22 AM

    if we got to increase the number of cars in the lot (say 20)..,, what changes should me made.,, in program and displaying…,,

  21. Jeff Valerio
    July 29, 2014 at 3:29 AM

    Please reply, as I have problems with the 7 segment display, my 7 segment display is fully working but segment A or the upper segment is not lighting.

    I have reversed the code you used into:

    B1000000, // number 0
    B1111001, // number 1
    B0100100, // number 2
    B0110000, // number 3
    B0011001, // number 4
    B0010010, // number 5
    B0000010, // number 6
    B1111000, // number 7
    B0000000, // number 8
    B0010000 // number 9

    Using your schematic diagram with YOUR code, the lights are reversed, so I reverted the code into this, Because I’m using an anode 7 segment display. and its working but my problem is that the pin for segment A is not working. From my tests, the 7 segment display is working, my wires are working, the resistor is also working, the pins of the arduino are also working, Does disabling the PWM pins has something to do with this?

    Does this comment,

    //Pins conections to segments (cathodes).

    means the pin connection is for cathode only?

    Your fast reply is highly appreciated. Thanks in advance! 🙂

    • Nonamed
      October 9, 2016 at 7:41 AM

      Maybe wrong common anode or cathode verify

  22. Jeff Valerio
    July 29, 2014 at 3:32 AM

    PS.: Even with the 1s in the start of each array, (for the decimal point which is not in use in the code) the segment A or the topmost segment of the 7 segment display isn’t working. 😦 Please help. Thanks.

    • July 29, 2014 at 8:05 AM

      Try changing only the line:
      byte segs = ~segments[number];
      byte segs = segments[number];

    • February 14, 2017 at 1:47 PM

      dear same problem with my project if u removed this problem plz help me thanx in advance

  23. Leslie Ann Gonzales
    August 25, 2014 at 1:59 AM

    good afernoon sir, I’m curious about the aluminum foil. It is the switch pad right? How does it work? Can you explain how is it connected with the circuit. Thank you.

    • September 24, 2014 at 11:46 AM

      Common aluminum foil glued to cardboards.
      Minigrabber test leads to connected the paperclips to the Arduino.
      See the second video “The making…”

  24. Chinmay K
    September 16, 2014 at 11:30 AM

    Sir, can you please provide the sevro motor specifications.

    • September 24, 2014 at 11:29 AM

      The Hitech HS-55 was used in this project any standard or mini servo can be used, just do some experimentation to find the correct values to the UP and DOWN position of the barrier.

  25. murali
    September 24, 2014 at 9:14 AM

    dear sir,, i am murali. and I wonder if you can spare your precious time for me. We are doing this as our mini project. review seminars are on progress. if we may be asked a question like “why are you using arduino UNO only..?” what should we answer them..?
    please help us.. thanks in advance

    • September 24, 2014 at 11:25 AM

      Hi murali, you can use any Arduino compatible board like: UNO, Duemilanove, Leonardo, Due, Mini, NANO etc..

  26. Shazam
    October 1, 2014 at 9:07 AM

    I’ve encountered a problem. When the input is hold on 0 the count continuously decrease.

  27. October 28, 2014 at 5:33 PM

    what king of display did u used

  28. November 4, 2014 at 5:19 PM

    if I want to used 2 servos for this project one the entrance and the other one for the exit. would you tell me what kind of change I can do in the cade

    • November 26, 2014 at 6:45 PM

      It’s perfectly possible and a very good idea.
      You have to declare two servos:
      Servo barrierEntrance;
      Servo barrierExit;

      • asaad
        January 24, 2015 at 3:32 AM

        Hi dear
        Pls could you mention all the components that u used in this project
        With the specific name and details?
        Please i am waiting ur reply as soon as possible

  29. murali
    November 10, 2014 at 10:01 AM

    dear sir,, what are the limitations of this project??

