Desktop Spectrum Analyser with Analog Design

[@harriebosgraaf2977]

Nice work mark! Thanks for sharing.

[@TheElectronicEngineer]

Ur welcome

[@hungnguyen-mi5ft]

Looking very beautiful ,it 's suitable for family space ...

[@michaelo2l]

Up and running 100%, now I might to get the FFT version ;) Many thanks for sharing...

[@TheElectronicEngineer]

My pleasure

[@wclumiere5665]

Great Job Mark! Thanks for Sharing.

[@TheElectronicEngineer]

My pleasure

[@michaelo2l]

I ordered the assembled PCB and am looking forward to playing with it... Excellent series of videos, thank you... now lets see... can I find a use for a few hundred 5mm RGB Leds or should I order some Led Strips?

[@TheElectronicEngineer]

If those are regular leds then those will not work. You need digital leds , pixel leds like ws2812 or similar

[@michaelo2l]

@@TheElectronicEngineer The regular Leds (not addressable) are for another application, I also bought WS2812B (144) led strips for this project... Just checking... how many leds per meter do you suggest, I got 144 but 60 might be enough?

[@juanacevedo7814]

Trying to adapt your 10 analog bands analyzer to my needs. Could you give me the reason for using the multiplex device? Could the 10 bands outputs be tied together and sent to the ESP32 directly? I made your 32(64) channels fft version and it works ok, but don't trust its accuracy in the high frequency bands. I use line input and TFT Displays for my needs. I display 13 amplifier outputs: Subwoofers, Low Woofer, Mid-Range, Ribbons, Surround, Height and Center Stereo channels. I use Car Stereo (transformer) attenuators to bring the amp output to line level. I will add two more analog channels for 10K and 12KHz. Interpolating the values of R1, R2, R3. I only need the frequency spectrum.

[@TheElectronicEngineer]

Well, without multiplexor i would have to use 10 adc inputs, 1 for each channel. If you tie all together the channels will loose their functions and you have to use fft again…in that case you can leave out all the opamp filters….. in the comming weeks i will release a new analyzer. Different fft algorithm And bluetooth as audio source….. that one is a lot more accurate in high and low

[@juanacevedo7814]

@@TheElectronicEngineer Thanks very much for your quick response. I admire your work. Somehow, I never read the entire PDF explaining all the functions. I have now. Especially the Vref explanation. Learning Arduino things at 83 years old. Look forward to the new fft one. Around 1979 I equalized a Coliseum in Puerto Rico using the Hewlett Packard 8050A Audio Analyzer which I still have around ($4000.00 at that time). Playing with these modern ones brings fun and good memories.

[@dariusz_kaminski]

Beautiful work as always, Mark👍 Does this mean you have already started the laser cutter?

[@TheElectronicEngineer]

Thanks Dariusz… but ehh no… the laser cutter is now number 2 in my to do list ( almost there lol ) for this project i used the laser cutter at my workplace)

[@kingsley6480]

May i know what’s the function for wifi? It is possible to play the music using youtube?

[@TheElectronicEngineer]

Sure, wifi is only there to show a live interface, a digital graph of your spectrum analyzer using html webpage. But no, you cannot use it for streaming

[@mickeysol5645]

cool HPNY

[@TheElectronicEngineer]

Thanks

[@YogeshPuriLevitation]

Analog circuit please

[@TheElectronicEngineer]

See the link in video description