How to Interface pH sensor with Arduino UNO
To interface a pH sensor with an Arduino UNO, you will need to connect the sensor to an analog input pin on the Arduino. The sensor will output a voltage that is proportional to the pH level, which the Arduino can then read and convert to a pH value.
You will also need a voltage divider circuit to scale down the voltage from the sensor to a level that the Arduino can handle. This can be done using a pair of resistors. The specific values of the resistors will depend on the sensor you are using, so you should refer to the sensor's datasheet for more information.
Additionally, you will also need a reference voltage, which can be provided by a voltage reference IC such as LM7805.
After connecting the sensor and the voltage divider circuit, you will need to write an Arduino sketch to read the sensor's voltage, convert it to a pH value, and perform any other operations you want to do with the data.
you will need to follow the components:
- pH sensor
- Arduino UNO
- Voltage divider circuit (consisting of two resistors)
- Voltage reference IC (e.g. LM7805)
- Jumper wires for connecting the components.
Steps involved in Interfacing pH sensor with Arduino UNO
- Place the Arduino UNO and pH sensor in the workspace after adding them to the components list.
- As previously stated, an LC filter was placed on the pH sensor's analog output.
- Connect it to the Arduino's A0 pin. Add a virtual terminal to examine the produced readings.
- Paste the program's hex file into the Arduino's program file area.
- Now run the simulation; if everything goes well, you should obtain the results given in the image below:
- The following video shows the entire functional simulation: