ph-doser automated ph doser system using arduino Parts List Uno: 12$ paristaltic motor: 10$ *104 ceramic capacitor x3: 3$(its a 50 pack, you only need 3 of them) Voltage Isolator 26$ Bnc connector 7$ 16x2 i2c lcd 3$ push buttons x2 1$ ph circuit 40$ 12v power supply 8$ ph probe 20$ Total: 130$ License MIT