Introduction: Rotary Car Parking System

Picture of Rotary Car Parking System

It is simple to operate with the driver parking and leaving the vehicle in the system at the ground level. Once the driver leaves the incorporated safety zone the vehicle is automatically parked by the system rotating to lift the parked car away from the bottom central position. This leaves an empty parking space available at the ground level for the next car to be parked on. The parked car is easily retrieved by pushing the button for the relevant position number the car is parked on. This causes the required car to rotate down to ground level ready for the driver to enter the safety zone and reverse the car out of the system.

Except vertical car parking system all other systems use a large ground area, vertical car parking system is developed to utilize maximum vertical area in the available minimum ground area. It is quite successful when installed in busy areas which are well established and are suffering with shortage of area for parking. Although the construction of this system seems to be easy, it will be par from understanding without the knowledge of materials, chains, sprockets, bearings, and machining operations, kinematic and dynamic mechanisms.


  • Small footprint, Install anywhere

  • Less cost

  • Space for parking 3 cars can hold more than 6 to 24 cars
  • It adopts rotating mechanism so as to minimize the vibration and noise
  • Flexible operation
  • No caretaker is needed, key pressing operation
  • Stable and reliable
  • Easy to install
  • Easy to reallocate

Step 1: Mechanical Design and Parts

Picture of Mechanical Design and Parts

First the mechanical parts have to be designed and created.

I am providing with the design made in CAD and pictures of each part.

Step 2: Pallet

Picture of Pallet

Pallet is a platform like structure on which the car will stay or lift. It is designed in such way that all car is suitable for this pallet. It is made from mild steel plate and shaped in fabrication process.

Step 3: Sprocket

Picture of Sprocket

A sprocket or sprocket-wheel is a profiled wheel with teeth, cogs, or even sprockets that mesh with a chain, track or other perforated or indented material. The name 'sprocket' applies generally to any wheel upon which radial projections engage a chain passing over it. It is distinguished from a gear in that sprockets are never meshed together directly, and differs from a pulley in that sprockets have teeth and pulleys are smooth.

Sprockets are of various designs, a maximum of efficiency being claimed for each by its originator. Sprockets typically do not have a flange. Some sprockets used with timing belts have flanges to keep the timing belt centered. Sprockets and chains are also used for power transmission from one shaft to another where slippage is not admissible, sprocket chains being used instead of belts or ropes and sprocket-wheels instead of pulleys. They can be run at high speed and some forms of chain are so constructed as to be noiseless even at high speed.

Step 4: Roller Chain

Picture of Roller Chain

Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic,industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficientmeans of power transmission.

Step 5: Bush Bearing

Picture of Bush Bearing

A bushing, also known as a bush, is an independent plain bearing that is inserted into a housing to provide a bearing surface for rotary applications; this is the most common form of a plain bearing. Common designs include solid (sleeve and flanged), split, and clenched bushings. A sleeve, split, or clenched bushing is only a "sleeve" of material with an inner diameter (ID), outer diameter (OD), and length. The difference between the three types is that a solid sleeved bushing is solid all the way around, a split bushing has a cut along its length, and a clenched bearing is similar to a split bushing but with a clench (or clinch) across the cut. A flanged bushing is a sleeve bushing with a flange at one end extending radially outward from the OD. The flange is used to positively locate the bushing when it is installed or to provide a thrust bearing surface.

Step 6: ’L’ Shaped Connecter

Picture of ’L’ Shaped Connecter

Connects the pallet to rod using square bar.

Step 7: Square Bar

Picture of Square Bar

Holds together, the L shaped connector, bar. Thus holding the pallet.

Step 8: Beam Rod

Picture of Beam Rod

Used in pallet assembly, connecting pallet to frame.

Step 9: Power Shaft

Picture of Power Shaft

Delivers power.

Step 10: Frame

Picture of Frame

It is the structural body which holds the total rotary system. Every component like the assembly of pallet, motor drive chain, sprocket, is installed over it.

