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This gesture controlled robot uses Arduino,ADXL335 accelerometer and RF transmitter-receiver pair.

We will divide the entire robot into 3 parts the transmitter,the receiver and the robot.

The different gestures that have been mapped to the direction of the bot are-

Hand parallel to the ground-stationary

Hand tilted forward-forward

Hand tilted backward-backward

Hand tilted right-right

Hand tilted left-left

I've made the transmitter on thermocol though it can also be made on a glove.

Note:For those of you looking to download all the code, schematics and other pictures at one place and would prefer to use GitHub ,look at the end of this instructable.

Step 1: Materials Required

For transmitter-

  1. Arduino Uno
  2. ADXL335 accelerometer
  3. 433 MHz RF transmitter
  4. Breadboard

For receiver and robot-

  1. Arduino Uno
  2. 433 MHz RF receiver
  3. L293D motor driver IC
  4. Chassis and wheels
  5. 2 DC motors
  6. Breadboard

Of course you will also need jumper wires and 9V batteries

Instead of using the Arduino and breadboard in transmitter like I did ,you may instead use an ATMega328p, which can be programmed from the Arduino board and solder it along with RF transmitter and ADXL335 on a perfboard.

The perfboard can then be attached to a glove.However here I've used a remote controller like setup with the gestures the same

Step 2: Assembling the Robot

Fix the wheels on the chassis.

Mount the DC motors on the back wheels and use dummy wheels for the front.

Mount the L293D IC on the breadboard and place it on the chassis

Place the Arduino on the chassis and make the connections of L293D as follows

4,5,12,13 to GND

1,9,16 to VCC(5V)

3,6 to left motor(output)

11,14 to right motor(output)

2,7,10,15 to pins 8,9,10,7 of Arduino(inputs)

8 to 9V battery

Step 3: Determining the Direction of Robot

You can learn more about L293D from internet.

Basically ,the motor rotates when the inputs supplied are opposite.

For example high,low may rotate the motor in clockwise while low,high in anti clockwise.

If both inputs are same then motor does not rotate.

The following sketch in test.ino will help to determine for what inputs for the 2 motors will the robot move forward.Copy and paste it in Arduino IDE

In my case it was observed that the bot will move forward pin 9 of Arduino is high,pin 8 is low(for left motor),pin 10 is high,pin 7 is low(for right motor).Try different combinations till you get desired direction. Similarly for moving back the combination is high,low,low,high.The bot will go right if left motor is moving and right is stopped by giving same inputs.Similarly for left.

Step 4: Interfacing ADXL335 With Arduino

Mount the ADXL335 and on the breadboard.

The connections to Arduino should be as follows.The Arduino should be different from the one used in step 2

ADXL335 ARDUINO

VCC 3.3 V

GND GND

X A0

Y A1

Z open

ST open

Now copy and paste the code and determine the threshold values for different gestures.

The code gives 2 values xval and yval which will have unique values for different gestures.

Determine the range of values of xval and yval when the hand is tilted forward,backward etc.

Step 5: Interfacing RF Transmitter With Arduino

Mount the RF transmitter on the breadboard in previous step and make connections as follows.

RF transmitter Arduino

GND GND

DATA D12

VCC 5V

Now download the VirtualWire library from the following link

http://www.pjrc.com/teensy/td_libs_VirtualWire.htm...

Extract the VirtualWire folder from the downloaded folder and paste it in arduino-1.6.1>libraries

Now use program the arduino of the transmitter with the code given in the text file.

Basically what the code does is to map the different threshold values (for gestures) obtained in step 4 to different letters (stationary-'s' forward -'f' etc) which are then transmitted through the RF transmitter.

This step completes the construction of the transmitter

Step 6: The Receiver

Mount the RF receiver on the breadboard of step 2.The connections to the Arduino used in step 2 are

RF receiver Arduino

VCC 5V

DATA D11

GND GND

Now program the Arduino with the code given in the file.

The code maps the different letters obtained from the receiver to the inputs for directions.

For instance if the receiver receives the letter "f" corresponding to the bot moving forward,it maps the letter "f" with the inputs low,high,high,low which are the required inputs for the bot to move forward.

Step 7: Run the Robot

Go to this repository to download the code and schematics.Click on the "Clone or Download" button (green in color on the right side) and select "Download ZIP" to download the zip file.Now extract the contents on your computer to get the code and schematics(in the schematics folder).

The gesture controlled robot is now complete.

Connect 9V batteries to both the Arduinos and the L293D motor supply and run the robot.

I've also added functionality by which the on board led on pin 13 of both the Arduinos is on when the bot is moving and off when it's stationary.You may add more such functionality.

Any doubts and connections be clarified by seeing the comments in the given code.

I've posted a video of the robot below.

If you have any queries please leave a comment or contact me through my website.