  30. pooja parikh
    November 12, 2014 at 4:32 AM

    hallow sir, please send me a circuit operation and circuit diagram of this project

  31. murali
    November 12, 2014 at 12:49 PM

    Dear sir,. this is murali, We have completed this as our mini project. Today there was a expo, we have clearly demonstrated the project. During expo we came across with few situations

    1) The cars will be entering into the lot and the lot is filed. When the lot is filled, the vacant spaces are zero and no car is allowed to enter. Now, the power is gone. (we used adapter 12v, 1.5amps) and comes back. Then the seven segment display shows the maximum count, though the lot is filled. means the arduino is allowing the others cars to enter the lot.

    2) Now the another one, the car is ready to enter the lot. The car approaches the gate and gate opens up. Now the driver is in urgency and left. Though the car has not entered the lot, the count is decremented.

    3) Car reaches the gate, aluminium foil comes in contact and gate opens. Though the gate is open, the driver doesn’t enter. means when the aluminium foils are continue to remain in contact then the count keeps on decrements and after reaching zero the gate closes.

    4) when at a time two cars one after the other tries to enter the lot, then how can you prevent the overcrowding.?

    5) when two cars one leaves the lot and other enters, approaches the gate at same time. What will be the situation.?

    When we were asked questions, we were helpless and told them that this is a prototype version, if we are interested then we can go much deeper and come up with beautiful solutions.

    and we were are also asked

    6) when two aluminium foils come in contact, will arduino recieves a pulse or a electric signal.?

    7) How the arduino is providing 5v power suppy to servo motor.?

    8) Explain the architecture of arduino.?

  32. dj buena
    November 18, 2014 at 12:34 AM

    how an aluminum foil work?

  33. anz
    December 10, 2014 at 2:04 PM

    What sensors are used ?

  34. DEREK
    February 24, 2015 at 10:14 AM


  35. rachid
    March 23, 2015 at 11:37 AM

    hey sir,can I use mini srvomotor towerpro SG90 9G??

  36. pnn
    March 27, 2015 at 9:36 AM

    Hey, i want to connect the parking lot to a ultra sound sensor not a tipe of button, can you help pls?

  37. fade
    March 27, 2015 at 2:36 PM

    please i need the code

  38. April 19, 2015 at 11:15 PM

    What are the materials needed??

    • April 20, 2015 at 10:00 AM

      List of materials:
      -Arduino UNO
      -RC Micro Servo (Hitec HS-55 or similar)
      -7-Segment Display Common anode.
      -470 ohms resistors 1/4 w 5% (7)
      -Mini breadboard 170 points
      -cable jumpers Male-to-Male (14)
      -Solid wire AWG #22 (breadboard jumpers)
      -aluminum foil
      -paper clips (3)
      -Wooden Coffee Stirrer (the barrier)
      -White glue…

    • fade
      June 13, 2015 at 8:10 AM

      Can I do this project for 100 cars is not for … 8 cars will be on the amendment to the compiler code is not it? !

  39. April 21, 2015 at 9:15 PM

    What are the things you have used to attach with paper clip

    • April 22, 2015 at 12:49 AM

      Google: cable mini grabbers

  40. April 21, 2015 at 9:40 PM

    And send me the diameters of the base and the foil pad switch

  41. April 21, 2015 at 9:42 PM

    Can we use towerpro sg90 servo

    • April 22, 2015 at 1:03 AM

      towerpro sg90 servo is perfect.

  42. April 22, 2015 at 10:22 AM

    how yo made the foil switch

    • April 22, 2015 at 11:52 AM

      Cardboard and aluminum foil push pad:

      ********************* <—White glue
      ===================== <—Aluminum foil
      XXXXX……….XXXXXX <—Cardboard with the window
      ===================== <—Aluminum foil
      ********************* <—White glue

  43. April 22, 2015 at 10:23 AM

    can we use aligator wires

    • April 22, 2015 at 11:57 AM

      Good idea (don’t need the paperclips)

  44. April 30, 2015 at 1:17 AM

    is the cardboard of wood or paper

  45. unname
    May 3, 2015 at 1:09 AM

    Can i use towerpro mg996t digital servo..one more thing can i use 7 segment led common cathode??

  46. shreyas
    May 8, 2015 at 1:22 AM

    sir i am very much interested in your project
    can u pls provide us the ckt diagram
    how it is connected ????

