Download pdf - LED Cube 4x4x4

Amazing 3 dimensional LED display.

64 LEDs makes up this 4 by 4 by 4 cube, controlled by an Atmel Atmega16

microcontroller.

Each LED can be addressed individually in software, enabling it to display

amazing 3d animations!

8x8x8 LED cube now available, by popular demand:

http://www.instructables.com/id/Led-Cube-8x8x8/ (http://www.instructables.com

/id/Led-Cube-8x8x8/)

Related

(http://cdn.instructables.com/FJN/F0KM/FE7ITU05/FJNF0KMFE7ITU05.LARGE.jpg)

(http://cdn.instructables.com/FHK/MB9E/FE7ITU15/FHKMB9EFE7ITU15.LARGE.jpg)

(http://cdn.instructables.com/FB1/NTXL/FE7ITU16/FB1NTXLFE7ITU16.LARGE.jpg)

About This Instructable

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I like microcontrollers and LEDs :D

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LED Cube 4x4x4 by chr (/member/chr/)

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LED Cube 4x4x4 http://www.instructables.com/id/LED-Cube-4x4x4/?ALLSTEPS

1 of 20 19.04.2014 18:13

Step 1: What you need

First of all, you need quite a bit of time to solder together 64 leds ;)

Knowledge list:

Basic electronics and soldering skills

Know how to program an AVR microcontroller - I will not cover that in this

instructable.

Component list:

Protoboard. The type with copper circles.

Atmel AVR Atmega16 microcontroller

Programmer to program the Atmega16

64 Leds

2 status leds. I used red and green. (optional)

Max232 rs-232 chip, or equivalent.

16 resistors for leds. (100-400ohms) will get back to this.

2x resistor 470 ohm. for status leds

See More (/tag/type-id/?q=)

(http://cdn.instructables.com/F6B/VMIP/FE7ITU4W/F6BVMIPFE7ITU4W.LARGE.jpg)

4×4×4 Led Cube (/id/Led-

Cube-8/)

by pbajusz (/member/pbajusz/)

Led Cube 4x4x4 (/id/Led-

Cube-4x4x4-6/)

by bajgik (/member/bajgik/)

4x4x4 LED cube, with

MSP430, using only 3 pins

(/id/4x4x4-LED-cube-

with-MSP430-using-only-3-

pins/)Beginner's Guide - AVR

Programming

(/id/Beginners-Guide-

AVR-Programming/)

LED Cube 4x4x4

+ Collection I Made it! Download 11 Steps Favorite/id/LED-Cube-4x4x4/)


2 of 20 19.04.2014 18:13

1x resistor 10k

4x resistor 2.2k

4x NPN transistor BC338 (or other transistor capable of switching 250-ish

mA)

1x 10uF capacitor

1x 1000uF capacitor

6x 0.1uF ceramic capacitor

2x 22pF ceramic capacitor

1x crystal 14.7456 MHz

2x tactile button

optional pwr switch

connector for 12v power

optional connector for 5v power

Step 2: Multiplexing

(http://cdn.instructables.com/F7K/DAPC/FE7ITU7R/F7KDAPCFE7ITU7R.LARGE.jpg)


+ Collection I Made it! Download (/id/LED-Cube-4x4x4/?download=pdf) 11 Steps Favorite (/id/LED-Cube-4x4x4/)


3 of 20 19.04.2014 18:13

How to control 64 LEDs without using 64 individual wires? Multiplexing!

Running a wire to the anode of each led would obviously be impractical, and

would look really bad.

One way to get around this, is to split the cube into 4 layers of 16x16 LEDs.

All the LEDs aligned in a vertical column share a common anode (+).

All the LEDs on a horizontal layer share a common cathode (-).

Now if i want to light up the LED in the upper left corner in the back (0,0,3), I just

supply GND (-) to the upper layer, and VCC (+) to the column in the left corner.

If i only want to light up one led at a time, or only light up more than one layer at

the same time.. this works fine.

