The idea of the line sensor is that the sensor will emit some sort of light and if it hit on the white surface, most of the light would be reflected and the receiver on the sensor will get some higher value, whereas the black surface would absorb most of the light and the receiver would get some lower value.
Line sensor
The flame sensor is just sensing the infrared light and gives a value to the robotic program, so we can based on the value to determine if there is any fire in front of the flame sensor.
Flame sensor
We also had a mini competition that uses the line sensor and flame sensor to find the flame and stop right in front of the flame.
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