Music Visualiser Table





Introduction: Music Visualiser Table

This Instructable will hopefully give you all you need to put together a reactive music led table.

*** Following questions/suggestions/queries, I've added a full breakdown for making the LED array. I hope it helps those with questions. I've also added some pictures of the circuit boards - These are directly from Adafruit, and I give them full credit - what they do is awesome!***

I based it on the Music Visualiser at Music Visualiser - Adafruit. The code is from there, the circuit is from there - all I really created was a big led matrix, and put it into an Ikea table!

Really, I wanted to make a full arduino tetris table, but I had most of the spare parts and wood available to make this, so that's what I did.

As a picture is worth a thousand words, there are lots of pictures as I hate writing!

Step 1: Modify the Table

Start with an Ikea Lack table - the matt white was on special at £5, so that's what I used.

Draw a square on the table - mine was 40cm * 40cm - giving me 5cm2 sections.

Not knowing what the table was made of, I cut a small hole to look inside.

Happy with what I found, I cut the square, and removed the honeycomb cardboard inside.

Step 2: Realise Your Mistakes

Having cut the hole, I sectioned off the white square I'd just cut out.

I then glued the triangle I'd cut back in place. Oops.

Then section off the board into 5cm2 pieces.

I made template for the led holes- yes it's an old rail ticket, and marked the holes.

Drill loads of holes and fill with leds.

Take a picture with all the leds in place. Feel good about what you've done.

Step 3: Making the Matrix Grid

I got some white laminated hardboard I found in the garage and cut strips. The height was based on the depth of the table. There weren't measurements - it was done by eye.

I then used the bandsaw to cut the intersection holes. I then used the kids 'gloopy glue' (pva!), to stick reflective photopaper to the other side of the hardboard. I used a craft knife to cut this to size once dry.

I assembled the pieces and glue-gunned them into place.

Step 4: Creating the Led Matrix

This is making a very large version of the common cathode matrix found in the attached datasheet.

Firstly, cut some wires, and strip them, lots of them - I suggest you buy a wire stripper, I did and it made it so much easier! Once you think you've got enough, cut some more! You'll need 56 black wires and 112 red wires. Each should be about 7 to 8 cm long, but this will vary depending on your array, so just check before you cut all of them. As you'll see in one of the first pictures, I placed a marked piece of paper on my table, laid the wire along it and cut it into strips. This made the pieces the same length.

Next, to save my fat fingers whilst soldering, I twisted the wires into lengths of 7 pieces of wire - this was so I could solder the wires without trying to hold multiple wires at once.

*** to make the next bit slightly clearer, I've added some diagrams that should highlight which wires are connecting where***

Having made the board with the holes,

Insert the LEDs in the back-side of the board and bend the legs over so the cathodes touch, but the anodes are separate.

Solder all the cathodes together using the black wires.

Solder all the anodes together using the red wires.

Step 5: Connecting the Circuitry

Connect your newly created array as the diagrams show.

The pins on the matrix connect directly to the circuit board. I've put the pinout on the board so you can see which pins are which.

I've also shown the circuit diagram that has come from Adafruit, but I've made one change - the GND connection from the microphone goes to a different GND connection than the LED array. I found that the microphone output was getting 'corrupted' if it was connected to the same GND and the output of the LED array was garbage.

Test the matrix and circuit as in the video.

Step 6: Complete the Table

Get a piece of perspex the same size as the matrix, and cover it in frosted window film. If you can find pre frosted perspex then this may save you some effort. For added diffusion, I used some greaseproof paper as well.

I cut a hole in the bottom of the table to allow a usb cable to fit through.

Slide the matrix into place.

Glue to plastic top in place.

Your table is now complete.



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    Hi! I´ve completed this project, but I have a problem. The green LED´s don´t shine with a good intensity, it´s like they are underpowered. Does somebody have the same problem? Thanks!

    What are the (gray wires) connecting from the cathode and anode wires to the LED Matrix?

    I can't download the mov file, it's forbidden. Can you correct?


    hello it does not work, can someone help me?

    I can´t seem to turn on the table!! Is is almost done but we burn the microphone so we are using a regular one...but it´s not working!! We have to present our work by 5 of jully!! Can someone help us please?


    I can i get your email please? I need some help for a school project!! It is almost done but the programing is a little difficult!!

    Hey man I need some help I bought a single colour matrix instead of the multicolured one, I tried using your wiring diagram but it didn't work do you know how I can make it work?

    Here's a quick parts list.

    UK Parts list:
    Maplin Order Codes:
    N30KU - Arduino Main Board (Another smaller clone would probably work)
    N74DQ - Adafruit Bicolour LED Display with backpack (although you don't use the led array - you only use the multiplexing chip, but you can't buy it separately)
    A87RK - Adafruit Electret Microphone

    (Possibly found cheaper elsewhere)

    Ikea Order Code:
    200.114.13 - Ikea Lack Side Table

    1 * 16" * 20" clip frame (used for the perspex on top)

    4007386259721 - Self adhesive window frosting (for frosting the LEDS)
    5022652560188 - White hardboard - for creating the grid

    MISC - (what I had already)
    LEDS - 64 * red
    LEDS - 64 * green (green + red = amber)
    Baking paper - used for the diffusing the leds before the frosting.
    You may not need the baking paper if you are using diffused LEDs. Mine weren't diffused so without the baking paper created dots in hte perspex.
    USB cable.
    Cable to connect all the LEDS together
    White photo card - to coat the other side of the white hardboard.

    Stanley knife
    Hot Glue Gun
    Large ruler

    What thickness cable did you use and where the best and cheapest place to get a reel of it?

    I used standard equipment wire. I normally use as they're pretty good on prices. The unit only draws minimal current, so any cable capable of carrying 1A is more than over specified.