However, if I also want to light up the bottom right corner in the front (3,3,0), I

run into problems. When I supply GND to the lower layer and VCC to the front

left column, I also light up the upper right led in the front (3,3,3), and the lower

left LED in the back (0,0,0). This ghosting effect is impossible to workaround

without adding 64 individual wires.

The way to work around it is to only light up one layer at a time, but do it so fast

that the eye doesn't recognize that only one layer is lit at any time. This relies on

a phenomenon called Persistence of vision (http://en.wikipedia.org

/wiki/Persistence_of_vision).

Each layer is a 4x4 (16) image.

If we flash 4 16 led images one at a time, really fast, we get a 4x4x4 3d image!

Step 3: Making the cube, template

(http://cdn.instructables.com/FF7/MKMO/FE7ITU9F/FF7MKMOFE7ITU9F.LARGE.jpg)




4 of 20 19.04.2014 18:13

Soldering grids of 4x4 LEDs freehand would look terrible!

To get 4 perfect 4x4 grids of LEDs, we use a template to hold the them in place.

I wanted to make the cube as easy as possible to make, so I chose to use the

LEDs own legs as much as possible. The distance between the lines in the grid

was decided by the length of the LED legs. I found that 25mm (about an inch)

was the optimal distance between each led (between the center of each led that

is!) to enable soldering without adding or cutting wire.

Find a piece of wood large enough to make a 4x4 grid of 2,5cm on.

Draw up a 4x4 grid of lines.

Make dents in all the intersects with a center punch.

Find a drill bit that makes holes small enough so that the led will stay firmly

in place, and big enough so that the led can easily be pulled out (without

bending the wires..).

Drill the 16 holes.

Your ledcube template is done.

(http://cdn.instructables.com/FEW/92OM/FE7ITUDA/FEW92OMFE7ITUDA.LARGE.jpg)

(http://cdn.instructables.com/F7Q/Z5ZC/FE7ITUD6/F7QZ5ZCFE7ITUD6.LARGE.jpg)

(http://cdn.instructables.com/FIV/II0O/FE7ITUD7/FIVII0OFE7ITUD7.LARGE.jpg)

(http://cdn.instructables.com/FY1/HMAK/FE7ITUD3/FY1HMAKFE7ITUD3.LARGE.jpg)

(http://cdn.instructables.com/F6X/1QON/FE7ITUD4/F6X1QONFE7ITUD4.LARGE.jpg)




5 of 20 19.04.2014 18:13

Step 4: Making the cube, solder the layers

We make the cube in 4 layers of 4x4 leds, then solder them together.

Create a layer:

Put in the LEDs along the back and along one side, and solder them

together

Insert another row of LEDs and solder them together. Do one row at a time

to leave place for the soldering iron!

Repeat the above step 2 more times.

add cross bracing in the front where the led rows are not connected.

Repeat 4 times.

Step 5: Making the cube, connecting the layers

(http://cdn.instructables.com/FRK/ITQH/FE7ITUFC/FRKITQHFE7ITUFC.LARGE.jpg)

(http://cdn.instructables.com/FYA/95UN/FE7ITUFO/FYA95UNFE7ITUFO.LARGE.jpg)

(http://cdn.instructables.com/FP7/H73Z/FE7ITUFB/FP7H73ZFE7ITUFB.LARGE.jpg)

(http://cdn.instructables.com/F3I/B9T2/FE7ITUHG/F3IB9T2FE7ITUHG.LARGE.jpg)

(http://cdn.instructables.com/FMT/HDF3/FE7ITUIE/FMTHDF3FE7ITUIE.LARGE.jpg)

(http://cdn.instructables.com/FT8/VFN5/FE7ITUH7/FT8VFN5FE7ITUH7.LARGE.jpg)

Show All 8 Items




6 of 20 19.04.2014 18:13

Now that we have those 4 layers, all we have to do is to solder them together.

Put one layer back in the template. This will be the top layer, so choose the

prettiest one :)

Put another layer on top, and align one of the corners exactly 25mm (or

whatever distance you used in your grid) above the first layer. This is the

distance between the cathode wires.

