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 ...

This research aims to design the work system for a water pH and TDS indicator device by using Microcontroller Arduino, ... This device uses a sensor and utilizes a block diagram for device ...

As mentioned earlier, this circuit takes its power directly from the Arduino UNO R4 board’s 5 V and GND pins. The pH-detection module’s pin P0 was connected to the Arduino board’s analog pin A0. This ...