06-10-2014, 09:18 AM
Niall, remember that a solenoid is an inductive load, when the circuit is broken you'll get a massive spike of EMF from the coil, hence the need for the flyback diode - which theoretically should sink the kickback into the coil as the power is removed.
However - for some reason, possibly as we've now figured the diode MAY not be fast enough or there's not enough smoothing on the power to the other sensors - so next task is put a cap on and maybe a faster switching diode and see whether this is a help or does feck all.
However - for some reason, possibly as we've now figured the diode MAY not be fast enough or there's not enough smoothing on the power to the other sensors - so next task is put a cap on and maybe a faster switching diode and see whether this is a help or does feck all.