Hold the corner in place with a helping hand and solder the corner anode of the

first layer to the corner anode of the second layer. Do this for all the corners.

Check if the layers are perfectly aligned in all dimensions. If not bend a little to

adjust. Or re-solder of it's the height distance that's off. When they are perfectly

aligned, solder the remaining 12 anodes together.

Repeat 3 times.

Step 6: Choosing resistor values

(http://cdn.instructables.com/FA7/H3MI/FE7ITUJV/FA7H3MIFE7ITUJV.LARGE.jpg)

(http://cdn.instructables.com/F2S/5TH2/FE7ITUKJ/F2S5TH2FE7ITUKJ.LARGE.jpg)

(http://cdn.instructables.com/FRO/TLGD/FE7ITUKB/FROTLGDFE7ITUKB.LARGE.jpg)




7 of 20 19.04.2014 18:13

There are two things to keep in mind when choosing a resistor value for your

leds.

1) The LEDs

2) The AVR

The AVR has a maximum combined current rating of 200 mA.

This gives us 12mA to work with per LED.

You also don't want to exceed the maximum current your leds are rated to.

I used 220 ohm resistors on my cube. This gave me about 12mA per led.

Step 7: The controller

(http://cdn.instructables.com/F2V/NNF5/FE7ITUS0/F2VNNF5FE7ITUS0.LARGE.jpg)

(http://cdn.instructables.com/F4Z/XPGS/FE7ITUSF/F4ZXPGSFE7ITUSF.LARGE.jpg)




8 of 20 19.04.2014 18:13

The circuits controlling the led cube is described in the attached schematic

image.

The RS-232 interface is optional. and can be omitted. That is IC2 and all the

components connected to it. Future firmwares will enable PC communication..

Start by laying out all the components on you circuit board in a layout that

enable all the components to connect with a minimal amount of wires. If

everything fits, solder the circuit.

I won't give any more instructions on this, as the circuit probably will look very

different from cube to cube, depending on the size of the circuit board etc..

Information on how to wire the cube to the controller circuit is in the next step.

(http://cdn.instructables.com/FMY/FND2/FEAHE8UU/FMYFND2FEAHE8UU.LARGE.jpg)

(http://cdn.instructables.com/F1B/E4GN/FE7ITUU3/F1BE4GNFE7ITUU3.LARGE.jpg)

(http://cdn.instructables.com/FZ6/SWRG/FE7ITUU4/FZ6SWRGFE7ITUU4.LARGE.jpg)

(http://cdn.instructables.com/FK1/LGWS/FE7ITUU1/FK1LGWSFE7ITUU1.LARGE.jpg)

(http://cdn.instructables.com/F3P/62AA/FE7ITUVT/F3P62AAFE7ITUVT.LARGE.jpg)

(http://cdn.instructables.com/FC0/JDST/FE7ITUU2/FC0JDSTFE7ITUU2.LARGE.jpg)

Show All 8 Items




9 of 20 19.04.2014 18:13

Step 8: Wire up the cube

Pictures explain this better than words. Please see the pictures.

Step 9: Compile and program

You now have a led cube. To make use of it, it needs some software.

I have made a driver for rendering a 3d data space on the cube, and functions

to display some cool visual effects on the cube.

You can use my code, write your own or build on my code and make more

effects.

If you make your own effects, please send me the code. I'm eager to see what

you guys make!

To compile the program. Just open a command promt,

enter the directory with the source code

(http://cdn.instructables.com/F49/VMDD/FEAHE8V8/F49VMDDFEAHE8V8.LARGE.jpg)

(http://cdn.instructables.com/FLX/LQ3F/FEAHE8WG/FLXLQ3FFEAHE8WG.LARGE.jpg)

(http://cdn.instructables.com/F44/QU7A/FEAHE8WH/F44QU7AFEAHE8WH.LARGE.jpg)

(http://cdn.instructables.com/FA8/4EF1/FEAHE8WE/FA84EF1FEAHE8WE.LARGE.jpg)

(http://cdn.instructables.com/FES/6VDO/FEAHE8WF/FES6VDOFEAHE8WF.LARGE.jpg)




10 of 20 19.04.2014 18:13

type "make" on the command line.

