In this circuit this circuit uses a liquid level sensor to measure the level of water in the water tank.
Water sensor circuit diagram.
The circuit produces the sound when the sensor senses a drop of a water leak.
Fig1 in this circuit an ultrasonic sensor is connected to pin d9 and d10 pin of arduino.
The pic below shows you the pinout of the water flow sensor.
Transmitter circuit transmitter circuit is shown in the figure below.
Water sensor brick is designed for water detection which can be widely used in sensing rainfall water level and even liquid leakage.
Connect the pin 7 4 and 2 of uln 2003 ic to create three different levels in the water container.
The following circuit shows the water level circuit diagram.
However one can use two metal needles injection needles to make the sensor.
As clearly indicated in the circuit diagram two closely spaced metal rings are used as the water sensor mechanism.
We can use the three different colored leds to create three detection levels.
It can be used to detect the presence the level the volume and or the absence of water.
If you are new to arduino and lcds you can consider reading this interfacing arduino and lcd article.
Arduino water level indicator circuit.
Water switch circuit schematic.
Connecting a water sensor to an arduino is a great way to detect a leak spill flood rain etc.
Flow sensor photoelectric sensor.
Connect three 1k resistors to the pin 15 13 and 10 of uln 2003 ic as shown in the circuit diagram.
Water level alarm circuit using level sensor.
Arrange the components as shown in the picture.