  47. May 23, 2015 at 12:47 PM

    servo motor and display does not work at a same time…….Need help

    • May 23, 2015 at 1:53 PM

      If you are using a 9V battery, may be not enough to power the servo. Use the USB cable or an external power adapter.

      • May 24, 2015 at 1:55 PM

        i have use usb cable but it doesn’t work when servo motor start working the display get turn off and does not show decremented or incremented value……….kindly help me

      • May 26, 2015 at 4:16 PM

        Looks like your servo is a little big or is blocked..

  48. nik
    June 10, 2015 at 5:41 PM

    Cause when the car is left standing at the entrance down automatically display up to 0

    • June 10, 2015 at 8:16 PM

      Yes Nick, it’s a simple project with a lot of room to improve.

      • khadeijah
        September 14, 2015 at 9:38 AM

        I need some information for this idea , can you help me becouse i will write report about this idea

  49. Sharmae Sardido
    July 1, 2015 at 2:52 AM

    Nice sir… Good job

  50. riya01
    July 9, 2015 at 11:48 AM

    sir please help me for this project. from video i am not getting how you have connecting all the materials. like what’s the use of aluminium foil? I didn’t get that

  51. sajin ahamad
    July 12, 2015 at 2:38 AM

    Sir in diagram, what is the resistor do you use in seven segment display 470 ohm or 470 kilo ohm?

    • chevi
      July 12, 2015 at 2:06 PM

      470 ohms

  52. chevi
    July 12, 2015 at 2:08 PM

    Hi, could you tell me how switch pad works? and… when two aluminium foils come in contact, will arduino receives a pulse or an electric signal?. Thanks for your help,

  53. Joshua Navarro
    July 30, 2015 at 1:01 AM

    good day sir.. may i ask. i can’t understand the lines:

    #define BarLow 177
    #define BarUp 95

    what is the significance of 177 and 95? or why 177 and 95? can we give another values? thank you in advance for your response.

  54. September 13, 2015 at 9:41 AM

    how we can know about components range

  55. khadeijah
    September 14, 2015 at 9:26 AM


  56. khadeijah
    September 14, 2015 at 9:33 AM

    I need some information for this idea , can you help me becouse i will write report about this idea

  57. October 12, 2015 at 2:52 AM

    Hi, Sir. What if we want to use a double seven segment so we can have atleast 99 cars in it. What changes will we make in the program? Thanks. Hoping for your reply.. ASAP.

  58. sukhdeep
    November 5, 2015 at 6:17 PM

    hi sir we are making similar project by using arduino UNO, rfid, servo and lcd 16*2 to display. What code do we need for lcd to display ? Or we just need thid code for servo motor. I am completely new to hardware.

  59. sukhdeep
    November 5, 2015 at 6:19 PM

    sir we are using lcd 16* 2 and rfid along with servo and arduino. we are not using resistors. What code do we need for lcd display ?

  60. Oliver
    November 28, 2015 at 6:18 PM

    Hi great project, just a small question.
    For a GCSE project I’m doing a similar design to yours in that a car enters the no. Of available spaces lowers and when a car exit it rises. I’m also using the arduino however my project will also display and count disabled drivers entering and exiting the car park. I hope to run two arduinos, one for standard drivers and one for disabled both boards will be connected to exit and entrance switches and 7 segment displays. Here’s the question, would it be possible to connect both boards (coded the same) to the same single servo motor.

  61. akshay
    December 11, 2015 at 9:25 PM

    can you send me the schematic of the circuit of breadboard of 7 segment display

  62. Shivam katial
    December 14, 2015 at 1:10 PM

    i am not able to figure out, how u made the switch button using aluminium foil. can u plz help me out sir?

  63. Danijean Tulalian
    January 6, 2016 at 7:12 PM

    Can I ask if what programming language did u used?

  64. Kim
    January 11, 2016 at 9:34 AM

    Can we have your research papers about this.,? Thank you and Godbless

  65. KAMAL
    January 25, 2016 at 5:34 PM

    Please the programm of a parking with the servo motors ( one for tthe in & one for the out) it’s same working like ur programm

    January 26, 2016 at 4:05 AM

    which component is requied for this project ?