If you want to use an ATMega32 instead of the ATMega16, just change the mcu

setting in the Makefile and recompile (type make). If you use the m32 and don't

do this step, the cube won't boot properly (the red and green lights will keep

blinking forever).

You should now have a file named main.hex in the source directory.

The next step will show you how to get that code into your cube.

4x4x4_ledcube-0.2.zip (/files/orig/FEM/AJUM/FJ1I6COK/FEMAJUMFJ1I6COK.zip)14 KB

4x4x4_ledcube.hex (/files/orig/F6J/RI6A/FJ1I6CP0/F6JRI6AFJ1I6CP0.tmp)19 KB

Step 10: Program the microcontroller

If you are experiencing problems with speed and/or some LEDs not

lighting up. Please read this step carefully.

(http://cdn.instructables.com/FRY/TJRN/FNI43W6A/FRYTJRNFNI43W6A.LARGE.jpg)

(http://cdn.instructables.com/FAN/C5WI/FNI43W66/FANC5WIFNI43W66.LARGE.jpg)

(http://cdn.instructables.com/FPH/6OK3/FNI43W67/FPH6OK3FNI43W67.LARGE.jpg)

(http://cdn.instructables.com/F5T/HHB8/FNI43W65/F5THHB8FNI43W65.LARGE.jpg)

Show All 8 Items




11 of 20 19.04.2014 18:13

To program the microcontroller, I use avrdude and the USBTinyISP

programmer.

http://savannah.nongnu.org/projects/avrdude/ (http://savannah.nongnu.org

/projects/avrdude/)

http://www.ladyada.net/make/usbtinyisp/ (http://www.ladyada.net

/make/usbtinyisp/)

http://www.adafruit.com/index.php?main_page=index&cPath=16

(http://www.adafruit.com/index.php?main_page=index&cPath=16)

My examples will be on an Ubuntu Linux system. The procedure should be

pretty much identical on Windows, but I can't help you with that. If you use

another programmer, read thet manual for that programmer and avrdude.

First off, Let's just see if we can make contact with the AVR.

Connect the programmer to your cube and your computer.

The command is "avrdude -c usbtiny -p m16", wherer -c specifies the

programmer, and -p the AVR model. You can see the output in the images

below.

Now, upload the firmware: "avrdude -c usbtiny -p m16 -U flash:w:main.hex".

By now, the cube should reboot and start doing stuff. It will be running at 1mhz

(very slowly) using it's internal oscillator. And some of the leds won't work,

because some GPIO ports are used for JTAG by default.

To enable the external oscillator and disable JTAG, we need to program the

fuse bytes:

run "avrdude -c usbtiny -p m16 -U lfuse:w:0xef:m"

and "avrdude -c usbtiny -p m16 -U hfuse:w:0xc9:m".

Be carefull when doing this step! If you get it wrong, you can permanently

destroy your microcontroller! If you are using another microcontroller than the

ATMega16, be sure to read the datasheet carefully before changing the fuse

bytes!

After writing the correct fuse bytes, the cube should reboot and start

operating at regular speed with all leds operational.

Enjoy your new cube :D

Step 11: Go large - 8x8x8

(http://cdn.instructables.com/FHA/TS97/FNI43W6Y/FHATS97FNI43W6Y.LARGE.jpg)

(http://cdn.instructables.com/FII/OZYZ/FNI43W6X/FIIOZYZFNI43W6X.LARGE.jpg)




12 of 20 19.04.2014 18:13

After making this quite fancy 4x4x4 cube, I have also made an enormous 8x8x8

cube. I'll make an instructable for that one when I have time. Meanwhile, see

pictures :-)

(http://cdn.instructables.com/FSF/VQ02/FJ34CXFQ/FSFVQ02FJ34CXFQ.LARGE.jpg)

