Controlling the pH level of a solution is usually a tedious task. Adding an acid or base to the solution will change the pH, but manually monitoring the levels and adding the correct amount isn’t fun.

The pH meter project features open software and open hardware design circuit which can be connected with an electrode pH sensor made of glass. The device is termed as pHduino which can operate by ...

An ORP sensor, very similar to one for pH, reports the ORP value in millivolts (mV). A positive voltage means that the system is capable of attracting electrons, thus indicative of an oxidizing ...