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


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.






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49 comments

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Anonymous
January 12, 2013 at 1:20 AM delete

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

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Anonymous
January 12, 2013 at 7:08 PM delete

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

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January 12, 2013 at 9:22 PM delete

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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January 20, 2013 at 12:03 PM delete

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

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Anonymous
February 18, 2013 at 3:55 PM delete

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.

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February 18, 2013 at 8:18 PM delete

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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March 19, 2013 at 4:03 PM delete

what is the circuit of remote module????

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March 19, 2013 at 4:38 PM delete

how can we control the car without remote???/

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May 24, 2013 at 10:35 PM delete

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

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June 4, 2013 at 11:13 AM delete

how to make a simple remote for remote control car?

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June 10, 2013 at 3:53 PM delete

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

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July 11, 2013 at 10:05 AM delete

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

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Anonymous
August 9, 2013 at 4:13 PM delete

dear sir,

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

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August 10, 2013 at 9:09 AM delete

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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September 18, 2013 at 7:15 AM delete

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

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September 18, 2013 at 6:20 PM delete

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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October 9, 2013 at 6:06 PM delete

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

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October 9, 2013 at 7:13 PM delete

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

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October 17, 2013 at 9:54 AM delete

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.

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October 17, 2013 at 5:23 PM delete

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

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October 18, 2013 at 8:30 PM delete

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.

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October 20, 2013 at 10:27 AM delete

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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January 3, 2014 at 4:51 AM delete

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

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January 3, 2014 at 4:54 AM delete

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

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January 3, 2014 at 12:45 PM delete

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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January 3, 2014 at 12:46 PM delete

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

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

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January 6, 2014 at 6:14 AM delete

Hi sir can I use xbox 360 controller for it

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January 6, 2014 at 6:18 AM delete

And what is the function of relay 4

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January 10, 2014 at 7:22 PM delete

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

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January 11, 2014 at 12:12 PM delete

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

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January 11, 2014 at 7:59 PM delete

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

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April 9, 2014 at 12:29 PM delete

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.


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May 13, 2014 at 10:00 PM delete

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

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May 14, 2014 at 11:46 AM delete

I'll try to produce it soon in my blog!

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May 23, 2014 at 10:45 AM delete

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

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May 24, 2014 at 9:11 AM delete

please check out the design here:

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

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June 5, 2014 at 3:09 PM delete

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

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November 17, 2014 at 6:02 PM delete

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

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November 18, 2014 at 1:07 PM delete

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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December 27, 2015 at 6:54 PM delete

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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December 28, 2015 at 11:26 AM delete

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

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January 19, 2016 at 12:20 PM delete

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 ??

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January 19, 2016 at 6:42 PM delete

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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