Easiest LED Light Doodler/pen




Introduction: Easiest LED Light Doodler/pen

About: I'm a mechanical engineer with a passion for making things.

I know many others have submitted instructables detailing how to make an LED writer pretty easily but I thought I'd show some of you who may be just as lazy as I, how to make one in under two minutes with materials you're sure to find around the house.

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Step 1: Materials

All you need is:
a 3v button cell battery (cr2302)
an LED
about a 2 inch strip of wire
tape (vinyl insulating tape works best)

Step 2: Attach the LED

Tape the negative lead of the LED (the shorter side) to the negative side of the battery. Make sure that the positive lead is insulated from the positive side of the battery.

Step 3: Bend and Attach the Wire

Strip the wire completely. Bend the wire to give a relatively large contact patch for the switch. Ensure that you leave about an inch or so un-bent.

Tape the wire so that the un-bent portion touches the positive lead of the LED and the bent part hovers just over the slimest part of the battery.

Step 4: Fine Tune and Test

Now just fine tune the bend in the wire to ensure that when your not pressing on it the wire is not touching the top of the battery. The idea is that when you press down on the wire it completes the circuit, connecting the positive lead of the LED to the battery.

At first I thought this design would only be temporary and would only work for maybe an hour max before I would have to completely remake it but I actually found it to be surprisingly robust. Of course if you have a a two pin push button those are a little better.

You may be able to make the design even more sturdy by hot gluing or soldering the wires together but, of course, this makes it a little more complicated.

Now go out there and have fun drawing with light.

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    7 Discussions


    10 years ago on Step 3

    So how does it work? I took a light from those pens that when u unfold them, the light turns on so that u can see in the dark while u write. So does ur drawing stay in mid air. How can I do that with my little light thing. When I push this spring on both sides of the light it turns on. So can u help me make my drawings stay in mid air? I like urs. Simple cuz I don't have a soldering iron


    Reply 11 years ago on Introduction

    Yes very much inspired by the throwie but w/ an added push switch.


    Reply 11 years ago on Introduction

    Indeed! I was going to be sarcastic about yet-another-copy-of-a-throwie, but the switch is a useful addition, especially for this use.


    Reply 11 years ago on Introduction

    You're welcome. I gave you some stars as well.


    11 years ago on Introduction

    Cool, and easy. I got my brother into doing this, and we always try to find LED things for the images. :P Nice job. +5/5 stars.