  67. souhaila
    January 27, 2016 at 9:06 AM

    im using photoresistor to detect the presence of a car , but i didn’t know how to connect it via the aluminium foil , and i didnt know also where your buttons are in you shema ???

  68. February 4, 2016 at 11:59 AM

    I created the whole project. the numbers work perfect. As i was having problem with Servo overloading the arduino so googled and solved it by attaching an external source with a common ground between the arduino and the servo motor.

    I tried this configuration with a Sweep program and it works perfect.

    But with the parking lot program it keeps rotating till the car hits the circuit whether in or out. When the car hits the circuit it still rotates but at a much lower speed. then after 3 secs it again gains the previous speed.

    The servo never stops. The numbers work perfect but servo is giving me headache…
    I have a feeling the programming might need tweaking
    Please help…..

  69. sam
    February 21, 2016 at 11:00 AM

    please anyone send me more details about this project to this mail srnarendra100@gmail.com plz…

  70. fabio
    March 4, 2016 at 10:29 AM

    ola, como metes a cancela a levantar, nao se percebe muito bem


  71. Nikhilesh Vyas
    March 11, 2016 at 10:34 PM

    can you tell me if i want to use in and exit as a separate door then how to attach a another servo motor to it??
    please help me i need it As soon as possible.

    March 21, 2016 at 7:44 AM

    What are the components required to make ur CAR PARKING LOT Project ?
    I want Details about Switch Pad experiments works with arduino uno.

  73. April 5, 2016 at 9:13 PM

    hi sir i am Wilson, can i have to full component list of this project? as i’m doing something similar to this for my final year project. will be much appreciated if helped thanks 🙂

  74. April 5, 2016 at 9:16 PM

    great project by the way !

    April 7, 2016 at 1:58 PM

    Hola quisiera saber por que no prenden el 7 segmentos algunos segmentos encienden otros no :c, usted utilizo anodo comun o catodo comun?

  76. Anem
    April 15, 2016 at 12:00 AM

    How can I use double digits, for a bigger parking lot?
    Help please

      September 16, 2016 at 12:00 PM


  77. April 15, 2016 at 12:07 AM

    could any body can help me in understanding the specification of this project . like output power, input power,current ,voltge used etc….

  78. sameh
    May 4, 2016 at 11:26 AM

    Hi there !

    You did a great job !
    I am new to Arduino and I don’t understand this part . If you help me , it would be much appreciated .

    void Display(int number){
    byte segs = ~segments[number]; //”~” is used for commom anode.

    digitalWrite(segA, bitRead(segs, 0) );
    digitalWrite(segB, bitRead(segs, 1) );
    digitalWrite(segC, bitRead(segs, 2) );
    digitalWrite(segD, bitRead(segs, 3) );
    digitalWrite(segE, bitRead(segs, 4) );
    digitalWrite(segF, bitRead(segs, 5) );
    digitalWrite(segG, bitRead(segs, 6) );

    Thank you !

  79. May 5, 2016 at 4:07 PM

    utilizo display de anodo comun o catodo comun?

  80. Marco Antunes
    May 6, 2016 at 4:25 PM

    No meu projeto passado pouco tempo a contagem começa de novo. Alguem me pode ajudar? obrigado

    In my last project soon the count begins again. Someone can help me? thank you

  81. Marco Antunes
    May 7, 2016 at 5:09 AM

    In my last project soon the count begins again. Someone can help me? thank you

  82. LACIN
    May 17, 2016 at 9:13 AM

    if i want to use hc-sro 4( distance sensor) and LCD(LiquidCyrstal)
    how must i connect these to arduino
    and how must i write the codes???????
    please help me….

  83. Sharven Ravendran
    May 21, 2016 at 9:04 AM

    hi sir , i would like to use a pir sensor instead of aluminium foil . how am i suppose to change the coding..thank you

  84. ali
    May 23, 2016 at 5:56 AM

    sir, what program should i write to test the display separately?

  85. haider khan
    June 1, 2016 at 12:19 PM

    should i connect the seven segment display the way its described? because online when i looked up it was giving me diff pins

  86. haider khan
    June 1, 2016 at 12:20 PM

    do i have to have a switch pad in order for it to work?

