loading
Picture of Internet-Controlled RC Car

The Internet Controlled RC Car allows you to remotely drive around a small rc car from wherever you may be and see where it is going. This is fun because you can remote explore whatever space you leave it in, or hand over the keys - so to speak - and allow someone to drive around your space. This is also a great building block for a telepresence robot.

This project is also a great beginner project for someone who has made a few simple things and is looking to get slightly deeper into the world of microcontrollers. It starts to incorporate more advanced skills like circuit building and networking, but is not dauntingly complex.

 
Remove these adsRemove these ads by Signing Up

Step 1: Materials

Picture of Materials

You will need:

(x1) RC car (RadioShack #60-875)
(x1) Wireless camera (RadioShack #55056398 - web only)
(x1) Arduinio Uno (RadioShack #276-128)
(x1) Seeed Ethernet Shield (RadioShack #276-241)
(x1) Rectangular PCB (RadioShack #276-150)
(x1) 1" round PCB (RadioShack #276-004)
(x1) 7805 5V regulator (RadioShack #276-1770)
(x1) 10uF capacitor (RadioShack #272-1013)
(x1) 0.1uF capacitor (RadioShack #272-135)
(x1) M-type jack (RadioShack #274-1582)
(x1) K-type plug (RadioShack #274-1567)
(x4) 5V SPST relays (RadioShack #275-232)
(x1) 6" x 4" x 2" project enclosure (RadioShack #270-1806)
(x1) 7.2V rechargeable battery (RadioShack #23-2183)
(x5) AA batteries (RadioShack #23-2212)
(x1) Ethernet cable (RadioShack #55058573 - web only)
(x1) USB cable (RadioShack #26-713)
(x1) Assorted zip ties (RadioShack #55066143 - web only)
(x1) Shrink tube (RadioShack #278-1627)
(x1) M3 nut, bolt and washer

Step 2: Insert the Shield

Picture of Insert the Shield
3B.jpg
3C.jpg

Insert the shield's male header pins in the matching female header pins on the Arduino.

Step 3: Remove the Cover

Picture of Remove the Cover
2B.jpg
2C.jpg

Remove the four screws from the bottom of the RC car keeping the top plastic cover in place, and put the screws aside for later reassembly.

Remove the top cover.

Step 4: Power Conversion Circuit

Picture of Power Conversion Circuit
4B.jpg
RCpowerSchematic.png

Build the circuit to convert 7.2V to 5V on the 1" round PCB as specified in the schematic.

Step 5: Plug

Picture of Plug
5B.jpg

Attach a red wire between the 5V output on the power conversion PCB and the K-type plug's center pin.

Attach a black wire between ground and the outer jack connection.

Twist the cover on the jack shut to insulate it.

Step 6: M-type Socket

Picture of M-type Socket
6B.jpg
6C.jpg

Connect a black wire between ground on the round power conversion PCB to the center pin on the M-type jack.

Connect another black wire to the pinon the M-type jack to the left of center.

Connect two red wires to the pin to the right of center. Connect one of these red wires to the power input pin of the LM7805 voltage regulator.

Step 7: Connect a Battery

Picture of Connect a Battery
7B.jpg
7C.jpg
7D.jpg
7E.jpg
7F.jpg

Cut the power connector off of the 7.2V rechargeable battery.

Solder the red wire from the battery to the unused red wire from the M-type jack.

Solder the black wire from the battery to the unsused black wire from the M-type jack.

Insulate any exposed connections with shrink tube.

Step 8: Remove the Circuit Board

Picture of Remove the Circuit Board
8B.jpg
8C.jpg
8D.jpg
8E.jpg
8F.jpg

Remove the screws from the remote control and open the case.

Next, remove the screw securing the circuit board in place, and cut the wires going to the battery compartment to free it from the case.

