Instructables
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I wanted a new table lamp, but found a regular table lamp rather uninteresting. I wanted to create a lamp with which it is possible to readjust the shape and size.

The table lamp exists out of eight cubes, with which you can build different shapes. Each cube has four bright 0.5 watt straw hat LEDs inside.

This lamp was easy to make, but consumes a lot of your time.

The light output depends on the total amount of cubes that you use. If you use just one cube you have little light (for example as a night light), if you use all the cubes you have more than enough light to light up a room.

The overall cost of this project was low, except for the neodymium magnets (40 $), which seem to have risen in price the last year.

 
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Step 1: Materials and tools

Picture of Materials and tools

Materials:

  • 40   0,5W straw hat LEDs 
  • 8 bridge rectifiers
  • 8   6.8 Uf  > 12v capacitors
  • 16   39 Ohm 1W resistors
  • Perfboard
  • Conductive silver
  • White acrylic sheet
  • 192 nails
  • 192  6 mm by 5 mm round neodymium magnets
  • 12v power supply 2 amp
  • Toggle switch
  • Wooden board (9 mm thick)

Tools:

  • Wood glue
  • Super glue
  • Jig saw
  • Miter saw
  • Sand paper
  • Wood clamps
  • Drill
  • Drill bit  3 mm, 6 mm
  • Hole saw 67 mm,  74 mm
  • Solder
  • Solder iron

Step 2: Sawing, drilling and gluing

Picture of Sawing, drilling and gluing
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Saw 48 squares of 10 cm by 10 cm out of the wooden board.

Saw a 45 degree corner off each side of each cube.

Draw a cross in each square and make a mark 1.3 cm from each corner. Drill a 3 mm hole in each mark, and drill a 6 mm hole 3 mm deep on top of that.

Drill a 67 mm circle in the middle of each square.

Use wood glue to glue five pieces together so that you get cubes with one side missing.


Step 3: Drilling acrylic circles

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Saw 48  74 mm circles out of white acrylic using a hole saw. 

Use super glue to glue the white acrylic circles on the inside of each cube and on the eight remaining squares.

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mosmond2 months ago
Fantastic project! I *really* love the modular design. It makes me wonder what other applications this could be used for, besides lighting. Speakers? Cooling fans? Drive motors? I'll be obsessing over this one for a while!
aschmidt133 months ago

awesome

nerdtoob5 months ago

Hey I noticed that you said a 6.8uf 12v resistor but on the picture it is a 6.8uf 35v resistor and I cant find a 6.8uf 12v resistor anywhere. could you post a link?

nerdtoob nerdtoob5 months ago

Never mind figured it out it says greater than 12v

thebuckeyeguy9 months ago
Very ambitious and well executed. Good Job!
i wondered where the wires from +ve and -ve corners go, on the mini pcb's inside each cube.
Kirgdeking1 year ago
Hello, I have a question: instead of the acrylic sheet, can i just use a 2mm PVC sheet of plastic as i am on a low budget?
mganpate1 year ago
its very nice project kindly send us pdf pls pls on mahesh.gan.143@gmail.com.
Hi
Your project is so awesome that i decided to take it, althought i have no experience in wood or elektronic work. I've got one question, what was the thicknes of the acrylic scheet ?
Thanks in advance
HHarry (author)  Saakaszwili1 year ago
Thanks
The acrylic sheet is about 3 mm thick.
Cupofblack2 years ago
This is pretty awesome. Sorry if this question seems obvious, I'm new to circuits:

Do the magnets have an effect on the current, and is that why you alternate them? And if they do, does it matter what how you orient them?
Stoffo2 years ago
Hello! Thanks for your comment on the magnets, this has made things easier.
One question remains though: I'm having trouble finding the good LEDs required for this project. You said: "0,5W straw hat LEDs", but I'm finding many different LEDs with all different lighting strengths. Could you possible give a link or name of the type of LEDs you have used? Or maybe the amount of lumen emitted from these LEDs?

Thanks in advance,

Chris.
HHarry (author)  Stoffo2 years ago
These are the LEDs i used: http://www.benl.ebay.be/itm/220649093432?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 

But feel free to use any kind of led you want (resistor value have to be recalculated).
I used these straw hat LEDs because of its wide angle and high output.  
mxmega2 years ago
Hi,
A question regarding the circuit.

I can't quite understand how it works.In the picture, i see only 2 legs of the rectifier in picture of step 5 whereas in the picture in step 1, the rectifier has 4 legs. Are 2 of the legs cut off?

