Now, if your sensor has an adjustment pot, you may need to calibrate the sensors a little. As mentioned, these sensors turn the amount of reflected light into a value and they then have a threshold that will output true or false for when the value crosses a threshold. The adjustment sets where this threshold is. The next photo shows how:
Calibrating the sensors
This means adjusting them to around the right value. On each of the sensors, there is an adjustable element—a trimpot, which you can put a screwdriver into. The light will be on; this means that the sensor is detecting white (ambient) light, "no line," and will ...