Step 9: Clean the Contacts

Picture of Clean the Contacts
9A.jpg

Use a Q-tip covered in rubbing alcohol to clean any grease that may be on the contacts for the joystick controls.

Step 10: Solder Wires

Picture of Solder Wires
10B.jpg
10C.jpg

Solder wires to each of the contact pads for the remote control's joysticks.

Step 11: Relays

Picture of Relays

Solder four relays to the rectangular PCB board.

Step 12: Wire it Up

Picture of Wire it Up
12B.jpg
12C.jpg

Wire the remote control board to the relay board as specified in the wiring diagram.

Step 13: Connect the Arduino

Picture of Connect the Arduino
13A.jpg

Connect the Arduino to the relay board as specified in the circuit diagram.

Step 14: Program

Picture of Program

Setting up the wifi camera could be an Instructable unto itself, and I am not going to go over it here. That said, it comes with a pretty thorough instruction booklet for getting it configured. To get it running, just follow along with the instruction booklet that came with the camera.

What I will go over is the Arduino program.

Fortunately, there is not much to cover. The Arduino will be used to load a website at specific IP address. When you click on the links on this website, it will send HTTP requests back to the Arduino. These requests are then processed by the Arduino to trigger the relays connected to the car's remote control. When the relays are toggled high, the remote is activated and the car moves around. You can then see where it moves by loading the web interface for the IP camera in the background.

To prepare the Arduino, simply program it with the following code:

  /*********************************

  Internet Controlled RC Car    

  For more info visit:
  <a href="http://www.instructables.com/Internet-Controlled-RC-Car/"> http://www.instructables.com/Internet-Controlled-...</a>

  Code is in the public domain

  ***********************************/



  //include necessary libraries
  #include <SPI.h>
  #include <Ethernet.h>

  //mac address does not change
  byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; 
    
  //change this to your IP address
  //this can be found by running the program
  //File --> Examples --> Ethernet --> DhcpAddressPrinter
  IPAddress ip(192,168,2, 7);

  // Initialize the Ethernet server library
  // with the IP address and port you want to use 
  // (port 80 is default for HTTP):
  EthernetServer server(80); 
     
  String webClickRequest;
     
     
  void setup(){
    
     // initialize the digital pin as an output.
     pinMode(4, OUTPUT); 
     pinMode(5, OUTPUT); 
     pinMode(6, OUTPUT); 
     pinMode(7, OUTPUT); 
     
     
     // Open serial communications and wait for port to open:
     Serial.begin(9600);
     while (!Serial) {
       ; // wait for serial port to connect. Needed for Leonardo only
     }
     
     
     // start the Ethernet connection and the server:
     Ethernet.begin(mac, ip);
     server.begin();
     Serial.print("server is at ");
     Serial.println(Ethernet.localIP());
   }
   
    
    void loop(){
      // Create a client connection
      EthernetClient client = server.available();
      if (client) {
        while (client.connected()) {
          if (client.available()) {
            char c = client.read();
     
            //read the incoming HTTP request
            if (webClickRequest.length() < 100) {
     
              //store the request to a string 
              webClickRequest += c;

