Spectrum analyser Equalizer project how to go about it?

[Maglatron]

ok any online drawing tool you can recommend?

 

[bertus]

Hello,

Some members are using Kicad for drawing schematics and PCB's.

KiCad EDA

A Cross Platform and Open Source Electronics Design Automation Suite

www.kicad.org

In the resources there are also some tutorials.

https://maker.pro/forums/resources/kicad-tutoriol-source.78/

Bertus

 

[Maglatron]

this might sound really stupid but what do the transistors do on both the column and row?

 

[Martaine2005]

what do you mean by channels?

Channels = band. Not input from your PHONO plugs (RCA). So you’re saying 15 channels (bands). Think of it like an equaliser, 10 band or 30 band per channel (left & right) RCA.

Martin

 

[Martaine2005]

this might sound really stupid but what do the transistors do on both the column and row?

They switch on and off. They also amplify the signal.

Martin

 

[Maglatron]

OKay so been having a go at KIcad this is where I've got to!! so right I need to edit the diodes to be LED's how to do this?

 

[Maglatron]

So I made a 1 column, so how do you choose a bandwidth of the frequency that this column will turn on and and how do you make it so that when the frequency is the same but the amplitude goes up and so making the LED higher up the column light??? thanks for the KiCAD it's nice. and where does the signal go, does it go into the resistors?

 

[danadak]

So I made a 1 column, so how do you choose a bandwidth of the frequency that this column will turn on and and how do you make it so that when the frequency is the same but the amplitude goes up and so making the LED higher up the column light??? thanks for the KiCAD it's nice. and where does the signal go, does it go into the resistors?


View attachment 60566

Thats were the code and sampling come in.

1)So you create an array whose size is replication of your desired frequency resolution,
and then write a routine to start an A/D and fill that array.
2) Once filled you run the FFT code on that which creates an array where each ROW is
the frequency and two elements in the array, for that row, are real and imaginary magnitude
of the FFT computeted spectra complex magnitude
3) Then you code a routine to take each pair of elements and do the sqrt(sum of squares)
to convert to magnitude and save that.
4) Next you scan array by ROW and convert that MAGNITUDE to a LED value, how many
to turn on. Save that in an array.
5) Now you code the LED scan taking the Array values just computed and turn on GPIO pins
to set the correct number LEDs in that column.

Thats the basics.

I would advise you start posting on Infineon site on how to do the FFT with CMSIS library
and manage A/D conversion, etc.. I posted earleir a link to CMSIS project you can incorporate.

Earlier you posted :

and am having them vertical for a total of 30 LED's high (because they are sets of 10) and am having 16 columbs like picture attached. So there will be a grand total of 180 LED's in the matrix - look at the picture! I'm not too fussy about how to achieve this but all suggestions are welcome!

# LEDs = 16 COLUMN x 30 LEDs / COLUMN = 480 LEDs For that you need 16 + 30 GPIO = 46 GPIO.
Thats pretty close to exhausting that parts GPIO. You might post at Infineon site and ask if there is a
bigger board with more GPIO. Or two PSOC boards, like two of the 059 boards, and break up array
between them. Will take some coding as you will have to pass the FFT array from one board to the
other so it can do its scan.



You may be forced into a chipscale package to get enough I/O, ask Infineon if they
have a board that uses this.....

 

[Maglatron]

They switch on and off. They also amplify the signal.

Martin

I know they switch on and off, is it that one channel/column/band is assessed at a time

Thats werre the code and sampling come in.

1)So you create an array whose size is replication of your desired frequency resolution,
and then write a routine to start an A/D and fill that array.
2) Once filled you run the FFT code on that which creates an array where each ROW is
the frequency and two elements in the array, for that row, are real and imaginary magnitude
of the FFT computetd spectra complex magnitude
3) Then you code a routine to take each pair of elements and do the sqrt(sum of squares)
to convert to magnitude and save that.
4) Next you scan array by ROW and convert that MAGNITUDE to a LED value, how many
to turn on. Save that in an array.
5) Now you code the LED scan taking the Array values just computed and turn on GPIO pins
to set the correct number LEDs in that column.

Thats the basics.

Okay can you write it out idiot proof i.e.
1)So you create an array whose size is replication of your desired frequency resolution,
and then write a routine to start an A/D and fill that array.
You do this by.... and thank you for your help!!! the more words I have the faster I can learn. I am going to try and do It with the protocol that you have described, cheers

 

[Maglatron]

also I can't access email where I am so can't use the infineon forum because I can't register account

 

[danadak]

Set up a gmail account, access it like you access this site......you need to post at Infineon.....or have
a friend in another location set up an account for you.

Whats the URL for your companies website, Maglatronix ?

 

[Maglatron]

thanks danadak do you know how to shrink the components on the design window because I cant fit the entire circuit on the page

 

[Maglatron]

It's what my company is going to be called in the future It's not got a website

 

[Maglatron]

I'll get my friend to sign up to infineon my internets limited so cannot access social media or emails thankfully this site does not ask for a confirmation email to sign up that's the only reason why I can come on the site!

 

[danadak]

What tool are you using ?

 

[Maglatron]

What tool are you using ?

what do you mean its psoc creator

 

[Maglatron]

also can I add my ltspice libraries to the program

 

[danadak]

Are you using PSOC Creator or a schematic drawing program ?

 

[Maglatron]

KiCAD

 

[Maglatron]

So I've signed up with infineon (I had my mum do it)