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Make a Remote Controlled Toy Car Circuit

The market may be full of these hi-end remote controlled toy cars, but for a hobbyists making one at home can be entirely a different experience. The article below explains how to configure a simple remote controlled toy car using a ready made 4-relay remote control module.

If you refer one of the previous articles you will find some data regarding buying of ready made, ready to use remote control modules or devices, which just requires to be wired as per the data and you are able to control any electrical device within a range of 100 meters with a press of a button over the remote handset.

Here we are using one of these ready made remote control modules for implementing the remote car operations.

In this article only the circuit and the wiring part has been discussed, making the car body and fitting of the motors and the wheels will be entirely left on the user, the user may take the help of a carpenter or some fabricator for designing the vehicle body.

The remote control module which is being discussed here uses four discrete relays, which can be toggleed discreretly through the 4 individual switches over the remote handset.

The model car is provided with four wheels, two at the front and two at the rear as usual vehicles have.

The remote control unit may be procured ready-made, the one discussed here will be just perfect for the present application.

Moving back to the proposed project of a simple car remote control, we will need the following components for making the main control units of the system:

A couple of DC motors.

8 nos. 1N4007 diodes.

4 nos. relays, 12V, SPDT

12V Battery, 4 AH SMF, or as per the motor rating.

A general purpose PC boared.

2 nos. 12V DC motors, wattage as per requirement

Once the above things are procured, the motors may be suitably fabricated over a selected piece of metal or wooden base, such that two motrs constitute the two front wheels. Two additional dummy wheel may be fabricated for supporting the front motor wheels.

Remote Controlled Toy Car Fixing Details



You may also want to learn how to make a heavy duty remote controlled trolley circuit for malls and retail shops

After this, the PCB may be populated and wired up with the relays and the diodes with the help of the given figure, this concludes the relay box assembly.


Remote Controlled Toy Car Circuit Wiring Relay Details




RC Remote Controlled Toy Car Circuit wiring diagram



Next, the four relay outputs from the remote control in-built relays should be connected to the diodes of the above relay box circuit.

The antenna from the remote should be sufficiently terminated using a foot long flexible wire so that the module becomes responsive even from longer distances.

The operation will need battery power, so needless to say a suitable battery will also be required to be placed and integrated with the discussed circuits inside the toy car.

Done!. Now you may test the unit by pressing the remote handset buttons.

As per the integration of the relay serial numbers to the diodes of the relay box, pressing of the buttons A,B,C, and D over the remote handset would produce results in some specific orders, such as: forward, reverse, right and left movements with the car.

The entire PCB along with the remote control module may be suitably enclosed over the base of the model car such that the system gives an appearance of a well groomed homemade remote controlled car.

PCB Layout for the Remote Controlled Car (Track Side)



RC Remote Controlled Toy Car Circuit PCB Layout




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  • 60 comments:

    1. hello sir

      is this circuit diagram correct or not ? 4 working for which it is made for,
      plz check link below,
      http://img607.imageshack.us/img607/8682/remotecontrol.gif

      ReplyDelete
      Replies
      1. OK,thnx

        one more thing i want to know?

        i am using circuit wizard for making pcb layout, it is working
        correctly but yesterday i saw tutorial video of circuit wizard on
        internet in which a person after making pcb layout on circuit wizard converts it into CAD/CAM by selecting CADCAM and new window opens in his tutorial for more accuracy like pads size etc etc,,

        but in my circuit wizard there is no new window opens when i select CADCAM option for changing pad size,
        i want to know how can i run cadcam like a person do in tutorial or download from internet
        plz give me link for download above cadcam

        Delete
      2. I am sorry I can't help with it because it's not directly related to my subject and I have little knowledge about it...

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    2. Its not so simple but a i have beed doing try since morning

      ReplyDelete
    3. Can u pls tell me how i can automate a remote controlled car. i want to use a remote controlled car from market. i want it to change its direction automatically when there are obstacles.

      ReplyDelete
      Replies
      1. That would be a very difficult circuit to make, it's better to procure a ready made car rear obstacle indicator unit, and integrate it with the toy car.

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      2. how to make a simple remote for remote control car?

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    4. what is the circuit of remote module????

      ReplyDelete
    5. how can we control the car without remote???/

      ReplyDelete
    6. how i can control car on my laptop....

      ReplyDelete
    7. HI
      I want to know some basics about making receiver and transmitter of a remote car
      So, plz teach me how to make receivers & transmitters

      ReplyDelete
    8. hi mr. where is the circuit for PCB? and when i make it bigger what parts should i use?

      ReplyDelete
    9. dear sir,

      what remote to use?
      plz give example in indian market
      thnx

      ReplyDelete
      Replies
      1. refer to this article, you will have to procure the shown remote control unit from your local market:

        http://homemadecircuitsandschematics.blogspot.in/2012/08/how-to-buy-and-use-rf-remote-control.html

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    10. hii...jus suggest any website,wer can i learn about all this stuff(diodes,relays,transmitters,recievers etc etc),i knw how to make wired rc car bt i knw nthg about wireless plz.....suggest mee..anna

      ReplyDelete
      Replies
      1. I personally do not know any such appropriate website, there are many that will provide you with circuits, but there arn't any proper tutorial sites

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    11. hello sir,
      can i use any remote,which mean's my old remote control cars remote?
      can i......................?