Also, does the capacitor used needs to have polarity for it to work?
Are both the resistors connected to the one leg of capacitor, and if so, does the other leg of capacitor connect to the rectifier? Because I can't see where the the parts are connected together.
Finally, when soldering the circuit to the cube, are all 4 of the legs shown in diagram at step 5 connected somewhere? If so, where?

I'm a complete newb in electronics, and if you can clarify this I'd be forever grateful.

Btw, awesome ible :)
thanks in advance
hi incredible ible !
im from aus and having trouble tracking down the magnets with the right dimensions. and suggestions for me as i really want to make this lamp. its great :)
HHarry (author)  curious youth2 years ago
Cheers ! as soon as i get all the money togeth (im on a student budget) this will be the stand out in my room. im going to work on making it a standalone lamp that i dont need a desk for. ill post pictures when i finish (who knows when that will be though)
Stoffo2 years ago
Hello! A very nice project indeed.
I'm planning to try this myself, but I have one question regarding the magnets. Is het neccessary to have this exact dimensions, or can you do with anything a big smaller or less tall?
With other words, do you know how strong the magnets have to be, so that all arrangments are possible and the cubes don't fall down?

Thanks in advance!
HHarry (author)  Stoffo2 years ago
You could change the magnet size. My magnets can hold 1,2 kg each. I find this necessary when you add more magnets to the sides.
jlundquist2 years ago
what would this look like if the whole cube was made from the acrylic instead of wood? would the wires and circuits show through as shadows?
HHarry (author)  jlundquist2 years ago
Yes the shadows would shine through. But maybe you could put sticks in the corners pointing to the middle where the circuit and the leds could be, so the light is not obstructed by the wires.
anglerfish2 years ago
This is a wonderful idea. Perfect gift for my college bound kid to use for his dorm room. I am going to try this one.
HHarry (author)  anglerfish2 years ago
Tanks!
That's amazing!
HHarry (author)  Penolopy Bulnick2 years ago
Thank you!
rock09112 years ago
I don't know that why there is a bredge rectifier.
did you mine your connections have AC all the time?
HHarry (author)  rock09112 years ago
I used a DC power supply. The bridge rectifier is placed in the circuit to make sure it does not matter which way you place the cubes together.
Mr. Boo2 years ago
What are the specs for the bridge rectifier? When I look them up online I see many different types.
HHarry (author)  Mr. Boo2 years ago
Almost any rectifier would be fine, but over 2 amp  is just overkill for this application. I used this one: http://www.ebay.com/sch/i.html?rt=nc&LH_PrefLoc=2&_nkw=W10M%20bridge&_fln=1&_trksid=p3286.c0.m283

Mr. Boo HHarry2 years ago
OK, thanks for the info!
jlundquist2 years ago
How do you make the sixth side power the cube?
HHarry (author)  jlundquist2 years ago
The sixth side is a bit tricky.
I used two methods:
The first method is soldering short wires to the nails inside the box and then to the single nails of the leftover square, finally glue the cover to the box. This is the best (recommended) method.
I started the second method after I finished five cubes. I call it the fast non-professional I just want this project to be done (not recommended) method. It goes like this: put the nails in the leftover square and glue it to the rest of the box. I was lucky to have a voltage on every nail.
Thats what i had in mind. also ive decided to tackle this project. but its my first time doing circuit work. any pointers? i comprehend the rest of it all even the wiring but as far as making a circuit i dont know anything.

thanks for the great project!
Hi jlunquist

If you look closely at the last image in Step 5 you will be able to make out how all the nails in one corner are soldered together and then connected to either +ve or -ve.

Does that help?

Cheers
Very nice post, HHary. I live in Brazil and I like to read instructables, but never done one project. This´ll be the first one. Congratulations!
HHarry (author)  alexandrelandim2 years ago
Thank you and good luck!
xprosario2 years ago
Very good project!
Sorry, but I know very little about electronics. I can ask a question: What is the task of the capacitor?
I did a simulation and the voltage drop is very evident in the brightness of the LED. What might that be?
Thank you very much.
HHarry (author)  xprosario2 years ago
Thanks! The capacitor is not strictly necessary, i just put them in the circuit for smoothing out the voltage and to catch some voltage spikes.
Thanks for your answer!
In what may be the voltage drop? Surely it is the bridge rectifiers.
I have to find a resistance that allows all LEDs glow like that, as from the fourth cube at a low light.
myyrhdyn2 years ago
This is amazing, going to try it as soon as I can. Thank's
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