            }
     
            //check to see if the request has come to an end
            if (c == '\n') {
     
              //Begin drawing out the website using
              //using basic HTML formatting with some CSS
              client.println("HTTP/1.1 200 OK"); 
              client.println("Content-Type: text/html");
              client.println();
              client.println("<HTML>");
              client.println("<HEAD>");
              client.println("<TITLE>Internet Controlled RC Car</TITLE>");
              client.println("<STYLE>");
              client.println("body{margin:50px 0px; padding:0px; text-align:center;}");
              client.println("h1{text-align: center; font-family:\"Trebuchet MS\",Arial, Helvetica, sans-serif; font-size:24px;}");
              client.println("a{text-decoration:none; width:75px; height:50px; border-color:black; font-family:\"Trebuchet MS\",Arial, Helvetica, sans-serif; padding:6px; background-color:#aaaaaa; text-align:center; border-radius:10px 10px 10px; font-size:24px;}");
              client.println("a:link {color:white;}");
              client.println("a:visited {color:white;}");
              client.println("a:hover {color:red;}");
              client.println("a:active {color:white;}");
              client.println("</STYLE>");
              client.println("</HEAD>");
              client.println("<BODY>");
              client.println("<H1>Internet Controlled RC Car</H1>");
              client.println("<br />");
              client.println("<br />");        
              client.println("<a href=\"/?left\"\">LEFT</a>");
              client.println(" ");
              client.println("<a href=\"/?forward\"\">FORWARD</a>");  
              client.println(" ");      
              client.println("<a href=\"/?right\"\">RIGHT</a>");
              client.println("<br />");
              client.println("<br />");
              client.println("<br />");            
              client.println("<a href=\"/?backleft\"\">BACK LEFT</a>");
              client.println(" ");
              client.println("<a href=\"/?back\"\">BACK</a>");
              client.println(" ");  
              client.println("<a href=\"/?backright\"\">BACK RIGHT</a>");
              client.println("</BODY>");
              client.println("</HTML>");
     
              //Stop loading the website     
              delay(1);
              client.stop();
     
     
     
            //check to see if any of the drive commands have been sent
            //from the webpage to the Arduino
            
            if(webClickRequest.indexOf("?left") > 0){
              Serial.println("hello");
                  left();
                  delay(1000);
                  brake();
            }

            else if(webClickRequest.indexOf("?forward") >0){
                forward();
                delay(1000);
                brake();
            }
            
            else if(webClickRequest.indexOf("?right") >0){
                right();
                delay(1000);
                brake();
            }
            
            else if(webClickRequest.indexOf("?backleft") >0){
                left();
                reverse();
                delay(1000);
                brake();
            }
            
            else if(webClickRequest.indexOf("?back") >0){
                reverse();
                delay(1000);
                brake();
            }
            
            else if(webClickRequest.indexOf("?backright") >0){
                right();
                reverse();
                delay(1000);
                brake();
            }
            
            
            //clear the string for the new incoming data
            webClickRequest="";
     
            }
          }
        }
      }
    }

  //drive functions
  //here on down
  
  void reverse(){ 
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH); 
  }

  void forward(){
    digitalWrite(4, HIGH);  
    digitalWrite(5, LOW);   
  }

  void right(){
    digitalWrite(6, HIGH);  
    digitalWrite(7, LOW);  
  }

  void left(){
    digitalWrite(6, LOW);   
    digitalWrite(7, HIGH);  
  }

  void brake(){
    digitalWrite(4, LOW);    
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);   
    digitalWrite(7, LOW); 
  }

Step 15: Reattach the Antenna

Picture of Reattach the Antenna
16B.jpg

Attach the antenna back to the appropriate part of the remote control board using a nut, bolt and washer.

Step 16: Drill

Picture of Drill
17B.jpg
17C.jpg

Drill a 1/4" hole near the corner on the front face of the project enclosure.

Drill a 3/4" hole on the side of the enclosure.

Step 17: Insert Wires

Picture of Insert Wires
18B.jpg

Insert an ethernet and USB cable through the 3/4" hole.

Note: If you don't have a computer to keep this powered up, you can replace the USB cable with a 9V power plug for the Arduino's m-type power jack.

Step 18: Put it Together

Picture of Put it Together
19B.jpg
19C.jpg
19D.jpg
19E.jpg

Plug the ethernet cable into the Ethernet Shield and the USB cable into the Arduino.

Place the Arduino and related circuitry inside of the enclosure, and pass the antenna through the 1/4" hole in the enclosure.

Finally, close the case using the lid and mounting hardware.

Step 19: Batteries and Zip Tie

Picture of Batteries and Zip Tie
20B.jpg
20C.jpg
20D.jpg

Remove the battery compartment lid from the RC car and insert five AA batteries.