Step 11: Pallet Assembly

Picture of Pallet Assembly

Pallet base with beams are assembled to create individual pallets.

Step 12: Final Mechanical Assembly

Picture of Final Mechanical Assembly

Finally all pallets are connected to frame and motor connector are assembled.

Now it is time for electronic circuit and programming.

Step 13: Electronic Design and Programming (Arduino)

We use ARDIUNO for our program. The electronics parts which we use are given in next steps.

System features are:

  • The system consist of a keypad to take inputs (including calibrations).
  • The 16x2 LCD display input values and current position.
  • The motor is a stepper motor, driven by high capacity driver.
  • Stores data on EEPROM for non-volatile storage.
  • Motor independent (somewhat) circuit and program design.
  • Uses Bipolar stepper.

Step 14: Circuit

Picture of Circuit

The circuit uses an Atmel ATmega328 (ATmega168 also can be used, or any standard arduino board). It interfaces with LCD, keypad and Motor driver using standard library.

The driver requirements are based on the actual physical scaling of the rotary system. Torque required is to be calculated beforehand, and motor has to be selected accordingly. Multiple motors can be driven with same driver input. Use separate driver for every motor. This may be needed for more torque.

The circuit diagram and proteus project is given.

Step 15: Programming

It is possible to configure speed, individual shift angle for each step, set steps per revolution value etc, for different motor and environment flexibility.

Features are:

  • Adjustable motor speed (RPM).
  • Changeable Steps per revolution value for any bipolar stepper motor to be used. (Though 200 spr or 1.8 degree step angle motor is preferred).
  • Adjustable number of stages.
  • Individual shift angle for every stage (thus any error in manufacturing can be programatically compensated).
  • Bidirectional movement for efficient operation.
  • Settable offset.
  • Storage of setting, thus adjustment required in first run only.

To program the chip (or arduino), arduino ide or arduino builder (or avrdude) is required.

Steps to program:

  1. Download arduino bulider.
  2. Open and select the downloaded hex file from here.
  3. Select port and proper board (I used Arduino UNO).
  4. Upload the hex file.
  5. Good to go.

There is a good post at arduinodev about upload hex to arduino here.

Source code of project - Github source, you want to use Arduino IDE to compile and upload.

Step 16: Working Video

Step 17: Costing

Total costing was around INR9000 (~USD140 as per dt-21/06/17).

The component costing varies with time and place. So check your local price.

Step 18: Credits

Mechanical Designer and engineering is done by-

  • Pramit Khatua
  • Prasenjit Bhowmick
  • Pratik Hazra
  • Pratik Kumar
  • Pritam Kumar
  • Rahul Kumar
  • Rahul Kumarchaudhary

Electronics circuit is made by-

  • Subhajit Das
  • Parthib Guin

Software developed by-

  • Subhajit Das


vispatel701 (author)2017-10-23

can u plz provide me the calculation of this project..

What calculation?

Calclation related cost , load baring capacity , break even point ,

The mechanical par was not designed by me. I have partial cost list of mechanical equipment. I can provide that if you want. Same goes foe mechanical load calculation.

rania_abdulhadi (author)2017-10-06

HI, I don't get the idea of the HEX file . do you have an IDE sketch for the project or could you explain the point of the hex file please ?

HEX file is the compiled code, that is actually uploaded to the Microcontroller.

You can use the arduino builder to upload hex.

Or you could use the given arduino project code in Github source link provided.

maadafakar (author)2017-09-24

what app did u use to open the circuit(broken english)

Well if you are asking what software I used to create/open the circuit diagram, then it is "Proteus".

ty, but i cant open it using proteus 8.6

What file are you trying to open?

sorry, my proteus is broken(cracked), can i have the programing before the hex, need to learn more about prgraming

If you want the source code, then there is a github link already provided. Use Arduino IDE.