(http://cdn.instructables.com/FF4/Z4KP/FJ34CXFP/FF4Z4KPFJ34CXFP.LARGE.jpg)

(http://cdn.instructables.com/FTP/AAW8/FJ34CXFG/FTPAAW8FJ34CXFG.LARGE.jpg)




13 of 20 19.04.2014 18:13

Make Comment

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4 months ago Reply (CNYDXRSHPAOZ0NR)

(/member

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3 months ago Reply (C754VZMHPOM34Q4)

(/member

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12 days ago Reply (CJWPL1KHTOUDLA0)

You can find the 8x8x8 version here: http://www.instructables.com/id/Led-

Cube-8x8x8/ (http://www.instructables.com/id/Led-Cube-8x8x8/)

Please rate this instructable if you like it! :)

egange (/member/egange/)

I recently made the cube. but i only have arduino to control it. Does anyone

converted chr animation code to arduino? please helpp...

Steve25 (/member/Steve25/) egange

I gues not, but why don't you buy an usbasp from ebay? It will cost you

only 3 euro!

kchauhan (/member/kchauhan/) Steve25

Sir can we use atmega 16 A instead

of given above as I am only gettin A

one on ebay so.... Please rply sir

egange (/member/egange/) Steve25

i already have asbasp programmer but i don't have Atmega32-16PU 40

pins. only atmega328 w/ 28 pins. im quite new in programming micro-

controllers. i need to traslate chr code to be used in atmega328 or arduino.

please helpp. :D

kchauhan (/member/kchauhan/)

Sir What is the total cost of whole project in INR ?

http://cdn.instructables.com/FA3/T0O5/FJ34CXFE/FA3T0O5FJ34CXFE.LARGE.jpg)

LED Cube 4x4x4



14 of 20 19.04.2014 18:13

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12 days ago Reply (CW8XKX0HTOUDLA2)

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kchauhan (/member/kchauhan/)

Sir What is the total cost of whole project in INR ?

waka2007 (/member/waka2007/)

I want to make this for my first real project. I was wondering how important are the

transistors and the capacitors. I have seen cubes that run with just LEDs and

resistors so why the extra stuff?

mpick92 (/member/mpick92/) waka2007

The short answer is because he built

his development board from scratch.

If you look at an Arduino, all those

components are placed on the board

when it is manufactured (and then

you have the input/output pins to

use).

temi (/member/temi/)

can any one post me the 4x4x4' 'compiled' hex.? i cannot compile it withStudio6.0,

talk less of programming it with my TL866A.

alexcavazos67 (/member/alexcavazos67/)

I just published a 3D-printable template for this project. I hope it is helpful to

anyone out there.

http://www.thingiverse.com/thing:229633 (http://www.thingiverse.com

/thing:229633)

(http://cdn.instructables.com/F9F/JA8R/HQLVMT9M

/F9FJA8RHQLVMT9M.LARGE.jpg)

wildatheart123 (/member/wildatheart123/)

Hi guys

I built the circuit without the rs232-interface and programmed the (above

attached) hex-file to the chip with a separate programmer. The status-leds are

working, but none of the led's are lighting up. I measured the outputs (at cathode

out from transistors and anode) and was surprised when my multimeter gave me

a negative voltage.

Has anyone experienced the same problem ever?

Steve25 (/member/Steve25/) wildatheart123

I build it to without the rs232

interface and did not have that

experience. Did you connect

you're transistors right? My

transistor had an TO-92 package

(CEO). I nearly connected them

wrong.




15 of 20 19.04.2014 18:13

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wildatheart123 (/member/wildatheart123/) Steve25

Hi Steve, You were right. I

connected the transistors

wrong. Now some Leds are

lighting up but they only go

on for about 10 secs and off

again. Did you program the

chip in circuit as in this

instructable or on a separate

programmer?


Yes i followed all steps in this

guide. When i uploaded the

program, 4 rows didn't light up.

But after setting the fusebits it

worked perfect.

