# Cardboard Desk Lamp

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Cardboard might seem like an odd material for a desk lamp, but with a low-heat LED bulb this 15" lamp can shine all night in glorious maker style. It's light, it's sturdy and it's flat-pack. What's not to love?

I originally designed this lamp to go on my own desk in the Instructables Lab, but due to popular demand I've had to make a few more. It's now available on the Instructables Store. I hope you like it!

I designed the lamp using Autodesk 123D and Autodesk 123D Make, then cut the parts using a laser cutter.

Here's how it all fits together:

## Step 1: Designing the Lamp Model

I started by designing a 3D model of the lamp using Autodesk 123D, which is freely available online.

To make a cross section of the lampshade, I used the Draw tool and the 3-Point Arc tool. Notice the grooves on the inside of the lamp; they're carefully sized to hold the electrical lamp components in place once the lamp is assembled. Everything else was just roughly estimated and tweaked as needed.

To turn the cross section into a 3D object, I used the Revolve tool. This tool spins a profile around an axis of your choice, producing an object with rotational symmetry.

I made the stand using a combination of hand-drawn splines and hemispheres, adjusting it until it looked sufficiently lampy. At the time of writing, Autodesk has not yet included a tool for accurately measuring the lampiness of a 3D model, so I had to judge that entirely by eye.

I joined the two parts together using the Combine tool (set to Join mode), then exported the object as an STL file. I've included the STL file here, with 1 STL unit equal to 1 human inch.

## Step 2: Slicing the Lamp in 123D Make

I used a preview build of 123D Make to deconstruct the 3D model into a series of radial slices.

In case you haven't heard me rave about it before, 123D Make is a free app that does one thing and it does it extremely well. It takes any 3D model you give it and quickly lets you convert it into 2D vectors that can be cut from sheet material. At the moment, the publicly available version only allows you to perform simple slicing and to create perpendicular interlocking waffles, but future releases will allow for radial slicing, surface paneling, complex joint-making and a large handful of other cool things. With a bit of luck, these updates will appear online within the next couple of months. Watch this space!

Once I'd adjusted the radial center of my grid to align with the center of the lampshade, I fiddled with the number of slices and the material thickness until I had something that could support its own weight when made from cardboard.

## Step 3: Laser Cutting the Parts

Having exported my 123D Make project as a series of EPS vector files, I paid a visit to my old friend the laser cutter. After a few brief pleasantries from me and an extended grumble from it, the laser cutter presented me with a pile of numbered cardboard pieces.

## Step 4: Assembling Around the Bulb Socket

The trick to assembling any 123D-Made structure is picking the right place to start. It's very tempting to just start slotting everything together willy-nilly, but you'll soon find yourself left with a pile of pieces that you can't join to the rest.

For my lamp, I started in the center of the lampshade and worked my way out, including the lighting fixture from the very beginning. I bought the lighting fixture pre-assembled at a local hardware store, so I didn't need to do any soldering or rewiring to get it to work safely.

The shade is made from 24 radial slices, 2 of which also form the spine of the stand. Here you can see the first two slices in place.

Look, it's already starting to resemble a lamp! I love it when you can see where a kit's going half-way through finishing it.

## Step 6: Testing With a Bulb

I took this opportunity to test out the kit with a lightbulb. Due to the risk of potential fire, it's crucial to use a low-heat bulb for this. Seriously. Fire's great, but not when it's unexpectedly galloping its way across your office. Are we clear on that? Good.

I connected an LED bulb and left it in place for a couple of hours, keeping an eye on it in case of unwanted conflagration (see above). I was pleased to find that the bulb stayed cool enough to handle and the cardboard showed no signs of singeing.

With a few more components added, the lamp looked like something between a desk light and a cardboard ray gun.

## Step 8: Completing the Assembly

Next, it was just a matter of slotting in all of the other pieces. At this stage, it reminded me of an Apollo landing capsule. What can I say? My mind wanders while I'm playing with cardboard.

## Step 9: The Finished Lamp

The assembled lamp has a 10" circular base and stands at 15" in height. So far, I'm very happy with its performance as a lamp: It doesn't fall over, it doesn't catch fire and it lets me see things in an otherwise dark room. As an added bonus, I get to enjoy watching people do double-takes as they walk past my desk.

As mentioned before, you can now buy the lamp from the Instructables Store!

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## 60 Discussions

this seems like a fire hazard

what is thickness of board used and in design

you can give me the working plans of this lamp?

My email: brayanalejandro@outlook.cl

i need the pdf files complete somebody can send me the files? please

hello I wanted to run your own lamp 3d but unfortunately in the drawings is missing some pieces. Could you send me the complete design thanks

I downloaded your eps files and just wanted to verify one thing. The eps with the single part in it (part 0) is not on top of the "canvas" in the file. I'm assuming that makes no difference when attempting to print?

A fair point. As I mentioned in Step 6, this has only been tested with low-heat LED bulbs. I suspect that using it with a normal bulb would lead to... interesting lighting effects.

Indeed. Needless to point out, but there are a certain number of people who lack the ability to read directions....or warning labels, either, for that matter. I'm just doing my part to keep those folks from burning down their homes.

.eps file is not opening,can you plz upload file fresh in pdf or eps.so i can cut on laser cutter