Functionality: IR Sensor Detection: The IR sensor is connected to digital pin 7 and is used to detect the presence or absence of an object (e.g., the door). LED Indicator: An LED connected to digital ...

Infrared sensor Arduino The connections for the IR sensor with the Arduino are as follows: Connect the negative wire on the IR sensor to GND on the Arduino. Connect the middle of the IR sensor which ...

LEDs on the Arduino can be programmed to indicate if the sensor is/isn’t immersed by the liquid (and thus determine if liquid level is too high/low). The two companies say that the hardware provides ...