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

My aim is to produce a line of merchandise follower robot with a bump sensorwhich coffin nail pass on if it goes off course. investigate Line follower robots are most commonly produced totake deduct in competitions. The purpose of the line follower robot isto follow a line. The robot will only follow a line that is obtuseagainst a white background or a white line against a ignominious background.This is so that the sensors can distinguish a kick the bucket difference in gently and so the robot can mite and follow the line. From my researchI have decided to use infrared light LED emitters (phototransistors). Theyare fairly cheap but work comparatively well.To research into the project I was going to make I looked on theinternet to find different examples of the line follower robots. I installmany different variations and concentrated on the components used. Ilooked into books and gathered information on how to assemble thecircuit on the breadboard and researched on how th e components work.I have researched on the type of amplifiers I could use for the linefollower. I will use an amplifier to increase the current as I am employ low voltage. I looked on the Maplins website (www.maplins.co.uk)and decided to use the LM386 because it is fitting for low voltageapplications and it is relatively cheap.Specification * The robot has to be fit to follow straight lines, curves and turn around corners* It has to follow a black line that is against a white background* It must work using one 9V battery* The robot must be able to reverse from any obstacle it hits* It should be able to function on its receive (No help needed to guide it)* It should be small and light, easily to incline and pick up if veered off course.* Should indicate what direction it will turnGeneration of possible solutionsI could use 2 light hooklike resistors to detect the difference inlight reflected from the line. It would react quite slowlyI could use two phototransistors which emi t infrared beams onto theline. When less light is detected on the phototransistors there isless resistance thus allowing the motors to inspire.Sub-system teachingMy circuit had two designs combined. First is the line follower, whichdetects light and track downs according to the line, and the other part is abump sensor which when it stumbles across an obstacle it reverses,this is ... ...llowed the light. I also used an ammeter to check the currentpassing through the circuit. This affirm that my circuit wasworking correctly. When I covered the phototransistors the there wasaround 0.4 A passing through. However, when I applied light onto thephototransistors (using an ordinary LED) I discover that the reading onthe ammeter was 8.6 A. this proves my theory that covering thephototransistors, it increases the resistance.Evaluation My circuit workings well and follows my specification.The motors move forward when light is placed and it and slow go across whenno light is present on t he 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 plant using a 9V battery* It has a relay which reverses the direction of the motors play so it can move away from obstacles* It doesnt 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 present it back on the line* Has two LEDs which indicate what direction it is go