Simple Adjustable Low-Pass Filter: 12V/5V Power, Dual 50k Potentiometer - Diagrams Needed

Question

Will anyone help with the construction of a low-pass filter?
I would like something quite simple, powered by 12V or 5V and of course to be adjustable (dual 50k potentiometer). If someone knows more, please send me some diagrams.
Thanks in advance

_lazor_ · Answer

The simplest low-pass filter is the RC filter. The RC filter is a passive element and it is not powered, the input signal is applied at the input and the output signal with suppressed harmonics is expected.

https://upload.wikimedia.org/wikipedia/commons/e/e7/Low_pass_filter.png

Instead of R you give a potentiometer and can adjust the damping.

Freddy · Answer

What is this filter for?

HappyWhite · Answer

_lazor_ on the passive filter supposedly there are big losses ... That's why I want some active solution.

I have two questions for you ...

1. Is there any sense in giving a low pass filter to the input of an amplifier that "goes" to the woofer and a high pass filter to the input of an amplifier that "goes" to the midrange drivers (3). The entire speaker will be based on 3x PAM8610. Two mid-range speakers will be connected to one amplifier, 3 the same mid-range speakers to the second amplifier ... and the woofer to the third.

2. If it makes sense, should I provide a high-pass or medium-pass filter to the midrange speakers?

aksakal · Answer

It may make sense to use filters for separate three power tips. If you are interested in the diagram, I will put out the nominal values of the elements and PCBs.

HappyWhite · Answer

Emmm sorry but I'm a beginner ...

maybe something on one operational amplifier? Of course, I mean one operational amplifier for 1 filter And how can you send some good operational amplifiers for 5v to 12v for this purpose because nwm of how many volts I will still supply

And if you are experienced in this, it is like sending me a list of elements

jarek_lnx · Answer

There are two requirements, the first is not to lead to the loudspeaker signals that can damage it, the second - more important for the listeners, how to connect the bands of different speakers so that they work together, the bands must connect so that there is no "hole" or "hill" and that the phase in the transition zone, it matched.

In the sixties, two experts, Russ Riley and Siegfried Linkwitz, thoroughly analyzed the subject, so if you don't want to do crap, look for "Linkwitz-Riley Crossovers" filters (3-way)
e.g
link

aksakal · Answer

Dear colleague! The amplifiers indicated in the diagram are located in 1 housing.

HappyWhite · Answer

Buddy, I point out again that I am a beginner ... Please give me something simple

On one operational amplifier, I would like it, and generally with little need for discrete components.
Once again ... I am asking for some very simple but active filter for bass and sound (i.e. low-pass and high-pass)
And nobody answered me ... Can I connect the midrange speaker to the low-cut filter?
Added after 1 [minutes]:
Will you send the back of the tile?

Can I make such a filter on a prototype board and use a "spider" from the bottom instead of paths? It often happens to me that while leading tin paths, the pads fall off.

And if you could create a wiring diagram for me in Eagle or other, but not as individual amplifiers, only the circuit diagram.
Integrated circuit, resistors, encoders

aksakal · Answer

Colleague, jarek_lnx! Yes, I am to the author of the topic and I recommend an analogous scheme, just simpler, taking into account what my colleague - a beginner.

Added after 3 [minutes]:

It's easier for the fact that I put out, there can only be passive filters.

Added after 4 [minutes]:

Simple Adjustable Low-Pass Filter: 12V/5V Power, Dual 50k Potentiometer - Diagrams Needed

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