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Hi,

in this tutorial I'll show you how did I transfer one of my broken RC cars in working one using Arduino.

(there are some descriptions in pictures so don't just look at text below pictures)

Step 1: Parts

All I used is Arduino, BT HC-06, relay shield ( I really love relays, cheap and can lead currents up to 10A), some LEDs, wires and old RC car.

Step 2: Connecting Diagrams

In pictures is all described.

As power supply for motors I used batteries under the car and for arduino I used 9V battery.

There is on servo for turning the car, there is just ordinary DC motor, so for this setup you have to have minimum of 4 relays, 2 relays are for forward and back and other 2 are for left and right.

Step 3: The Code

Code for android application is in pictures, for programming I used MIT App inventor, it's very simple program for making some basic applications.

I attached arduino code in .txt file, just download it and copy paste it in arduino software.

Step 4: Putting All Together

Android application for car control you can download from here:

https://play.google.com/store/apps/details?id=brau...

I also made simple application just for driving the car, without possibility of controlling the lights, you can download it in attached file.

And here is video :)

That would be it! I'm sorry for the lack of more detailed pictures, but if you have some more questions just post below. Thanks for watching and fell free to vote :)

Hi friends İ want stop car when bluetooth disconnect or lost how to do?
<p>hello evver , i need some your of help, can i have a complete wiring picture of your relay shield and motor because i have tried mine, the motor didnt run but the relay works perfecty but just motor i have no idea why the motor didint run</p>
<p>I really liked this a lot.</p><p>But the file &quot;arduino car control.txt&quot; is a code for arduino or bluetooth controlling app.</p><p>if it is for arduino then it should have &quot;.ino&quot; extension right?</p>
<p>It's for arduino, I used to make some changes in software in notepad at school , so that's why it stood .txt file</p>
<p>Can't we make our own relay shield?</p><p>Is there any site to do it?</p><p>Is your relay shields are of 5v or 12v?</p>
<p>I'll answer on your both posts.</p><p>You can make your own relay shields with no problem, but it was cheaper to buy shield which is already assembled. <br>These relays are 5V and can connect and disconnect around 380V 10A (I think) , if you plan to do it, it's not hard at all, just connect output of arduino to relay coil and you have it :=)<br><br>Arduino Car control.txt is arduino code, just copy-paste it, it doesn't matter if is .ino or .txt, code is a code.</p>
<p>I'll answer on your both posts.</p><p>You can make your own relay shields with no problem, but it was cheaper to buy shield which is already assembled. <br>These relays are 5V and can connect and disconnect around 380V 10A (I think) , if you plan to do it, it's not hard at all, just connect output of arduino to relay coil and you have it :=)<br><br>Arduino Car control.txt is arduino code, just copy-paste it, it doesn't matter if is .ino or .txt, code is a code.</p>
<p>Which battery you used for motors?</p>
<p>2x 4.5V batteries, they are great because they have greater capacity than 6x 1.5V batteries.</p>
<p>is this the image u are talking about</p><p></p><p>and btw M is motor?</p><p>coz i am using 2 motors</p>
<p>I can't see the image.</p><p>Yes, M is motor, the scheme is same for every motor, it's just usual H-bridge.</p>
<p></p>
<p>and u havent given the connections of the arduino to motors</p>
<p>I did, schematic is in pictures, it's just drawn in Paint and contacts are shown visually .</p>
<p>glue them on chassis? how can i do that the chassis wont take power from the batteries if i just glue them. and about the motors (2) i need to connect them to arduino done i?</p><p>and u didnt tell me the power of resistors and btw can u give me ur e-mail adress so that i can mail u</p>
<p>I meant if you have no place to put batteries on chassis ,then glue them on it. <br>Resistors for LEDs are 200ohm. You connect motors over relays because arduino can't give so much current.</p>
<p>and the link u gave me is not working</p>
<p>and can u tell me how to connect the car to the arduino and i have bought a chassis and it doesnt have a socket for battery so i need the chassis to draw power from the arduino itself so plz tell me how to do that and do i connect the wires from motors directly to the relay shield</p>
<p>Glue batteries on chassis, simple as it :)</p><p>https://cdn.instructables.com/FPN/FT3D/HWVAT806/FPNFT3DHWVAT806.MEDIUM.jpg just like that connect the motors </p>
<p>ivver do u mean to say i can buy this</p><p><a href="http://www.ebay.in/itm/like/four-channel-4-ch-12v-uln2003-relay-board-module-raspberry-pi-arduino-avr-/281380321593?pt=lh_defaultdomain_203" rel="nofollow">http://www.ebay.in/itm/like/four-channel-4-ch-12v-...</a></p>
<p>yes</p>
