In my case i connected to gpio2 i e d4.
Water flow sensor circuit diagram.
A round shaped magnet is embedded at the center of the turbine and the hall effect sensor is sealed and protected from moisture and placed above the magnet.
Water flow sensors are installed at the water source or pipes to measure the rate of flow of water and calculate the amount of water flowed through the pipe.
However one can use two metal needles injection needles to make the sensor.
The water flow sensor circuit diagram is shown below to interface a water flow sensor and lcd 16x2 with arduino.
As clearly indicated in the circuit diagram two closely spaced metal rings are used as the water sensor mechanism.
Water switch circuit schematic.
Internally the output pin of the hall effect sensor is pulled high on the circuit board itself as you can see in the breakdown image show above.
Circuit diagram of water flow meter working of water flow meter using arduino and yf s201.
The sensor works at 5v can be connected to vin of esp8266.
The sensor has a magnet and hall effect sensor.
Hence i have not used any external pull up resistors.
Shaft of this structure has magnetic link with hall s effect sensor.
If the output valve of the pipe is closed the output of the water flow sensor is zero no pulses.
In our project we connected the water flow sensor to a pipe.
I used a breadboard and once the connection was done as per the circuit diagram shown above my testing set uplooked something like this.
Flow sensor photoelectric sensor.
Water flow sensor is a digital sensor so we can connect its output pin to any of the digital pins of esp8266.
If you are new to arduino and lcds you can consider reading this interfacing arduino and lcd article.
Rate of flow of water is measured as liters per hour or cubic meters.
If we take a look at the sides of the water flow sensor we can witness a plastic turbine in the path of water flow.
When rotor rotates magnetic field cuts the sensor and when it comes in perpendicular electrical.
Water flow sensor consists of a plastic valve from which water can pass.
In water flow meter a small fan wings like rotor is placed in way of fluid.
Arduino water flow sensor working.
The connection of the water flow sensor and lcd 16x2 with the arduino is given below in table format.