Applications for the sudden voltage/current increase across capacitors/inductors

Does anyone know any applications for the sudden voltage/current increase across capacitors/inductors using a DC source? and plz include any diagrams and/or explanations if possible..

voltage spike

mostly such spikes related with power supply outputs

Re: voltage spike

i think i know what you are thinking about this, but sudden voltage/current increase is what very much to be avoided.

in the other hand, thinking of something useful from the unwanted is nice but it would be very hard to think for it... though...

voltage spike

hmm... if you will read some books on inductors, this "sudden voltage/current increase across capacitors/inductors " that you're mentioning is used on lighting cold cathode lamps. the "flyback" voltage produced by inductors when they are suddenly switch off is used to generate voltages larger than the original voltage source. this is useful for lighting several LEDs using only a 1.5 volts battery! considering that typical red LEDs require around 1.7 V to light up. and also do you see those flourescent lamp ballast that is used on emergency lamps? their energy source is only a 6 or 12 V battery but they are able to light up flourescent tubes that requires much larger voltages than that!... and oh, did you know that it is also in AC form! just try to read more about inductors and i'm sure you'll find more applications. have fun!

Re: voltage spike

stevemac,
Auotomobile igniton system
Flyback power supply/regulator