Introduction: 100 LED 10 Band Audio Spectrum Atmega32 MSGEQ7 With Peak Hold and Fall Down

Picture of 100 LED 10 Band Audio Spectrum Atmega32 MSGEQ7 With  Peak Hold and Fall Down

 MSGEQ7 and atmega32  based  Audio Spectrum.
10 level height and 10 band width.
 peak hold and fall down display style

Step 1: Components List

Picture of Components List

      components list
1, atmega32 - 1
2, MSGEQ7 Audio spectrum ic -1
3, veroboard - 1
4, RED  Bar graph  LED  -10
5, 20 pin ic base -   10
6, BC557 -10
7,Resistors - 330Ω  -10
                      -  8.2KΩ  -1
                      -  200kΩ  -1
                      - 22k Ω    -2
                      - 10k Ω    -1
8, ULN2803     ic    - 2
9, 7805   5V regulator ic -1
10, crystal - 16Mhz -1
11,Capacitors-   22pf-3,  0.01uF -1, 0.1uF  - 2
12, single-strand wire 

Step 2: Circuit Diagram / Wiring Diagram

Picture of Circuit Diagram / Wiring Diagram

Step 3: MSGEQ7 Board.

Picture of MSGEQ7 Board.

Step 4: Assembled Board - Final

Picture of Assembled Board - Final

Step 5:

Picture of

at mega 32 hex file.
Fuse settings
1, External crystal  high Freq  16CK + 64 ms;
2, no memory lock features enabled
3, serial program download enabled

USB  Programmer Software :

atmega-32 Audio spectrum  Hex File

Step 6: Working Video


SHARANYADAS (author)2016-07-06

Please share the source code to everyone for learning purpose.Without the source code,the project is kind of incomplete to the end user.Obviously anyone who is working on microcontrollers,doesn't want to do a copy-paste type job!!!!Making the project without knowing the source code would be like that copy-paste type of work....

RIJO VADAKKAN made it! (author)2016-03-04

Hi sir can u plz give me ur contact number; i need some help

SenthurK (author)2016-05-09

how to design the MSGEQ7 separates the audio spectrum into 5 or 7 frequency bands?

please help me!

SenthurK (author)SenthurK2016-05-09

(1 band use only 1 led)

tuleivlad made it! (author)2016-03-07

some pictures of the beasts

tuleivlad (author)2016-03-07

it would be great if the guy who made it first, posted this from the begining in the fuse settings, it would save me a day of swearing and trying to figure it out.

tuleivlad (author)2016-03-07

i've sorted out finaly, it is not the clock, you must disable the jtag port witch is using the channels 3 to;s working fine now.thank you for your post.

tuleivlad (author)2016-03-04

channel no. 3,5,6 are pulled high by atmega and channel no.4 is low.

RIJO VADAKKAN (author)tuleivlad2016-03-04

RIJO VADAKKAN made it! (author)2016-03-04

tuleivlad (author)2016-03-04

IT DOES NOT WORK, only 6 channels are working, the other four in the middle of the screen are not. It's software issue.

bimay (author)2016-03-04

projeknya kaya tai !

Reactive Light (author)2015-10-03

Would you be willing to post the source code rather than just the hex file?

SaeedN5 (author)Reactive Light2016-02-10

Hi. I need to source files ;(

JosiahS4 (author)2015-11-03

Is there a way that I can invert the output to the led's so they are this

knavinda (author)2015-08-30

can i give this circuits pcb?????

chris.dorvius (author)2015-04-22

how did you attatch the audio input to the circuit what component did you use and what is that thing at the bottom of the tape wrapped around the black, red and white wire

Marsstar (author)2014-09-01

How did you output music,if you had to connect your MP3 player onto this board.

(How do I hear the same music at the same time it is being processed by your board. I mean, you sure had to connect the board to your Player through audio jack.)

Elads (author)2014-06-16

can you give me more detail about the LED Anode drive?

how do i need to soldering it?


minhthanh29mtp (author)2014-04-26

Fuse bit ?, thanks

Fuse settings
1, External crystal high Freq 16CK + 64 ms;
2, no memory lock features enabled
3, serial program download enabled

roscoe100 (author)2013-11-27

It's Cool!!
Can I get some tips for make a source..?
Recently, I'm trying to make a 8*8*8 LED cube audio spectrum.

Thank you for comments!! Thank you so much!!

thelostspore (author)2013-09-30

awesome work !

thank you

zx lee (author)2013-09-04

Hi, nice project that you have. May I know what is the concept in programming part?

Jestin_Cubetech (author)zx lee2013-09-04

MSGEQ7 is a 7 band audio spectrum ic.
in programming side, atmega 32 drive MSGEQ7 and make additional 3 software defined band[total 10 band ].
display system using fast scanning method.

About This Instructable




Bio: embedded system enthusiast ...
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