If you also followed all the steps

there might be an problem in

you're wiring.

wildatheart123 (/member/wildatheart123/) Steve25

Hi Steve

It's running now! I indeed set the

fuses wrong. thanks for your help!

all the best


Great to hear! I'm happy that you

got it working.


I build it to without the rs232

interface and did not have that

experience. Did you connect

you're transistors right? My

transistor had an TO-92 package

(CEO). I nearly connected them

wrong.

erdiegange (/member/erdiegange/)

Can i use 16Mhz Crystal instead of 14.7456?

I just cant wait if ill buy the exact 16Mhz that i need. xD

manoulis (/member/manoulis/)

Hey dude, nice work there, I'm trying really hard to make one myself, I have

entered the atmel site but I see two different types of Atmel AVR Atmega16

microcontroller in PDIP.

Here is the link of the site too: http://www.atmel.com/devices/atmega16.aspx

Can you please tell me which one should I order ??? Thank you in advance

Steve25 (/member/Steve25/) manoulis

I bought the atmega16-16PU. But you can use the atmega16-8PU aswell

so the choice is yours




16 of 20 19.04.2014 18:13

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Steve25 (/member/Steve25/)

male connector 2x5 rm 2,54mm? Bought it at conrad

Miguel3105c (/member/Miguel3105c/) Steve25

thanks really appreciate.

Miguel3105c (/member/Miguel3105c/)

hi guys as am new in electronic i would like to know from where do you get the

socket for the AVR PROG coz i really cant find one and the name plz thanks

Miguel3105c (/member/Miguel3105c/)

hi guys as am new in electronic i would like to know from where do you get the

socket for the AVR PROG coz i really cant find one and the name plz thanks

sadomukas (/member/sadomukas/)

Thank all for answers. Now I have othe trouble, not all of leds is working and

some always lithing very brightly.

Steve25 (/member/Steve25/) sadomukas

Hi sadomukas. I can't tell what's

causing this problem i only can give

you suggestions. First check out

you're connections again. If that's all

good then check you're resistor

value's. If the value's are good as

well then check you're leds. There is

a possibility that you're leds are

damaged. To check this out, take

out you're volt meter and put it on

bleep ore diode. You're Leds should

light up when you touch them. If

they do not then they are broken

and should be replaced.

If this is all good then the last thing i

can think of is that you broke you're

chip again.

Hope this will help you out good

luck again!

sadomukas (/member/sadomukas/)

Hi everyone. Please help for me. I have done this cube, but when i try to

programme it LM 7805 makes verry hot ant computer cant connect to atmega16

im using programmer: http://www.ebay.com/itm/1PCS-USBasp-USBISP-3-3V-5V-

AVR-Programmer-USB-ATMEGA8-New-/261021924011?pt=LH_DefaultDomain_0&

hash=item3cc61e7aab

I have destroyed 4 atmegas16 and i spended a lot of money. please help for me





17 of 20 19.04.2014 18:13

5 months ago Reply (CRY5X7QHNHOR0QP)

(/member

/Steve25/)

(/member

/Steve25/)

5 months ago Reply (COSZEHUHNHOR0PD)

(/member

/Steve25/)

6 months ago Reply (CI8JYXLHM8DLQ2V)

(/member

/mrdrako/)

6 months ago Reply (C9EZ6FFHLZRVB3T)

(/member

/aneam

%C5%A3u/)

7 months ago Reply (C61YKDPHL94I9D4)

An another

suggestion if you

use you're usbasp

with windows you

should install a

driver for it. This

can be the reason

why you can't

connect you're

computer to you're

atmega16! This

driver can be found

at

http://www.fischl.de

/usbasp/. This

driver is called

usbasp-

windriver.2011-05-28.zip.

Good luck and

hopefully you can

get it working!


Hi sadomukas. The firsting you

should check are you're

connections? Is everything

connected right to you're

ATMEGA16?

If you are programming don't

connect you're 12v power supply!

You're programmer already giving

5v! If you do you can cause alot of

damage to you're chip and circuit!

Did you change the programmer

in you're program to usbasp

instead of usbtiny?

And at last did you use the right

resistors?