<p>I need urgent completed code for this project that is seperate code for transmitter arduino and receiver arduino.Anyone help me please! my mail is shoaib7677195@gmail.com</p>
<p>did you get the code for Arduino? if so can I see it</p>
<p>Thanks It was a wonderful project to work with .</p>
<p>The tutorial was highly descriptive. Thank you so much for the steps. Learnt a lot while doing this project. To all the curious people, Arduino Nano can be used instead of Uno. However, for that you need to bring some changes in the code. I went ahead with Uno.<br>YouTube link: <a href="https://www.youtube.com/watch?v=xqbj_SCwMkk" rel="nofollow">https://www.youtube.com/watch?v=xqbj_SCwMkk</a></p>
<p>can you please send the final code with full circuit diagram for the project jamalat1995@gmail.com</p>
<p>firstly this project is wonderfull. I ask the question to you. Can I use nrf24L01</p>
<p>Transmitter is working and producing correct values in serial monitor.</p><p>data is not received in receiving end and motor is not running</p><p>What could be problem??</p>
Can u please mail me the final gesture movement code
<p>The codes are in the .ino files.</p>
<p>can u plz tell me at the receiver code what is the meaning of (0*66)and all that are store in if for motor movement</p>
I find all .ino files then i made connection as what you did but i have a problem with data is not received in receiving end
Can we use arduino nano instead of arduino uno at the transfer section
<p>I have done exactly as told, but the transmitter only transmits data at irregular intervals and sometimes doesn't at all. why is this?</p>
<p>hello,</p><p>i would like to have the final code ,i.e. the receiver's and the transmitter's.</p><p>Pls mail it to: mishaalhere@gmail.com</p><p>pls someone help me!</p>
<p>Hi guys i made this robot, thanks to @Subhan95. I just fallowed the instruction and i did it. It was really cool. I used arduino uno at receiver and arduino nano at transmitter side. There was source issue with nano, but finally i figured it out and it worked perfectly. </p>
<p>hey could u ps list circ diag of how u used rf transmitter and reciver and arduino code,psss pss help me i need help for my end sem project next week</p>
<p>hi.. can i please get the final code???</p>
<p>can i get the final code?</p>
<p>bro..!! programs r perfectly altright its uploading but bot nt moving</p>
<p>its somehow wrong instructable may be in programming part some error is there also rf pair wont work directly with arduino </p>
<p>in this you have to use encoder and decoder also because rf wont work parallely</p>
Hey i bought encoder and decoder but i didn't use it, i think its done internally by software. mine is working properly.
<p>my transmitter is working</p><p>but bot is not working its not moving on any gesture how would i know that my reciever is faulty or i have another fault and what is the length of anteena used in transmitter and reciever</p>
bro I did asbu per instructions ...<br>by its not working .... <br>
<p>while getting values from adlx335 i got differnet values from your one so do i need to change than in reciever code also although i have adjusted the values in transmitter coding .</p><p>my transmitter is working but reciver part(arduino l293d ) i.e whole bot is not moving on forward gesture</p>
Is it possible to use only one arduino?
yes u can !!!
how to connect robotic chassis to drive with arduino and flysky i4 receiver.then their source code.
<p>dude please send the detail info about the circuit connections.I am not getting the rf values sent by the transmitter to the receiver in serial monitor dialogue box.</p>
<p>dude please send the detail info about the circuit connections.I am not getting the rf values sent by the transmitter to the receiver in serial monitor dialogue box.</p>
<p>Can I use here &quot;Gear Motor&quot;,instead of &quot;DC Motor&quot; ??</p>
Also can u tell in detail how to connect batteries to motor and arduino
Also can u tell in detail how to connect batteries to motor and arduino
Hey! It was a good way to make it.....i had a query:we have to program 2 arduinos;one in step 2 and other in step 5.the code for step 5 arduino is given in the link am i right
Please upload a video
Please upload a video
There is no sample video
<p>Can the 433 MHz RF transmitter and the 433 MHz RF receiver, be substituted with a 434 MHz RF transmitter and the 434 MHz RF receiver or should the program be changed, or the circuit? Please help because I only have 434 MHz RF transmitter and 434 MHz RF receiver.</p>
Yes,you can.
<p>What should be the program. Because there are totally 4 programs given. which should we upload to which?</p>
<p>Hey bro<br>tell me the connections of vcc and gnd for the motor driver IC..</p>
<p>look bro!! You can refer the connections made in below diagram...but i will suggest you to buy l239D motor Driver PCB/Module .. so it will be easy for you to go further...</p>
<p>the transmitter is not transmitting the data to the receiver.Both the leds are off inspite of tilting the transmitter part.</p>
<p>Okay! Its pretty simple! In above Circuits Antennas are Not Mentioned...You have to attach 2 antennas (You can Use copper wire which you can shape like coil to increase its efficiency and strength ) to Receiver and Sender side...</p><p>As shown in Attachment below you can see Red circle..this is where you have to attach those antennas... </p><p>All the best for ua project! :D </p>
<p>still not working..!!can you tell me how you made the project ? <br>please mail me : saswatpanigrahy2906@hotmail.com</p>
<p>what are the ratings of the motor and where is the complete code for this project</p>
<p>Can you please tell me all the components which you may have not stated above?</p><p>I tried this using the components states in this. Hand gesture is captured and is transmitted, but the motors just keep rotating in one direction. </p><p>Please help me </p>
<p>can i use aurduino motorshield for that??</p>
I have never used the arduino motorshield myself.However if you can control the accelerometer,rf receiver and motors by using it,you may use it
<p>please can u advice me how to use it(motorshield)??? i mean i wanna use it but need a schematic diagram and programm... can you provide me the schematics and programm??</p>

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