Weave a zip tie through the holes in the lid and fasten it shut.

Step 20: Drill

Picture of Drill
21B.jpg

Drill a 3/8" hole through both of the plastic tabs protruding from the center-top of the RC car frame.

Step 21: Attach the Camera Stand

Picture of Attach the Camera Stand
22B.jpg
22C.jpg
22D.jpg
22E.jpg

Pass a zip tie through the holes drilled through the tabs in the top of the case and use this to secure the camera mount in place.

Next, attach another zip tie to the one already woven through the battery compartment and use this to hold down the camera mount.

Tighten the zip ties and add additional ones as necessary to make sure that the camera mount is held securely in place.

Step 22: Remove the Mount

Picture of Remove the Mount
23B.jpg

Remove the camera ball-socket mount (if you have not done so already).

Step 23: Drill the Car

Picture of Drill the Car
24B.jpg
24C.jpg

Drill a 1/2" hole in the top of the RC car frame at the point the camera mount will pass through.

Drill 1/8" holes near each of the four corners of the back windshield.

Step 24: Attach the Battery

Picture of Attach the Battery
25B.jpg
25C.jpg
25D.jpg

Using the four holes drilled in the corner of the windshield, zip tie the 7.2V rechargeable battery in place on the inside of the case.

Step 25: Mount the Jack

Picture of Mount the Jack
26B.jpg
26C.jpg

Drill a 1/4" hole in the car's rear bumper and mount the M-type jack using its mounting hardware.

Step 26: Pass the Plug

Picture of Pass the Plug
27B.jpg

Pass the K-type plug through the hole in the roof of the car.

Step 27: Hot Glue

Picture of Hot Glue
28B.jpg

Hot glue the 5V regulator board somewhere safe and out of the way on the inside of the frame.

I found that the between the two protruding tabs on the top of the frame worked really well.

Step 28: Fasten the Lid

Picture of Fasten the Lid
29B.jpg

Fasten the lid and the car's frame back together using its mounting screws.

Step 29: Mount the Camera

Picture of Mount the Camera
30B.jpg
30C.jpg

Lock the camera mount back onto the camera's stand, and then fasten the camera in place.

Step 30: Turn It On

Picture of Turn It On
31B.jpg

To turn on the car, hit the on switch on the underside of its frame and plug the K-type plug into the camera.

Step 31:

Picture of

To use, simply load the IP address of your ethernet shield in a web browser and in another window load the IP camera.

1-40 of 43Next »
pgupta313 months ago

Hi,

nice one .made it using arduino uno , ethernet shield , tp link nano router 702 N(converting to wifi) and two servo motors. I want to add ultrasonic sensor to it ,

tried it by adding sensor but I m facing difficulty in modifying sketch for obstacle avoidance.I dont know much programming can you help me with modified sketch?

pgupta31 pgupta313 months ago

I have not used relays as I m directly controlling from browser through wifi.

code cant run ip will not open if the code run i have set mac and ip also correct plz help

so i searched for the wiring diagram, and figued out one that would work.

--------------------------------3----

1--------------------------------------4

---------------------------------2------

1 goes to the ground of what the RC remote uses for that functions ground. I.E. when you go forward, all the controler is doing is connecting a middle contact with another, and that same middle is used for reverse. so connect 1 to that common ground. then 4 will go to the contact that is specifict for that function. 2 goes to the ground on the audrino, i just connected them all together and poped it in the extra ground pin for the audrino. 3 goes to the designated pin on the audrino that gets the calls of High or Low. Feel free to send me a message if this isnt clear enough.

Someone asked for a better pin-out so here it is. Feel free to ask anything else. I had to go through a different process to get mine wireless, so if you want to know how, I can make something for people if they want, otherwise I'm not going to if people dont need/ want it. Feel free to message me if you want how I got it put together!

pinout2.png
paulray01124 months ago

Do you think I could get the wiring Diagram please.

paulray01124 months ago

Do you think I could get the wiring Diagram please.

midnightcow7 months ago

Hi, randofo.

