Smart Central Lock

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Introduction: Smart Central Lock

About: I am an Electronics Engineer and hobbyist......I'm interested in work in robotics and automation, I make projects using Arduino and other hardware. I love to share things which I learn.

It feels awesome when you have the power to control things remotely.

Smart Central lock device for motorcycle (bike). by using this device you can control your bikes ignition lock. you can Lock/ unlock it remotely. Also can start and stop the engine by using your smartphone. So let's see how you can make one by yourself.

Step 1:

You need all the above mentions components to make this device.

Components Used: ...........................................................Buy Links

1- Arduino nano X1.......................................................... USA / INDIA

2- Bluetooth Module X1.................................................... USA / INDIA

3- 12V Relay X2................................................................ USA / INDIA

4- Capacitor 1000uF/25V X2............................................. USA / INDIA

5- 1K Resistors X2 ............................................................ USA / INDIA

6- Diodes 1N4007 X6........................................................ USA / INDIA

7- LM7805 X1 ................................................................... USA / INDIA

8- Transistors BC547 X2 .................................................. USA / INDIA

9- PCB X1......................................................................... USA / INDIA

Step 2:

now first solder all the components as per the circuit diagram on a prototype PCB. or you can design custom PCB as per the given circuit diagram. I recommend PCBWay.com for your prototype PCB fabrication.

Circuit Details:

Let's understand the circuit. starts from the input power supply. it needs 12volt DC power supply to operate. I added a Diode Bridge here to protect this circuit from reverse polarity. after that bridge, I Stepped down the voltage into 5 volts by using a linear voltage regulator IC LM7805. then its feed to Arduino nano and to the Bluetooth module. Bluetooth module connected with Arduino using Tx & Rx pins As Bluetooth's Tx pin goes to Arduino's Rx pin And Bluetooth's Rx pin goes to Arduino's Tx pin. transistor T1 And T2 Acting As Switch To control the Relay RLY1 & RLY2 respectively. the base of the transistor T1 is connected with the digital pin 5 of Arduino through a current limiting resistor of 1k. and the base of T2 is connected to digital pin 4 of Arduino.

Step 3:

After soldering All components. insert the Arduino nano to it and connect it with PC and upload the given program. Download program and all required Files Here

Step 4:

now connect the Bluetooth module with the circuit.

and solder all other wires For power input and to the output pins of the relay for starter and ignition control of the bike. and fit this all circuit assembly inside of an encloser box and close it. I am using a box made up from cardboard.

Step 5:

now its time to install it on a motorcycle. I installing it into my Hero Splendor Plus bike. the wiring diagram provided with this tutorial is tested with only Hero Splendor Plus, Hero Splendor Pro, Hero CD Delux. I am not sure if this wiring work with other bikes. to install it on other bikes rather than above mentioned you need to find out a starter relay of bike and pinouts of it. as well the ignition switch wiring of that bike on which you wish to install this device.

Let, s See how to install it on Hero Splendor Plus.

Open battery cover And Seat. and put this device in a suitable position where you find enough space for it. now combine yellow, Green and Red wire and connect them to the positive terminal of the battery. find the flasher relay. it is usually placed near to the battery bellow seat.

grab that 2 terminal relay and disconnect it from its wire harness. now connect ignition relay wire from our device that is yellow wire to the positive terminal of this connector. now a question arises here, that how to find out which one is the positive terminal? so to find out that take a piece of wire connect it's one end to the positive terminal of the battery and touch the other end of the wire to both ends of the relay harness. The ignition will be on when the second end of the wire is at any one terminal of the relay harness. The point at which the ignition is on is the positive point of the relay. now connect the yellow wire to that point and put back the flasher relay.

now connect the starter relay wire. for that search for start relay. in my case, it is placed under the fule tank. just remove it and find out the positive terminal of this relay also. now to find out this take a 12volt bulb attach one end of bulb to the negative terminal of the battery and second end of it to one of the ends of start relay harness. and press start button of bike. remember that while testing this you should have to turn on ignition using your keys. now on which point of relay harness bulb will glow that is the target point. now connect green wire into that point and insert back the start relay. and fix it on its position. now all done.

note: if you are not familiar with bike/motorcycle wirings please don't try it without the help of any bike mechanic. wrong wiring can burn your bike.