  87. Ch.Rahul
    June 13, 2016 at 12:26 AM

    Sir, im planning to do this as my mini project. Currently im using Arduino software for program execution but im not getting any output. Kindly mail me your code. Your help will be very valuable. If not arduino, keil code will also be helpful. Thank you.

  88. June 13, 2016 at 1:46 AM


  89. sanjana
    July 24, 2016 at 2:44 AM

    can u please tell me where are you connecting the switchpad wires in the arduino?

  90. hansen
    August 3, 2016 at 6:41 AM

    Can you please tell me the names of components used??
    Please mail me the components required

  91. hansen
  92. Aashutosh
    September 2, 2016 at 9:53 PM

    Hi Iam going to try this circuit and the common anode display is not available so can I use the common cathode display ??? and if I can then how could I do please send me a feedback.

    • September 4, 2016 at 9:16 PM

      Connect the display’s common to 5V and change the line:
      byte segs = ~segments[number]; //”~” is used for commom anode.
      To this:
      byte segs = segments[number]; // “~” was removed for commom cathode.

  93. Parindi
    September 26, 2016 at 1:11 AM

    Can you please send the circuit diagram of the parking system using aurdino with the sensors we are not getting the perfect circuit diagram of it please send the circuit diagram using ATMEGA32 send as fast as possible I need within this week.

  94. Riddhi
    October 11, 2016 at 11:42 PM

    What is the working principle behind it ?? Explain briefly

  95. Riddhi
    October 13, 2016 at 7:31 AM

    What is the working principle behind parking lot system? Explain in detail

  96. RKV
    October 31, 2016 at 7:44 AM

    what will be the changes if we use common cathode in place of common anode display, and plese give the code for the same.

  97. sanat
    November 4, 2016 at 8:11 AM

    hello sir,i am a class 8 student .i am facing problem with the connection with the common anode display.can you plz tell me what is pwm.plz sir, i have to submit it within 16 days

    • November 4, 2016 at 7:16 PM

      PWM is Pulse Wide Modulation, can be usen to change the display intensity.

  98. sanat
    November 5, 2016 at 10:21 AM

    but can you plz tell me which pin is pwm pin

  99. November 16, 2016 at 6:31 PM

    Good day sir.. may i know the different types of materials did you use on this project.

  100. satwi
    December 3, 2016 at 11:53 AM

    sir,which version of software should we use to run this code?

  101. sedlarka
    December 11, 2016 at 3:30 PM

    Can I ask some question? I have a problem with segment led display because it blinks or each segments shine not as they should. Do you know where could be a problem?

  102. sindhu
    January 3, 2017 at 5:17 AM

    can we use lcd in place of led if it possible please give me source code

  103. syaililek
    January 11, 2017 at 10:55 PM

    Why our 7 segment display is not changing number either decreasing or increasing…please give some feedback…tq

  104. suha
    January 16, 2017 at 3:07 AM

    hello. im suha. im using your project for my mini project assignment. but the software not run and the 7 segment does not display the number. why?

  105. blooosh_93
    January 23, 2017 at 2:10 AM

    hi sir
    if i want to increase the number of parking’s

    what change i have to do…

    in code and components ?

  106. Taranjeet Singh
    January 23, 2017 at 11:45 AM

    Hello Sir, I am pursuing Diploma(6th sem) and I have to submit a major project so I think this is a best project which can I present in College.1:-I have to ask that the code which you written above is error free or not? & 2:- Which version of Arduino Software you used for write the code?
    Plese sir reply me as soon as possible.

  107. January 26, 2017 at 3:11 AM

    hey what software that you use to draw / simulate the program ? Sorry bad english

  108. Afiq
    February 7, 2017 at 2:08 PM

    Hello sir, i’ve watch your project on youtube and what i could say is it is awesome and great. I’ve taken the idea of your project as my final year project in my last semester. So i have a few inquiries. First, can i change the arduino atmega328P to arduino mega2560 and would the program still be the same or tottaly gone wrong? Second, you’ve showed the real diagram of the connection. But can you email me the schematic diagram that you create on proteus? I can’t figure out the connection due to less recognition of the pin on atmega328P. And lastly, the coding you’ve given above, is it where you placed it in the atmega328P? I hope to hear from you as soon as possible, because i need to send my final draft on 16 Feb 2017. I really need your help. Thankyou for your kindness . Email me at afiqrazak97@gmail.com

