Object follower using arduino
Basically there are two types of line follower robots: one is black line follower which follows black line and second is white line follower which follows white line. Line follower actually senses the line and run over it. Concept of working of line follower is related to light. This behavior of light is used in building a line follower robot.
In this arduino based line follower robot we have used IR Transmitters and IR receivers also called photo diodes. They are used for sending and receiving light. IR transmits infrared lights. Here in this arduino line follower robot when sensor senses white surface then arduino gets 1 as input and when senses black line arduino gets 0 as input. Then comparator compares both voltages and generates a digital signal at output. LM is used as comparator. LM has inbuilt two low noise Op-amps.
Arduino Pro Mini is used for controlling whole the process of line follower robot. The outputs of comparators are connected to digital pin number 2 and 3 of arduino.
Arduino read these signals and send commands to driver circuit to drive line follower. Driver section consists motor driver and two DC motors. Motor driver is used for driving motors because arduino does not supply enough voltage and current to motor.
So we add a motor driver circuit to get enough voltage and current for motor. Arduino sends commands to this motor driver and then it drive motors. Working of line follower is very interesting. Line follower robot senses black line by using sensor and then sends the signal to arduino. Here in this project we are using two IR sensor modules namely left sensor and right sensor.
When both left and right sensor senses white then robot move forward. If right sensor sense black line then robot turn right side until both sensor comes at white surface. Complete circuit diagram for arduino line follower robot is shown in the above iamge. As you can see output of comparators is directly connected to arduino digital pin number 2 and 3.
And one motor is connected at output pin of motor driver 3 and 6 and another motor is connected at pin 11 and We have used two sensor namely left sensor and right sensor. Arduino is an open source hardware and very useful for project developments. Here we have used arduino pro mini in this project as arduino pro mini is small and so breadboard compatible.
LD is a motor driver IC which has two channels for driving two motors. I have added a voltage regulator to get 5 volt for arduino, comparator and motor driver.
And a 9 volt battery is used to power the circuit. Will there be no headder file included in program?In the video you can see the whole work, but here I'll describe better each step and share more pictures. USB cables for mBot and for Pixy ; screwdriver; utility knife.
You will also need a computer to code the mBot and configure Pixy. After that, you no longer need the computer to play with the object follower robot.
Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. If your mBot is not assembled yet, you can follow the steps in the above video. Just skip the assembly of the Ultrasonic Sensor. If your mBot is already assembled, just remove the Ultrasonic Sensor. There is no Pixy bracket for mBot on the market. Because of this I made my own with a small piece of 2 mm thick polystyrene sheet.
I used the toner transfer method to transfer the bracket template available at the attached files to the polystyrene. But it can be made even easier by simply gluing the model with stick glue, or by simply drawing it directly into the polystyrene.
With Pixy comes some L-shaped metal brackets and some screws. They are used to attach Pixy to the custom bracket. And finally, Pixy and the custom bracket should be attached in front of the mBot where the Ultrasonic Sensor was attached.
LDR based line following robot using Arduino and Ardumoto
The Dupont ends must be connected to Pixy, like in the above picture. The two remaining ends black and white must be insulated to prevent short circuit. The RJ25 end can be connected in any of the four mBot ports.How To Make A DIY Arduino Obstacle Avoiding Car At Home
The first application we'll use is the PixyMon. Question 1 year ago. Neat project, love the easy to use camera, Pixy cam was so easy to set up and use, got the mBot on sale for 40 bucks on Amazon only issue was ordering the Rj25 to dupont wire, which I ended up making.
Really a great project thanks for the tutorial, it satisfied a my dream as a kid to have my own robot following me around. Great work! My dog likes to make mess when im not around, but she lost interest for my robot vacuum cleaner pretty fast.
Your robot seems like a perfect solution to follow pets.Infrared sensors can also measure heat emitted by an object and detect motion.
Few of the key applications of the IR sensor are:. So, in this Instructable I'll show you how to make an IR sensor which can detect objects and can be used in simple applications. Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson.
We cannot see Infrared light through our eyes, they are invisible to human eyes. The wavelength of Infrared nm — 1mm is beyond the normal visible light. We can see them through a camera though. The IR radiation emitted by the emitter is reflected from the object is caught by the emitter and a voltage is produced.
This is how an object is detected. Follow the schematic to make the circuit. Here, the voltage produced by the IR Receiver is converted from analog to digital and is used as a reference to know whether the object is detected or not. This pic can be called as the signal pin. An LED is used to indicate the detection of the object. Before we move on to the actual code, we need to calibrate the sensor. To view the analog values from the sensor, upload the Analog In Out Serial from the Example sketches.
Now you can see the values sent from the sensor. You can see the change in values if you bring an object in front of the sensor. Using these values set a threshold. Use this threshold value to judge whether there is an object in front of the sensor.
Once you have verified the code, upload it to the Arduino. Now, it's time to test it. If you bring an object in front of the sensor, you should see the LED turn on. You can also see the message being displayed on the Serial Monitor. This means that you have made an IR object sensor. I was successful with this project. I had a few notes The emitter and detector are backwards.Here I will be showing you how to build a motion following car.
