A I understand it, the purpose of the capacitor in a driver circuit is to absorb any start-up voltage spikes. Is there any reason that it can't be put across the input voltage before the current regulating components? Surely this would still absorb any spikes, but if the diode was accidentally disconnected and reconnected then the capacitor charge would still have to go through the current regulator and wouldn't get fried.
I suspect I'm wrong, but would be interested to know why
Also, is there a need for a capacitor at all if you're using a voltage regulator (eg 7805) before the current regulator?
Thanks
I suspect I'm wrong, but would be interested to know why
Also, is there a need for a capacitor at all if you're using a voltage regulator (eg 7805) before the current regulator?
Thanks