• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

My aim is to produce a line follower robot with a bump sensor which can

Extracts from this document...


Aim: My aim is to produce a line follower robot with a bump sensor which can reverse if it goes off course Research: Line follower robots are most commonly produced to take part in competitions. The purpose of the line follower robot is to follow a line. The robot will only follow a line that is black against a white background or a white line against a black background. This is so that the sensors can distinguish a clear difference in light and so the robot can trace and follow the line. From my research I have decided to use infrared LED emitters (phototransistors). They are fairly cheap but work relatively well. To research into the project I was going to make I looked on the internet to find other examples of the line follower robots. I found many different variations and concentrated on the components used. I looked into books and gathered information on how to assemble the circuit on the breadboard and researched on how the components work. I have researched on the type of amplifiers I could use for the line follower. I will use an amplifier to increase the current as I am using low voltage. ...read more.


This also means that if less light is on the LEDs, or no light, there is high resistance, little current passes through the circuit. The motors do not move resulting in the robot being stationary. So in my circuit the phototransistors are constantly shining down. So when the infrared is being emitted on the white background it reflects the light so the LEDs sense light reflected on them. This makes the motors free to move and so the robot follows the line. When the robot reaches a corner in the line, it will turn towards the line. This is because when it reaches a turning point, one of the phototransistors is reflecting on the white background while the other on the black background. The colour black absorbs light; the infrared beam is being emitted on the black line is not being reflected back. The motor connected to the LED on the black line will slowdown and eventually stop. The LED on the white background however is getting light reflected on it because the colour white has the ability to reflect all light. The motor connected to the LED on the white background is running. ...read more.


This showed that the robot works as it followed the light. I also used an ammeter to check the current passing through the circuit. This confirmed that my circuit was working correctly. When I covered the phototransistors the there was around 0.4 A passing through. However, when I applied light onto the phototransistors (using an ordinary LED) I noticed that the reading on the ammeter was 8.6 A. this proves my theory that covering the phototransistors, it increases the resistance. Evaluation: My circuit works well and follows my specification. The motors move forward when light is placed and it and slow down when no light is present on the phototransistors. * Robot has the ability to move in s straight line, around curves and turn corners. * With the photo transistors it can follow a black line against a white background. * It works using a 9V battery * It has a relay which reverses the direction of the motors turning so it can move away from obstacles * It doesn't require anyone to move it or guide it using a remote control. * It is light and easy to move so when it goes of course I am able to put it back on the line * Has two LEDs which indicate what direction it is turning ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Systems and Control section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Systems and Control essays

  1. Elecrtonics - Audio Amplifier

    Selecting the solution:- I am going to build solution b as this system fulfils more of my specification. It allows me to adjust the volume, treble and bass of my output. It will also provide stereo sound and increased sound quality and power of the output.

  2. Bicycle Alarm Project

    The NOR only solution is therefore the simplest at this stage. SR flip-flop Some kind of latch was required for the full/part set selection. The simplest way of achieving this is to use a SR flip-flop. In a IC there is normally 4 flip-flops and to use this for only

  1. Getting On Line Without a Computer or Internet Access at Home

    "Agencies can hear our voices now! We contacted a few agencies to request trainings for Spanish speaking families and now they are listening." "I never knew how much information I was missing out on, now I can be more informed and connected with my child's disability and what's available as far as intervention.

  2. Design and Technology Project Design an Advertisement

    They are all also strong, the only problem I have noticed that in the workshop the wood tends to dirty easily but I think that is just down to that nature of the environment, otherwise I feel it wouldn't pick up marks too easily, so it shouldn't be too difficult to clean.

  1. Water level sensor

    3.61 2.29 Evaluation Alternative method: I can hardly find any alternative method for the water level sensor. that makes it more important to us. Is the best way to get accurate result in detecting water level changes inside the oil tank.

  2. The aim of this investigation is to design, build and test a sensor.

    The voltage divider circuit gives an output voltage which changes with illumination. A sensor subsystem which functions like this could be thought of as a 'dark sensor' and could be used to control lighting circuits which are switched on automatically in the evening.

  1. 'A small business wishes to sell a range of electronic games to help alleviate ...

    This makes it harder for you to cheat by pressing and holding the push-to-make switch and sweeping it across the target. The diode, D1, and the capacitor, C3, ensure that there is a reasonable supply voltage across the UM3750 even though the voltage collapses when S13 is pressed.

  2. Report into Electricity Generation and Sustainable Energy

    Without a load, the purpose of building a circuit is lost because what is the use of building something that does not provide any significant service. Leads connecting the source to the circuit known as alligator clips are required for ease of connection and disconnection.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work