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hey guys welcome back to Hash include
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Electronics in this video we are going
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to make simple line follow Robo using
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arduno the idea behind this Robo is to
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detect black line using two IR sensors
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and move Robo accordingly using l298 and
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motor driver module I will explain how
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we solved one of the major issue with
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such robot so let's get started and
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build this robot if you haven't
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subscribed yet please hit subscribe
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button below and press Bell icon to get
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for making line follow Robo we will need
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two WD car kit which comes with car
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switch we will also need arduno Uno two
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modules l29 motor driver
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module double-sided tape
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black electrical tape for making the
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line 7 to 12v DC battery in our case
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lipo 2s battery and few jumper wires
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let's assemble the car now first let's
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Motors Mount two Motors on car chases
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screws attach front wheel
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now attach l298 motor driver module on
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chasis place Ado Uno on car chases using
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tip attach Wheels to Caro
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fix two IR sensors on front of car using
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gun solder battery connector wires to
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switch and fix it on the car
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chasis now let's make a connection as
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per circuit diagram connect left and
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right Motors to motor driver
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module connect l298 motor driver module
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to arduno Uno pins as per
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table attach wires to plus 5 volt and
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ground pinof motor driver module
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we will take plus 5 volt and ground from
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l298 motor driver module and provide two
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IR sensors also provide plus 5 volt and
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Uno now connect right and left IR
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sensors out pins to d11 and D12 of
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respectively connect wires from switch
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to plus 12 volt and ground pin of motor
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module now Place battery on car chases
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let's take a quick look at code first we
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need to Define right and left IR sensor
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pins as d11 and D12 we will use motor
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speed as 180 then declare right and left
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motor pins for l298 motor driver module
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inside setup function we need to set the
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pwm frequency as higher this is very
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important step the problem with TT gear
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Motors is that at very low pwm value it
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does not even rotate if you increase the
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pwm value then it rotates faster and our
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Robo is not controlled in that speed and
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it goes out of line for that we need to
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increase the frequency of analog right
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function this changes the frequency of
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pwm signal on pin D5 and D6 as 781 2.5
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HZ because of it motor runs in
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controlled manner at low speed with high
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pwm value Now set up motor pins as
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output then set up IR sensor pins as
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input initially stop both the motors
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using rotate motor function which takes
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right and left motor speed as argument
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inside loop function read the right and
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left IR sensor values using digital read
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function if both values are low that
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means sensor did not detect the black
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line so rotate both Motors forward if
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right sensor detects black line then
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turn right by rotating right motor in
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Reverse Direction and left motor in
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forward direction if left sensor detects
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black line then turn left by rotating
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left motor in Reverse Direction and
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right motor in forward direction if both
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sensor detects black line then stop both
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the motors we have written rotate motor
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function which takes right and left
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motor speed as argument if motor speed
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is negative then it rotates motor in
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Reverse direction if motor speed is
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positive then it rotates motor in
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forward Direction else it stops the
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motors you can adjust the speed of
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Motors if your Robo needs speed
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adjustment the code and diagram link is
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given in the description below now let's
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upload the code let's make a path using
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black electrical insulation tape you can
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keep the thickness around 4 cm now we
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need to adjust the sensitivity of ir
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sensors place right IR sensor on black
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line and adjust the potential meter so
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that led does not glow same for left
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sensor make sure that both Wheels rotate
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in forward direction if we keep Robo on
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White surface if not then reverse the
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motor wires connected to l29 driver to
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change the rotation that's it let's see
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line follower Robo working depends upon
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many factors like battery used width of
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the black line distance between sensor
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and Robo design you need to adjust these
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parameters according to the robo hope
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you enjoyed the video and thanks for
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watching stay safe and please like share
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comment and don't forget to subscribe to