  109. February 14, 2017 at 7:04 AM

    hello sir i taken ur project as a semester project but project is perfectly working but the segment A and B is not lighting please help me…

  110. hassan ben khajjou
    February 16, 2017 at 4:03 PM

    Is what you can give me the report of this project

  111. February 18, 2017 at 12:12 PM

    Forgive I need help with this project at the moment of connecting the whole monitor does not work for some reason I do not know the numbering is left all the segments on and does not change when using the sensor

  112. abcd
    February 19, 2017 at 11:55 PM

    What is value of resistor . 470 ohm or kohm ?

    • Alex
      March 4, 2017 at 9:52 AM

      470 ohm ,he said

  113. Alex
    March 4, 2017 at 9:55 AM

    Hi.I like your project. can you send me a tutorial of how can i realize the connections? thank you so much. And one more thing. What programming language did you use in your project?

  114. Dylon
    March 6, 2017 at 10:24 AM

    Sir where we can buy all of this materials? Where can we find tha pcb? Thanks in advance

  115. TUSHAR
    March 24, 2017 at 2:26 PM

    I am working on a project of intelligent transportation system, and for the toll gate i want to make a boom barrier using arduino uno and a servo motor, but i am not getting codes for it. can anyone help me out for this?

    code must have a simple two ultrasonic or PIR sensor one for opening the barrier and other for closing the same.
    And please provide me with a circuit diagram too.

  116. Pablo Mejía
    April 18, 2017 at 6:37 PM

    Buenas tardes me puedes enviar un correo o con la programación que usaste, trato de compilar pero me marca errores en los símbolos “!”

  117. Adrián Salazar
    April 18, 2017 at 10:18 PM

    Me podrías pasar la programación a mi correo? Gracias

  118. Duje Kovačević
    April 25, 2017 at 2:43 AM

    Materials used to create touchpad????

  119. April 26, 2017 at 7:41 PM

    it doesn’t work,even on circuits.io

  120. April 27, 2017 at 11:26 AM

    i am working on this project. but the code is not complete. when ever i give suply to arduino . the barrier pull up with out the car .. please help me. its my semester project

  121. Dalia
    May 1, 2017 at 5:28 AM

    I just wanna to ask about the kind of this senosor and what is the circuit digram that connects sensor with the project ?

  122. nadhrah irdina
    May 3, 2017 at 9:39 AM

    hello sir, can u help me?my servo motor is functioning well but my 7 segment is not decreasing..I just want to know either any connection that I miss from your schematic diagram?

  123. josue
    May 7, 2017 at 10:42 PM

    Good work,
    I would like to know what materials you used in this project. Thanks

  124. maike
    May 9, 2017 at 11:09 PM

    What materials were used?

  125. Marty Mtonga
    July 11, 2017 at 7:28 AM

    Could you help me know where i can find the pressure pad sensor. I cant seem to find it on online sites. Help?

  126. janani
    July 31, 2017 at 11:36 PM

    to which pin number of the arduino , the aluminum foil wires for parking slots should be connected sir. Urgent sir.
    pls reply us at the earliest .Thanks in advance !

  127. satanang
    August 17, 2017 at 7:42 AM

    Good but we need some explanation

  128. Gli De
    September 3, 2017 at 2:48 AM

    if i want to use LDR and LCD(LiquidCyrstal)
    how must i connect these to arduino
    how must i write codes??????????
    please help me …

  129. Atiq
    September 11, 2017 at 9:00 AM

    Hye ,,can i get full of schematic?

  1. October 15, 2012 at 1:45 AM
  2. October 15, 2012 at 2:34 PM
  3. October 15, 2012 at 3:14 PM
  4. October 16, 2012 at 12:35 AM
  5. October 17, 2012 at 1:08 AM
  6. January 20, 2013 at 7:08 AM
  7. July 15, 2015 at 2:01 AM
  8. April 18, 2017 at 5:37 AM

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