how to slow down voltage drop on a circuit.

im troubleshooting a problem with my pump controller, basically when it kicks in the software side of the controller card there is a small voltage drop when it takes over from the BIOS on the card, as soon as it kicks in the software the voltage drop is enough to trigger a pump failed alarm, even though this is a split second i would like to see the end of it. could i fit a capacitor over the + & - to slow down the drop ?

and if i did that would it cause any issues when it reduces the 12v down from 12 to 8 (and various voltages between)

I think a cap would be good enough to sort that, I guess the lowest value you can get away with
would be best so it reacts to voltage changes faster. If you want to work it out I think all you
need is Q=I.T and Q=C.V

Quote:

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Originally Posted by Kumagoro

Q=I.T and Q=C.V

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thanks for the reply, but what the hell is that :) ?

Charge = Current x Time
Charge = Capacitance x Voltage

I think?

So theoretically you can work out the type of capacitor you need. Don't know much more than that.

ok i would not have a clue how to work that out :)

if koolance support ever get back to me and cant help i shall try and figure something out

Its probably easier to just get a few cap at the right voltage and see if it works just by sticking
on by hand. My guess would be that a 10uF cap would be easily enough, just rip them off some
old mobo. Just make sure you put the electrolytic ones the right way around.