Thursday, May 6, 2010

Multifunctional 20 Band Audio Spectrum Analyzer V3.0.x

This project is a version 3 firmware and hardware upgrade spectrum analyzer with 20 audio band of 20 levels each and includes other functions and utilities improvements.

From Digital electronics and programing
From Digital electronics and programing

On future:
  1. Option to put five, ten or more of this boards, each board filtering one frequency, rotated by ninety degrees to obtain large size of panel for disco or other purposes.
  2. Ability to display a text message received on the serial unit.
  3. Ability to display time during sleep.
  4. Function to adjust the signal level manually.
  5. Ability to wake up from standby function if signal input is detected.
  6. Ability to enter standby mode in the absence of input signal.
  7. Ability to export using the serial unit, the levels displayed on the local display.
And many many other functions...........

On this update has been added AGC function(Automatic Gain Control), this function allow the spectrum analyzer to work with signals between 80 and 1000mV without external signal conditioner or external signal regulator.
This function can not be turned off from menu settings.

With this update you can download an update for PC client of the up-loader for  this spectrum analyzer, please go here to download this software.

Is renamed because is one big step from filters combined (digital & analog) to completely digital filtering.
Added functions:
  1. Ability to enter in standby from menu.
  2. Change from help of analog circuits to filter audio bands to completely digital filtering bands, without the help of analog filtering circuits ( this improve the stability of the displayed bands ) .


Added functions:
  1. Improve speed of way to display levels of frequencies 0,1 & 2.
  2. Ability to set the start-up light when is connected to power supply.
  3. Ability to set-up the horizontal way to display the levels of frequencies, normal or mirrored for stereo use, the way is memorized for start-up config.

  1. Eleven different ways of displaying the levels of frequencies.
  2. Five modes(ways) of display luminance.
  3. Ability to set the star-up mode when is connected the power supply.
V3.0.0 & V3.0.1 generic versions( discarded ).

This spectrum analyzer can be bought from here.


jorge said...

What cost for new firmware with the functios implements???. The function this (Not implemented in this firmware version).

What firmware version its impemented the functions???

Morgoth said...

Updates will be free, and will be performed by a programmer or a USB to serial adapter through the bootloader pre-installed.

Hubert said...

Is it possible to remove the led bars to connect and control other LED?

If so, what type of led should I replace the existing?

Morgoth said...

Yes Hubert you can remove the led bars and you can replace with another led matrix with next maximum specifications:
Imax per led 20mA.
Umax per led 3.5V.
If the values ​​of the new matrix exceed this specifications, the new matrix will be less bright.
If the new matrix specifications will be much lower than these values​​, the matrix will burn.

tomchr said...


I have some questions/suggestions regarding your spectrum analyser display.

I like it, but could you program a mode to mimic the speed and sensitivity of the the DBX 20/20 Equalizer?
You can take a look at

Another thing, It would be great if you could add a large LED meter modes dividing several LEDs
into either two horizontal or two vertical left/right channels.
Take a look at

All the best,
Tom Christensen

Anonymous said...

Could you make a mode where you split the LED matrix into two large 10 LED left/right channel columns?

Here are some examples:

Morgoth said...

This board is made to work with mono signal, to view stereo signal will be necessary two of these boards.
Now I work to a spectrum analyzer that will work with stereo signals and will include a mode to display like your propose.
These new product will be available for buy in 1-2 month, the dimensions will be quite same like actual boards, will integrate a usb to usart adapter for easy update, will integrate a dedicated RTC with battery back-up and two connectors to connect in cascade this spectrum analyzers for disco use.

Regis Blog said...

quanto fica para enviar ao brasil

Citris said...

Hi, I have one of theme, and it's simply brilliant, I was surprised to see that it looks to be hand made, and I am impressed with its built. So I would like to thank you, well worth the money.

I don't have one Question tho, when do you expect to have "Function to adjust the signal level manually or automatically." available. Will it just be an update? or will I need to upgrade to a newer unit?

I found with my pre-amp it tends to max out the barks at about 50% volume (Which is very loud, but about what we plat it at for parties etc). I would love to be able to have to adjusted a little.

Thank You, Kirt

Morgoth said...

The manual adjust of input signal will be available on next firmware update.
Best regards.

Citris said...

Hi Morgoth, is there a release date for the next firmware update?

Morgoth said...

Hi Citris.
The next update is established to be released at end of January 2013.
Best regards.

Matthias said...

Some news?

Gheorghiu Iulian said...

At this moment, no news.

Anonymous said...

all dead here?

faysal khaled said...

im from Bangladesh , i want to buy thi analyzer v, so hoy can i buy this circuit ? from where? and price ? if anyone can sell this product or advice me how can i collect , plz plz let me know asap

Gheorghiu Iulian said...

Not dead, this project has an updated hardware and can be purchased from