This is schematic for a pump controller circuit I got from Drawlogix. I would like to know why they've used diodes IN4150 in the circuit. Are they for preventing current flow in a particular direction? Please assist.
Also I would like to know the function of the 5.6KOhms plus 220nF capacitor that are connected to the input signals. Any signal conditioning ? Please help me with this too.
Cheers,
James.