Hope this suggestions will help

you out! Goodluck

Steve25 (/member/Steve25/)

Hey chr i got a couple of questions. I want to build this cube but why did you put

in jumper 3? Its not standing on you're components list so can i leave it out? And

why do you have connected a connector to the 323max ic? Well hope to get a

respond so i can start building!

mrdrako (/member/mrdrako/)

I made a scrolling font that works on this 4x4x4 cube. By making the font 4 wide

by 5 tall, and scrolling vertically, it becomes recognizable. It required a new file,

font.c, and some changes/additions to draw.c, and you have to add an #include

line in main.c. If you are interested, it can be found on github here:

https://github.com/mrdrako/4x4x4-LED-Cube/

aneamţu (/member/aneam%C5%A3u/)

Thanks a lot for this instructable. I built one too and it's running your code.




18 of 20 19.04.2014 18:13

(/member

/mrdrako/)

7 months ago Reply (CFGMPPPHKZAVHVQ)

(/member

/mrdrako/)

7 months ago Reply (CYM89UUHKZ9L711)

(/member

/tboultwood1/)

8 months ago Reply (C6QYUV5HKM95ZG8)

(/member

/Cubytus/)

8 months ago Reply (CZAZR4XHK1DG0FT)

(/member

/Cubytus/)

8 months ago Reply (CSC1SJPHK483OZB)

(/member

/xsandman.32/)

8 months ago Reply (C049TLUHJKBK6Y3)

mrdrako (/member/mrdrako/)

Awesome job. I just finished building mine. I have one issue, hoping someone can

make a recommendation on. The column that connects to pin 29 of the chip does

not work. There is continuity from the pin to the column, so it's not a break in the

circuit. I am not sure how to troubleshoot. Any ideas? Other than that column, it

works beautifully.

mrdrako (/member/mrdrako/) mrdrako

Disregard. For some reason the pin was not making contact in the socket.

Removed and reseated the chip and it works!

Now I can start playing around!

tboultwood1 (/member/tboultwood1/)

For the metal bracing, what sort of wire did you use? Not sure on what to buy for

that :S Great guide!

Cubytus (/member/Cubytus/)

Would it be possible to power a 5x5 cube using the same AVR, but using different

code? How would that be possible? regards

Cubytus (/member/Cubytus/)

Hi,

I want to start constructing this 4x4x4 monochrome LED cube since I have a ton of

big yellow LEDs I can't find any use for. I just noticed that I still have a plenty of

LEDs, so would I be able to drive a 5x5 cube with slighty changing the code of the

Atmel AVR, without any other change? Or does it need a bigger power supply?

xsandman.32 (/member/xsandman.32/)

Hey, just wanted to say thanks for this incredible instructable! I finished my cube

a couple weeks ago (nearly) flawlessly by following these directions. Next up: an

8x8x8, and learning to etch the pcb in an attempt to make the circuit footprint

smaller.

LED Cube 4x4x4



19 of 20 19.04.2014 18:13

(/member

/obsidianjaguar/)

9 months ago Reply (C37JOX2HIUXB2FN)

(/member

/viveksridhar/)

10 months ago Reply (CDIJRW3HI3TJSHQ)

Make Comment

obsidianjaguar (/member/obsidianjaguar/)

Hi there , I just built this version of a rgb 4x4x4 cube

http://www.freetronics.com/products/cube4-4x4x4-rgb-led-cube

Since it uses Ardunio the code is quite different ... Is there a way to Translate your

animations , so that they would work with the cube I built?

viveksridhar (/member/viveksridhar/)

Can you let me know if I'm calculating the resistor values for the transistors

correctly?

Since there are 16 LEDs connected to each transistor, the current limiting resistor

for those LEDs would be 40 ohms.

If I'm using a 2N2222 transistor (Hfe = 100), with the base voltage at 5v, wouldn't

the base resistor be 312 ohms?

Sorry if this is a stupid question, but I'm just trying to understand how you get the

resistor values and how they relate to the transistor and everything.

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20 of 20 19.04.2014 18:13