<p>btw in this picture which are the two LED's and resistors (power)</p><p>and do i need to get them .sorry for so many questions and thanks for ur help</p>
<p>and is this shield ok?</p><p>link - <a href="http://hacktronics.co.in/home/51-4-channel-relay-module-with-uln2003.html" rel="nofollow">http://hacktronics.co.in/home/51-4-channel-relay-m...</a></p><p>or i should buy this one</p><p><a href="http://www.ebay.in/itm/8-Channels-5V-Relay-Module-Shield-for-Arduino-ARM-PIC-AVR-DSP-/261599527216?pt=LH_DefaultDomain_203&hash=item3ce88c0130" rel="nofollow">http://www.ebay.in/itm/8-Channels-5V-Relay-Module-...</a></p><p>or this - <a href="http://hacktronics.co.in/home/747-4-channel-5v-relay-module.html" rel="nofollow">http://hacktronics.co.in/home/747-4-channel-5v-rel...</a></p><p>the 1st one is the cheapest so plz tell me weather it will work</p>
<p>Oh gosh, so much spam :P<br>And yes, both are good, if relay triggers on 5v then it's ok. Use ebay, it's cheap for electronics.</p>
<p>2 more options</p><p><a href="http://www.ebay.in/itm/like/four-channel-4-ch-12v-uln2003-relay-board-module-raspberry-pi-arduino-avr-/281380321593?pt=lh_defaultdomain_203" rel="nofollow">http://www.ebay.in/itm/like/four-channel-4-ch-12v-...</a></p><p><a href="http://probots.co.in/index.php?main_page=product_info&cPath=67_85&products_id=369" rel="nofollow">http://probots.co.in/index.php?main_page=product_i...</a></p>
<p>2 more options</p><p><a href="http://www.ebay.in/itm/like/four-channel-4-ch-12v-uln2003-relay-board-module-raspberry-pi-arduino-avr-/281380321593?pt=lh_defaultdomain_203" rel="nofollow">http://www.ebay.in/itm/like/four-channel-4-ch-12v-...</a></p><p><a href="http://probots.co.in/index.php?main_page=product_info&cPath=67_85&products_id=369" rel="nofollow">http://probots.co.in/index.php?main_page=product_i...</a></p>
<p>2 more options</p><p><a href="http://www.ebay.in/itm/like/four-channel-4-ch-12v-uln2003-relay-board-module-raspberry-pi-arduino-avr-/281380321593?pt=lh_defaultdomain_203" rel="nofollow">http://www.ebay.in/itm/like/four-channel-4-ch-12v-...</a></p><p><a href="http://probots.co.in/index.php?main_page=product_info&cPath=67_85&products_id=369" rel="nofollow">http://probots.co.in/index.php?main_page=product_i...</a></p>
<p>2 more options</p><p><a href="http://www.ebay.in/itm/like/four-channel-4-ch-12v-uln2003-relay-board-module-raspberry-pi-arduino-avr-/281380321593?pt=lh_defaultdomain_203" rel="nofollow">http://www.ebay.in/itm/like/four-channel-4-ch-12v-...</a></p><p><a href="http://probots.co.in/index.php?main_page=product_info&cPath=67_85&products_id=369" rel="nofollow">http://probots.co.in/index.php?main_page=product_i...</a></p>
<p>2 more options</p><p><a href="http://www.ebay.in/itm/like/four-channel-4-ch-12v-uln2003-relay-board-module-raspberry-pi-arduino-avr-/281380321593?pt=lh_defaultdomain_203" rel="nofollow">http://www.ebay.in/itm/like/four-channel-4-ch-12v-...</a></p><p><a href="http://probots.co.in/index.php?main_page=product_info&cPath=67_85&products_id=369" rel="nofollow">http://probots.co.in/index.php?main_page=product_i...</a></p>
<p>1 one and the last one will be best for me because the are cheap i need cheap components coz its just my 2nd project and i am not willing to spend too much</p>
<p>this one too</p><p><a href="http://hacktronics.co.in/home/48-4-channel-relay-module.html" rel="nofollow">http://hacktronics.co.in/home/48-4-channel-relay-module.html</a></p>
<p>1 more but this is a little costly</p><p><a href="http://www.ebay.in/itm/8-Channels-5V-Relay-Module-Shield-for-Arduino-ARM-PIC-AVR-DSP-/261599527216?pt=LH_DefaultDomain_203&hash=item3ce88c0130" rel="nofollow">http://www.ebay.in/itm/8-Channels-5V-Relay-Module-Shield-for-Arduino-ARM-PIC-AVR-DSP-/261599527216?pt=LH_DefaultDomain_203&amp;hash=item3ce88c0130</a></p>
<p>are these shields ok? i can buy anyone</p><p><a href="http://hacktronics.co.in/home/51-4-channel-relay-module-with-uln2003.html" rel="nofollow">http://hacktronics.co.in/home/51-4-channel-relay-m...</a></p><p><a href="http://hacktronics.co.in/home/747-4-channel-5v-relay-module.html" rel="nofollow">http://hacktronics.co.in/home/747-4-channel-5v-relay-module.html</a></p>
<p>can someone please tell me where you can get a cheap relay shield and how to connect it to the arduino</p>
<p>can you please tell how to connect the relays please please</p>
<p>I posted a picture in this instructable about connecting relays: <a href="https://cdn.instructables.com/FPN/FT3D/HWVAT806/FPNFT3DHWVAT806.LARGE.jpg" rel="nofollow">https://cdn.instructables.com/FPN/FT3D/HWVAT806/FPN...</a><br>and about connecting arduino to relays, it's simple, GND to GND and 5V to 5V on relays.</p>
<p>thank you</p>
Such a brilliantly made project!! Love the video too!! Really really great stuff, good job on getting that tablet controller.
Thank you! I'm really glad you liked it. :-)

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Bio: I love doing everything what has some connection with any kind of technology. I love to see how stuff works and how to make it ... More »
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