      ReplyDelete
      Replies
      1. if it has 4 relay outputs, then yes you can use it with the above circuit.

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    12. the relays you are talking about in this module can make car very heavy which can make car move slow can you recomend any light weighted transistors to use. can you provide us any circuit for wireless webacam so we can make a spy car.
      thanz in advance.

      ReplyDelete
      Replies
      1. relays are actually very light, so no problem, yes webcam can be added by installing ready made wireless cameras in the car.

        Delete
    13. can you provide us wireless webcam circuit? I already have Logiteck 720 pixels 500ma webcam i want a circuit so i can attach it to my RC car.
      Thanz in advance.

      ReplyDelete
      Replies
      1. You can easily buy them online, see these examples:

        http://www.foxoffer.com/images/large/TE60%205.8G%20Wireless%20Mini%20Camera_LRG.jpg

        http://recordcctv.com/images/mini_camera.gif

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    14. Hi please can i see the circuit diagram for the remote control

      ReplyDelete
      Replies
      1. remote control circuit can be seen here:

        http://homemadecircuitsandschematics.blogspot.in/2012/02/how-to-make-remote-control-circuit-from.html

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      2. .....sorry here's the correct link:

        http://homemadecircuitsandschematics.blogspot.in/2013/07/simple-100-meter-rf-module-remote.html

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    15. And also i need the circuit diagram of a wireless camera thanks in advance

      ReplyDelete
    16. Hi sir can I use xbox 360 controller for it

      ReplyDelete
    17. And what is the function of relay 4

      ReplyDelete
    18. hi, i am Ramesh from chennai,i want make wireless remote car,so any one can help me,what are the things need and how much cost it will take to complete..? please help me its very urgent ,,
      contact : r.ram2012@gmail.com

      ReplyDelete
      Replies
      1. Hi, I have explained the design in the above article, you can try it out.

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    19. Hi,i decided to do the home made wireless remote car business so pls who can do the wireless remote car pls contact me

      email : r.ram2012@gmail.com

      ReplyDelete
    20. good morning sir
      em new student
      sir as u represented in figure there is remote module n
      in component there is no one
      can u tell me about remote module it which is to use or
      or what this helical part is a relay ?
      please make me clear.


      ReplyDelete
      Replies
      1. HOW MANY MATERIALS IS NEEDED FOR MAKING THIS R.C CAR

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    21. Boss can u plz give me a circuit which on/off relay by getting sound of alarm .

      ReplyDelete
    22. Boss plz give me a circuit wich can on/off relay by geting the alarm sound than start forever relay on.

      ReplyDelete
      Replies
      1. please check out the design here:

        http://homemadecircuitsandschematics.blogspot.in/2014/05/sound-activated-remote-control-circuit.html

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    23. Where can I get these simple circuit kit. I want to teach my 8th standard son.

      ReplyDelete
    24. Sir
      Please solve out my problem I have 40 MHz Rc car but it can't move forward it only move backward I have checked all components of transmitter and circuit but nothing to get anything

      ReplyDelete
      Replies
      1. If your Rx incorporates relays, listen whether it clicks or not for both the modes...or connect two LEDs across the motor with opposite polarity and check if the LEDs light up alternately in the forward backward modes.... each of the LEds must have individual 1k resistors in series....

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    25. Hello Swagatam i m having remote control car n i want to make its remote so how i can make it..

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      Replies
      1. Hello vaibhav, that can be difficult, unless you know the frequency of operation of the car Rx module

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    26. Sir how to turn this rc car left or right . what mechanism to use w.r.t relay connections to move left and right movements of tyres ??

      ReplyDelete
      Replies
      1. Jayesh, the left/right function are executed using the assigned keys in the remote handset...the "left" button actuates the relay#4 while the right button actuates the relay#3..... the action stops one of the motors momentarily which in turns causes the car to take either left or the right turn.

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    27. please sir how i make a toy car with a remote control,please list the required implement for me.

      ReplyDelete
      Replies
      1. I have explained it in the above article, please read it carefully, the basic method will be the same for your application also

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    28. i need the picture of the remote control

      ReplyDelete
      Replies
      1. i want to make a toy car with remote control but how do i go about it.

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    29. Hello. I wanted to turn on and off 2 dc motors using ir remote. I designed the ckt but used bd139 instead of relay. But the does not work. But removing transistor it works. Please provide the correct transistor with proper base resistor

      ReplyDelete
      Replies
      1. If the motor total current is less than 4 amps

        you can use a TIP122
        use 1 K for the base

        make sure to use a heatsink for the transistor

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      2. Sir, anyway I tested with bc548 to trigger a relay. That relay should switch dc motor. But the problem is when I press ir remote the state of 4017 o/p doesnt changes, it works fine when the relay driver stage is removed. I followed the exact ckt available in net.

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    30. that can never happen unless something is wrongly connected.

      connect an LED in series with the transistor base resistor.....and see whether it toggles or not in response to your Tx activation

      ReplyDelete

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