Nice instructable. It's so good idea. I think also Ethernet to IR gateway solution as you. Because I have always been found where is TV remote-controller.

Your intructables will help me for making Ethernet to TV romote-controller.

Thank you.

ibenkos8 months ago
Smart idea! Do I have to use the same ethernet shield as you use? I have the original arduino ethernt shield, can I use it? And do I have to do any wiring differently?
dudyash ibenkos8 months ago

is this car is wireless ??? and if yes then how ??? i dun want to use Lan cable, it will b be its drawback

arjen.arie8 months ago

Do you have an electrical plan of the connection of your arduino, components and wifi shield? And also something like a H- bridge of your project?

is this car is wireless ??? and if yes then how ??? i dun want to use Lan cable, it will b be its drawback

dudyash8 months ago

IS this car without cable ??? or if not, then how to make it wireless ? with use of arduino wireless shield or what ?
please suggest i want it to b wireless, dun wan lan cable with it..it is its drawback

Haiderbokhari9 months ago

wiring diagram?

alaa.m.odeh11 months ago

where is wiring diagram?

Hey man,were you able to get that wiring diagram? I kinda need it too, tnx!

did you guys get the relay wiring diagram?
sanand79 months ago
thanks i will try and send a result
sanand79 months ago
thanks i will try and send a result

is there any alternet option for ARD124B2P ethernet shield??????????????

should i use another ethernet shield

nd what will be change in program???????

plzzzzzz reply its very urgent

donaldyan11 months ago

A quick question. where is the diagram mentioned in step 12 Wire it Up?

"Wire the remote control board to the relay board as specified in the wiring diagram."

A really good solution with off-the-shelf parts!

Hey bro, were you able to get that wiring diagram you were looking for? I kinda need it too, tnx!

chriskeeet10 months ago

What if I use Aceduino aside from Arduino?Would that be okay?

chriskeeet10 months ago

What if I use Aceduino aside from Arduino?Would that be okay?

chriskeeet10 months ago

What if I use Aceduino aside from Arduino?Would that be okay?

hmalik311 months ago

I just read it out and really felt pleasure that such things can be made also . I'll try my best to make this for my brother he love toys and this is a advanced one

Question! I have a GoPro Hero 3 Black, can I use this as my camera or do I have to have a webcam? I want to find a small enough camera to fit in the RC I have without too much modification to the body of it as well as aesthetically pleasing to the eye.

you could use the gopro app for streaming

you could but you would only be able to record and store to the go pro sd card. wouldnt be able to stream like a web cam

Another question as well. Is there a way to change the Java script so that I may use my Keyboard instead of the page. I would like the driving to be pretty smooth.

kshowell11 months ago

Great project !

Finally get to play with the Ethernet Shield I've had for a while.

izea97sk8ter11 months ago

This is an awesome project! The only thing I would recommend would be to cut and reconnect battery wires one at a time to avoid sparks and damaging batteries. Still this is a really great project, keep up the good work!

jeffyg311 months ago

this is awesome. I can keep watch of my apartment while I'm away. Plus looks fun to mess around with. I'm gunna find a WRX remote car to match my Subaru. Thanks for the project post :)

the45furnace11 months ago
Roughly how much did everything cost?

Just made a quick total of all said parts. It comes to $235

BikeHacker11 months ago

This is so cool man!

tominjose11 months ago

Thanks for sharing!!

cgrrty11 months ago

非常棒!我想可以通过IO口和三极管还有上拉电阻 代替继电器。

rocketman22111 months ago

How much lag do you get with that camera?

I tried making something like this once with a digital camera, but I had to replace it with an analog one to get rid of the lag on the video.

zrelli11 months ago

awsome project

1-40 of 43Next »