A body for the car. Whatever you choose, it should have a base, wheels, and two motors. A motor driver chip. Two power sources - one for the motors and one for the Uno. I used 4 AA batteries for the motors and a 9V for the Uno.
Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. First thing to do is figure out where you want the parts to be placed on the car body and find a way of sticking them down I just used double sided mounting tape. The ultrasonic sensors should be placed on the front of the car and the motor driver can be placed on top of the 9V battery to make it fit.
Once you have everything in place you can start by attaching wires to the motors and ultrasonic sensors. I tried to use the same colour of wire for each part to make things a bit more clear. Ultrasonic sensor wires for both sensors are: echo - green and trig - yellow. Red for positive and black for negative terminals were used as much as possible.
Once you have the components wired you can attach them to the Arduino and each other via the breadboard. Here is how everything was attached to the Uno board:. At this point you should have all the sensors wired to the Arduino, and now you just need the power and motors! I connected wires from the 5V and GND Arduino pins to separate lines of the breadboard, then attached the positive and negative leads from the ultrasonic sensors to the same lines on the breadboard.
On the same lines I also attached the positive and negative leads from the 9V battery.
On the other side of the breadboard I attached the motor driver positive and negative leads to the positive and negative leads of the 4 AA batteries. I also added a wire from the negative line to a GND pin on the Arduino.
The last part is to attach the leads from the motor driver "Motor A" to the leads from the right motor and the leads from "Motor B" to the left motor and you should be done! This code runs in the Arduino IDE and it shouldn't require any additional libraries. I have included the file or you can copy and paste it from below. Here is a video of my car running. The car should follow your hand, foot, etc. If it isn't working as expected, you might have the motor leads positive and negative flipped so the motor is running in the opposite direction.
Thanks for this awesome tutorial. Any idea what range this can follow up too? I have a broken tot im planning on fitting it inside to follow my daughter. What about avoiding static objects? Thanks With advancement in robotic systems towards being autonomous surveillance robots the need for more smart thinking robots has become very essential. One of the aspect of tracking an object from its visuals has been taken up in this project Object Tracker and Follower Robot.
In essence this project clubs in image processing and driving a robot autonomously with what visuals have been caught as has been in the case of Machine Vision projects. This project will be using a Raspberry Pi processor board for computational purpose and driving of the robot. The camera attached to the system captures the images of the front of the robot where it is attached. By monitoring a stream of incoming images the robot is able to autonomously decide to proceed in which direction it should go.
The incoming visuals are processed using image processing techniques. By the use of image processing the coordinates of the target is recognized by the robot following which it follows a path to get to the target.
In this project we have demonstrated this ability of the robot by using a yellow colored Smiley face ball. Whenever a ball is placed in front of the robot it recognizes the ball shape and color and estimates by this about what direction is it from its current location and also an approximated distance from the ball. With these calculations it proceeds towards the ball and stops at a location near the ball.
This project demonstrates the capability of robots having target tracking capabilities autonomously with the help of image processing and robot driving by the results of image processing.
The robot can follow the object even when the object is moving at a speed which can be tracked. In this way with the help of advanced technology the Object tracker and follower robot can achieve object tracking autonomously. Block Diagram. Toggle navigation. Search Search for:. Ltd grows exponentially through its research in technology.A robot chassis- you can buy one from sparkfun. There are basically two ways of building a line following robot. A dark object reflects less light than a bright object a dark object absorbs more light than a bright object this is the only fundamental logic behind a line sensing robot.
So, basically a line following robot distinguishes a black line from a white surface. Download in pdf format. LDR Projects. Test your sensor: Before you start assembling the sensor onto your robot chassis, check your if sensor is detecting the black and white surfaces properly.
Even a small mistake can take your robot out of black line. There follow the instructions carefully. You can see that the LEDs are connected at a difference of exactly 4 solder holes. Second important thing you should remember is that the LDRs should be slightly above the LEDs, so that they get the reflected lights properly.
I have made a circular path. And I made the black line using a black board marker, you can try with electric tape also.
Hello sir. This is because without the arduino code,the robot will not move. Please reply fast!!! Its beacuse they are so close to the ground and the leds are all they percieve. In my code i added a serial comunication to see this. Great Algorithm and Logic of code. Just one query. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam.
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Object Tracker & Follower Robot Using Raspberry Pi
Following an object with ultrasonic sensor. I made some topic days ago wondering about some "challanges" for our arduino robot. So we thought we should try to program the robot, either following an other robot that has an preprogrammed route or follwing an object like a hand or stick or something similair.
So how I thought we had to do if the robot should be able to manage this was: 1. One in the front and one on both sides of the robot. If the robot sense a object that's within 20 cm on the sides of it with the sensors placed there the robot turn to that side, like if the left sensor notice an object within reach the robot turn left until the front sensor recognizes and then the robot again starts moving forward?
Am I completely wrong about this I am a beginner? I was looking at makeblocks product video for the starter kit were the show a little bit when the robot is following the hand. Re: Following an object with ultrasonic sensor.
The robot in the video isn't following a hand, it is stopping or reversing the drive motors when it detects a hand or wall. What you want to google is "follow me robot" or "Stalker bot".
Quote from: mjalaly on Feb 17,pm. The art of getting good answers lies in asking good questions.