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Electronics => Beginners => Topic started by: zzlong94 on November 21, 2017, 06:00:42 pm

Title: Uses of capacitor connected in series with Vdc
Post by: zzlong94 on November 21, 2017, 06:00:42 pm

Capacitor is connected in series with Vdc to clear off the ripple of Vdc.
However, the value of capacitor is just 100 nano Farad .
it is possible to clear off ripple of Vdc or its act as another function as well?

Title: Re: Uses of capacitor connected in series with Vdc
Post by: rstofer on November 21, 2017, 06:13:26 pm

I guess I don't see the capacitor as 'in series' with anything but rather connected across the power supply and it is intended to absorb high frequency transients.  This is commonly called a 'decoupling capacitor'.  Dave has a video about this:

https://www.youtube.com/watch?v=BcJ6UdDx1vg (https://www.youtube.com/watch?v=BcJ6UdDx1vg)

Title: Re: Uses of capacitor connected in series with Vdc
Post by: nugglix on November 22, 2017, 07:35:57 am

And Alan has one with experiment and the usual nice explanation.

https://www.youtube.com/watch?v=9EaTdc2mr34 (https://www.youtube.com/watch?v=9EaTdc2mr34)

Title: Re: Uses of capacitor connected in series with Vdc
Post by: Brumby on November 22, 2017, 08:40:44 am

Quote from: zzlong94 on November 21, 2017, 06:00:42 pm

Capacitor is connected in series with Vdc ...

It absolutely is not.  It is connected in parallel, commonly described as "across".

Using multiple Earth symbols for all "ground" points is frequently done, but it takes away the visual cue of a single line running across the circuit diagram, which makes parallel connections much more obvious.