Step 6:

install the application from the given link. click here

Turn on Bluetooth, search for new device, click on HC-05. enter 1234/0000 if it asks for a password. 1234/0000 is the default password for HC-05, you can change this password by changing its setting. to know more about the Bluetooth module setting visit my previous tutorial. if you still not understand how to change that setting let me know in the comment box and I will make a short note on how to change the Bluetooth setting.

once you connected with device you are ready to operate Lock/Unlock ignition by sliding the switch on the app.

Sponsor link:

Utsource.net Reviews It is a trustworthy website for ordering electronic components with cheap price and excellent quality.

Hope you find this useful. if yes, like it, share it, comment your doubt. For more such projects, follow me! Support my Work and Subscribe to My Channel on YouTube.

Thank you!

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    20 Comments

    1
    rasamsettypranay13579
    rasamsettypranay13579

    Question 9 months ago

    my phone is connecting with Bluetooth to the hc05 module.but when i am pressing buttons like on/off and start in your app,i am not getting relay sound or triggering in the circuit and no(normally open)is not getting pkwer when we press any button.i made by seeing your circuit diagram and uploaded your code,but still the relay js not sounding.pls help me😩😵.pls reply and help me out of this problem.so that ill be thankful to you☺️

    20200909_014212.jpg
    0
    akhileshpagare29
    akhileshpagare29

    Answer 4 months ago

    Pls share mi the code

    0
    shubhamsuresh
    shubhamsuresh

    Answer 9 months ago

    check the circuit connections. make them correct. and it will be work fine. there is no problem in code or in Circuit diagram.

    0
    akhileshpagare29
    akhileshpagare29

    Question 4 months ago on Step 5

    Pls tell me does does Arduino nano requires code to run

    0
    rpranay13579
    rpranay13579

    9 months ago

    This is the video regarding the last question that is led is not glowing.plsssss give a solution.once observe the video

    0
    rpranay13579
    rpranay13579

    Question 9 months ago

    Sir,I have checked the Arduino Nano on bread board by connecting hc05 and led on d4,d5 pins.when I am pressing on or start button in the app the leds are not glowing .Is that a problem or not.pls reply sir.

    0
    rpranay13579
    rpranay13579

    Question 9 months ago

    What is the terminal (no or NC) where we have connected the positive terminals of the relays?i.e,I am asking the position of the relay in circuit diagram.and another doubt is when we press on button (or) start button in phone do we get the relay sound or if we connect to bike only it will get??here we are connecting 12v 1amp adapter instead of bike battery for checking purpose

    IMG_20200909_115204.jpg
    0
    rpranay13579
    rpranay13579

    9 months ago on Introduction

    What is the real connection?in video you have connected the green wire to NO and in the circuit diagram you have connected to NC in the relay

    IMG_20200907_185534.jpg
    0
    shubhamsuresh
    shubhamsuresh

    Reply 9 months ago

    follow the connections as in video

    0
    rpranay13579
    rpranay13579

    9 months ago on Introduction

    How to check whether the RF circuit is working or not without the bike.yellow and green wires are getting power or not

    0
    shubhamsuresh
    shubhamsuresh

    Reply 9 months ago

    just check if relay are activate/deactivate on pressing butons from app

    0
    rpranay13579
    rpranay13579

    10 months ago

    Can we control the bike as well as with the key when bt circuit is connected to the bike

    0
    shubhamsuresh
    shubhamsuresh

    Reply 10 months ago

    yes you can.

    0
    chipo22
    chipo22

    1 year ago

    Can this be used in an old car output (carburetor)

    0
    shubhamsuresh
    shubhamsuresh

    Reply 1 year ago

    Yes you can use it.....

    0
    chipo22
    chipo22

    Reply 1 year ago

    Sorry, in the Android application, can you give a password on the lock / unlock button?

    0
    shubhamsuresh
    shubhamsuresh

    Reply 1 year ago

    Heyy, It's a good idea. you can edit the app on MIT app inventor. I will share the source file for it soon.

    0
    chipo22
    chipo22

    Reply 1 year ago

    if you wish to provide the MIT app code please send us an email at usromun@gmail.com
    thank you

    1
    artworker
    artworker

    1 year ago

    Interesting! Pure genius!

    0
    shubhamsuresh
    shubhamsuresh

    Reply 1 year ago

    Thanks Man......!