My Big Blue Audio Spectrum Analyzer Video 3

[koolariz]

hi,

i'm a student, and i'm doing this for my final college project.. and i wonder, if you could share, how much program memory did u use with fft and the rest of the code (pic16f877 and exclude boot-loader if any), because i wonder if there is any left to implement displaying text written from a ps2 keyboard, and some other stuff. i'm asking because i'm at the designing stage and i'd like to know the boundaries.

thank you!

[dra90n8]

could you mail me some instruktions on how you made this? i want it so badly and im not able to call you cuse i live in sweden

[bungalowhulk]

can you please make video explaining how you made this?? or post instructions somewhere?i really want to make one for my music production setup. it would make mixing much easier. does it work in real time?

[gavincurtis]

It is in real time to find hidden peaks. You can get it on ebay as a kit now.

Ebay search "VU meter kit"

[gavincurtis]

@bungalowhulk

If you need full assembly, call me 888-892-0764

[Philscbx]

Nice Job.

Watching the VU meters on my iTunes player actually got me here. Google search, and search here, and here we are.

[crackflash77]

Please I need to know that integrate circuit you used to make the vumeter and that integrated circuit usastes for the filters bandpass and of that oreden are the filters 1º 2º o 3º And the size of the box of leds

sorry for my english

[bfcoulombe]

Great work!! I have a project that I need to control 200 5mm LED's. I need 10 columns of 20 leds. Can this control board do so?

[gavincurtis]

It can, but the board is currently wired for 16 X 16. What are you wanting to display?

The current configuration can also diplay scrolling text, simple animation, digital clock, oscilliscope waveform as well as the audio bars as in this video. It all depends on what is programmed in the microprocessor for the desired display.

[johneymute]

oke tell me how to do it and what i do need.

note: i have a famicom console with mono output.

there,re 5 instruments/sounchannels inside the famicom, for wich 2 instruments are far to quit that i even can,t hear it.

my goal is to increase the volume from those 2instruments till it match eachother.

thank you very much.

[gavincurtis]

Hi johneymute,

Have you shopped around at a pawn shop or ebay for one of the stereo graphic equalizers which were popular in the 80's and early 90's? You should be able to pick up a nice 10 band stereo (20 bands total) for under $20.00.

It would have the exact filtering you need with all the bandpass control necessary to amplify the specific sound you want.

It simply would plug in between your famicom audio outputs (RCA line level) and then into your amplifier.

[johneymute]

i wisch i had such simmilar thing, but wich not only does registrate the audio, but that i also can determine wich sound i want to increase, like voices or hich tunes etc,, without increasing eachother.

from no matter mono or stereo,sources.

my goal is to increase some soundchannels in the famicom without dangerouse mods.

[gavincurtis]

If I understand correctly, you want to 'tune' in a particular audio frequency or instrument of a soundtrack and then increase its volume?  That can be done surprisingly easy.

[hurdleturd]

:) pretty!

[LLEMM]

Very nice. Great work

[gavincurtis]

Thank you.

[chapapepe]

Please let me know how to get a hold of or how to build this.

[gavincurtis]

Serious marketing question to you chapapepe. What would you expect a kit of the analyzer to sell for?

[chapapepe]

It's hard to tell without knowing the intricate details: what kind of hardware was used, availability of items, etc.

[ElectronicTechnSC]

I guess $125.00 would be the most I would be willing to pay. I was hoping you would release the schematics and the diagrams. I want to venture and make my own, but orange. Would you release them? Pictures, Schematics, Instructions, HOw to program the chips. When I'm done I would give you props when I show it off.

[gavincurtis]

I might be able to get close to that price with no LED's in the kit (bare display array board). You would provide your own LED's if blue is not your color.

[gavincurtis]

The complexity and large part count challenge could become very costly to sell this as a kit on the market. Kits are fun.. I grew up on them.

But there is a point where the cost of a kit discourages builders; despite the challenge.

I fear this one might be too expensive.

What would you guys (anybody please) pay to have a kit form of this device enclosure included? Premium quality components and 2 sided FR4 PCBs. Full color instructions included too of course.

[gavincurtis]

$200 For the controller with enclosure + $100 for the 8" X 11" display like in the video?

[flagators123]

would you post your items on ebay?

[ds23iebo]

200$ could be a good price, for the display what you intend? Is it a series of leds or there is some other control inside?

[snotaap98]

This looks really cool! I think there would be a market for this.

P.S. plz send me the detailed info too.

Great job!

[phnxMods]

so whats goin on with this? I see mention of having boards made- are you looking at building this as a complete project or as a kit? I'd be interested in maybe a board, parts list, schematics option.

[gavincurtis]

Hi PhnxMods,

Sent you detailed info.

Boards are completed, waiting on custom enclosures from manufacturer.

[changchung]

Hi, is for sale already??? How much??? Thanks

[discotechwreck]

have you made a model that can be purchased yet?

I am very interested

[gavincurtis]

I anticipate final revision pre-production circuit boards available in about 2 weeks. Also working with enclosure manufacturer and board assembler... so about 1 more month before the finished product.

[gavincurtis]

Are you a DJ?

[donstratton]

Nice! I myself am working on a very, very large spectrum analyzer (roughly 3 feet wide). My MSRP is estimated to be WELL under $200, so you really need to rethink your price. Good luck, and again, very nice!

[gavincurtis]

Two things for that price donstratton... manufacture it in China and use a cheap DSP! Make sure it has a fast response time in the upper bands.

That is why my machine is still a prototype... it's too expensive by my design.

[gavincurtis]

Make it so!  :)

[timmyannetts]

Also is it driven by RCA or Speaker level inputs?

[gavincurtis]

Built in microphone or direct RCA inputs.

My goal is a price of $400 or less. Still working on that target. Crappy results so far....

[timmyannetts]

Any idea what you'll charge, or roughly what you'll charge?

[Paulendy]

nice!!!

[blaxpear]

I'm working on a very similar project. Thinking about turning it into an Open Source design project... how did you implement your band-pass filtering?

...Let's connect.

[gavincurtis]

LM324 op amps were used for filtering and the averaging rectifier stages.

[gavincurtis]

Search for the Velleman Spectrum Analyzer kit schematics on the internet. They should be somewhat easy to find. Most 10 band spectrum analyzers are built exactly the same and many parts are still available off the shelf at Radio Shack.

[MindOvrMatr]

I'll pay you to make me one.

[gavincurtis]

Keep a watch on ebay after a few months as the final versions will be there.

[fpenae77]

Gavin thats impressive, I want to make one how did I build it, could you send to me the diagrams

[blobloblow]

hey just wanted to know what the song was called. tnx ;)

very impressive!

[gavincurtis]

DSP design is choppy. Need more power. This is the current solution using analog front end.

[gavincurtis]

Thanks for the compliment DeniTCH. The analyzer is completely homebuilt on a PCB. Filter stages are all 324 op amp.

[DeniTCH]

It is very nice, is it homebuilt? In that case what did you use for sound filtration?