Acidity Arduino Sensor
ARDUINO PH METER In this project, we will be making a benchtop pH meter using the gravity analog pH circuit and probe from Atlas Scientific and an Arduino Uno. The base plate is used to mount the Arduino, pH sensor and mini breadboard. 6.4mm 14quot thick acrylic sheet is used. a Using a band saw, cut the acrylic sheet to 135x62.5mm. b
With this low-cost Grove-pH Sensor kit, you can easily connect a pH meter and start measuring pH in your water! By measuring the hydrogen-ion activity in water-based solutions, this sensor gets a pH reading. For makers and hobbyists looking to create a project regarding pH, this sensor kit will be perfect for you with its wide accuracy range.
Required components for building pH meter using Arduino. 1x Arduino Uno R3 1x Analog pH sensor kit OLED Display 0.96 I2C Few connecting wires Circuit Diagram. Connect all the required components as shown in the below connection diagram. The connections between Arduino and pH sensor module are same as above method.
The interfacing process for both pH sensors is easy. Employ proper calibration and wiring for accurate measurements. Connecting the Gravity Analog pH Sensor to Arduino Connect the VCC of the sensor to the 5V pin of the Arduino. Breadboard the Arduino GND to the GND of the sensor.
GND Analog Sensor GND. P0 PH output pin Analog Pin T1 Output pin of onboard temp. sensor LM35 Analog Pin T2 Output pin of DS18B20 waterproof temp. sensor Digital Pin Circuit Description of Arduino PH Meter. The circuit of the Arduino PH meter is shown in figure 1. 5V from Arduino is connected to Vcc of the module where GND pin to
DFRobot Gravity Analog pH meter V2 is specifically designed to measure the pH of the solution and reflect the acidity or alkalinity.As an upgraded version of pH meter V1, the sensor greatly improves the precision and user experience. The onboard voltage regulator chip supports the wide voltage supply of 3.35.5V.The output signal filtered by hardware has low jitter.
pH calibration solutions. Put the pH sensor in 7.00 pH calibration liquid. Uncomment phCalibration and upload the sketch. Open up your serial monitor, you will see an output saying what your phOffset is. Update const phOffset with the result from step 3 and upload the sketch. Put the pH sensor in 4.00 pH calibration liquid and let the value stabilize.
The basic circuit diagram for connecting a pH sensor to Arduino is shown below The pH probe generates a very small voltage in mV range proportional to the hydrogen ion concentration. This needs to be amplified to scale it to the 0-5V range of the Arduino analog inputs. An op-amp IC like LM358 can provide the necessary amplification or buffering.
The sensor used in this project has an accuracy of - 0.2. The pH meter will operate within this accuracy in the temperature range of 7 - 46C. Outside of this range, the meter will have to be modified for temp compensation. Note The pH probe can be subjected to a range of 1 60 C. Read more ARDUINO PH METER
Testing Arduino pH Tester. We have tried this Arduino pH meter by dipping it into pure water and Lemon water, you can see the result below. Pure Water Lemon Water This is how we can build a pH sensor using Arduino and can use it to check the pH level of various liquids. Complete code and demonstration Video are given below.
