[sdiy] Wanted: non mathematical description of the function of RC-filters

[ASSI]

On Monday 05 August 2013, 22:57:11, Florian Anwander wrote:
> I need your help for a kind of beginners introduction into filters. The
> readers have a quite basic understanding of electronics. They know that
> resistors and capacitors exist (only a few will know what they do), and
> they know the difference of AC and DC.
> 
> Now I am looking for a very(!) simple explanation of the working
> principle of a passive RC highpass and lowpass. There shall be no
> mathematics involved.

As someone else has already commented, to me it would seem preferable if you 
could introduce the concept of a voltage divider first, then move on to 
frequency dependent resistance of a capacitor and then have them understand 
by themselves what happens when the capacitor is put either on the top or 
bottom leg of the voltage divider and how it behaves for different 
frequencies.  Tell them these things are called an RC low-pass and an RC 
high-pass later.  These are three or maybe four easy experiments that they 
could do themselves and it would likely help them understand a great deal 
more than just ex-cathedra explanation.


Regards,
Achim.
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