It is the .ino file.

eng_majdi83 (author)2017-08-23


Could you please the AutoCad drawing and the circuit design of your project to

Thank you

Unfortunately I can't. I do not have the original drawings.

efrancisg (author)2017-07-21


May I know if its possible to request for the complete autocad design of your project? Please communicate to me thru my email:


arpi_08 (author)2017-07-11

I m trying to make this project the programming part is not clear i have worked on arduino before the circuit diagram in proteus... i downloaded that file and tried to open in proteus it didnt open and the hex code from arduino builder how do we upload it to arduino. Can u pls help me out and give the detailed circuit along with code please.

Mohd nasrul (author)2017-07-10

Can i have full circuit drawing ? Email me at

The circuit given is the full circuit.

Yes you may have to adjust some parts if neccesary.

kufendi (author)2017-06-28

sory im noob..whats the use of HEX file?is it to make the arduino code?

Subhajitdas298 (author)kufendi2017-07-11

Don't worry.

HEX file is the compiled executable code. When you press test compile or upload, the arduino program is compiled and this hex file is created.

You can upload the hex directly using hex programmer.

BTW you can not create arduino code from hex.

I hope it clears out your doubt.

ZaiN1 (author)2017-03-02

sir can i have circuit drawing. email me at

Subhajitdas298 (author)ZaiN12017-06-21

Circuit drawing is given in this instructable already.

For any specific detail you can ask me.

ali kasem (author)2017-02-25

hi sir, could you please help me by sending me your autocad drawing file to my email

Subhajitdas298 (author)ali kasem2017-06-21

Autocad drawings weren't provided by the original authors. So sorry for that.

faiq.arch007 (author)2017-03-09

hi sir, could you please help me by sending me your autocad drawing file and mechanism to my email

Autocad drawings weren't provided by the original authors. So sorry for that.

wesamdaey (author)2017-03-28

can you tell me which steeper motor you have been used ?

is't Nema 17

and its holding torque pleas

Subhajitdas298 (author)wesamdaey2017-06-21

25 Kgcm.

Nikhilesh4295 (author)2017-06-02

Can u share the pdf

PDF is not generated by the authors. It is generated b the site.

Just save the whole page if you need it online.

Karlo Beglarishvili (author)2017-06-20

Guy, does anyone had made this project?

adzie66 (author)2017-03-27

sir can i have a circuit drawing. email me

Subhajitdas298 (author)adzie662017-03-27

Circuit drawing is given in step 14. Please view all step.

kufendi (author)2016-11-14

hello sir..please contact me on email

there is a lot i want to ask about the detail of hardware you are using

Subhajitdas298 (author)kufendi2016-11-14

Can you ask the questions here or via PM?

kufendi (author)Subhajitdas2982016-11-15

what sensor did you use in this project? how many of it? and where did you put of it? if u can put any image it will more helpful sir. tq for your time sir

kufendi (author)2016-11-08

hi sir, I need your help, could you please email me your autocad drawing file. Here is my email

Subhajitdas298 (author)kufendi2016-11-14

Sorry the mechanical design is not done by me.

The original autocad files belongs to the mechanical engineers.

Will reply you after asking them.



DishankP (author)2016-09-27

1)from where can we buy chain with that link from which can we easily assemble the trollies...??

2) what is estimated cost odf model ??

Subhajitdas298 (author)DishankP2016-10-22

Cost estimation will be posted within few days. Please wait.

aritrade123 (author)2016-09-27

hello sir this is aritra dey

can u please give me the drawing for the following .



What drawing do you want?

iamp2 (author)2016-08-12

Hi, I sent you an inquiry regarding this project.

Subhajitdas298 (author)iamp22016-08-26

yes what is it?

seamster (author)2016-06-30

This is a really interesting idea. Thanks for sharing!

Subhajitdas298 (author)seamster2016-07-05

Happy to help. Share if you like it.
And is source code necessasry?

Sir i need help ..

Yes? How may I help you. And no 'sir', ok.

The hex codes that i download is error into the arduino.

About This Instructable




Bio: Electronics and Telecommunication Engineer, Software Engineer, Hobbyist
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