Line Following Robot Using LDR sensor
protues Design
Line following Robot is used to follow the line path on surface. the line may be black or white in color .here i constructed a line following robot using LDR Sensor it can travel black line on the white surface .
Requirments:
1. Dual voltage comparator-ic(LM 393)
2. Gear Motor - 100 rpm
3. Led -( yellow -2 ,white -2)
4. Ldr-4
the protues Design and its Hex code is given below . download and simulate the line follower on protues vsm
Simulation Files:
1. Protues Simulation File -DOWNLOAD
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the LDR Sensors are low cost light dependent sensor. it can change its resistance according to the change of light Intensity. Here i used four LDR sensors for sensing light difference from black and white surface. we know that light can't reflect from black surface because it absorb the light fall on it but white body will reflect light from surface therefor i used a pair of white led for the light source to receive light from white surface . LDR1 ,LDR2 are checking the left side of line following robot and LDR3, LDR4 are checking the left side of robot. when left side become white surface the robot ON the left side motor therefore robot moves to right side. but when right side of the robot become white surface robot ON the right side motor then robot moves to left side . due to the unbalanced color difference on track surface and corresponding motor ON and OFF conditions moves robot on line drawn on the surface
Image shows the response of LDR at light. light's parameter in luminescence and LDR resistance in ohm.
My video of introducing the line following robot from youtube :
Thank u for downloading and watch my video
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