DIY GLOWING PENCIL LEAD

23,296

247

30

About: I am an electrical student living at chennai i love electronics very much.

Hai readers iam going to show how to make the pencil lead to glow like a light. During the process the lead can reach upto 300°¢ so be carefull while doing this.


Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: •°Components Required•°

* Pencil Lead
* Testube
* Meatel cap X 2
* Big Needle X 2
* ball point pen nib to hold lead at the edges
* 15 V DC supply

Step 2: °•Use 0.7 Lead•°

I used 0.7 pencli lead and 15V Dc power supply from li-ion battery

Step 3: °•Setting Up the Lead Inside the Tube°•

First take the Testube and break the bottom of the test tube. Now take metal cap and make hole in the centre of the cap. Now take the cloth stretching needle to make holder. To hold pencil lead you need to make holder. I used the ball point pen nib to hold the lead. Solder the ball point pen nib at the end of the needle by tieing it with thin copper wire. Now you can easily fix the lead inside the test tube

Step 4: •°POWERING UP°•

I powered this lead by using the 12v 7A li-ion battery the lead started glow by emiting the white coloured gas

Step 5: VIDEO

Make it Glow!

Participated in the
Make it Glow!

MAKE ENERGY: A US-Mexico Innovation Challenge

Participated in the
MAKE ENERGY: A US-Mexico Innovation Challenge

Be the First to Share

    Recommendations

    • Made with Math Contest

      Made with Math Contest
    • Cardboard Speed Challenge

      Cardboard Speed Challenge
    • Multi-Discipline Contest

      Multi-Discipline Contest

    30 Discussions

    0
    None
    spider_virus

    4 years ago

    Awesome project buddy. loved it broda

    0
    None
    hemarajme 1

    Reply 4 years ago

    up to 20 - 25

    0
    None
    me 1hemaraj

    Reply 4 years ago

    minutes or hours

    0
    None
    aylbegi

    4 years ago on Introduction

    Why would'n I just use a bulb?

    What is the advantage of using a pencil instead of bulb?

    Is it juist the AC problem?

    1 reply
    0
    None
    hemarajaylbegi

    Reply 4 years ago

    i wanna 2 do something new...soo i choosed pencil lead...ya

    0
    None
    ernestv

    4 years ago

    Won't this short circuit the battery and consequently cause it to over heat?

    4 replies
    0
    None
    nqtronixernestv

    Reply 4 years ago on Introduction

    Well, just because there is something condictive between both terminals of the battery it doesn't mean it's a short circuit. In this case the "short" is actually the load: compared to the resistance of the wires and the internal resistance the resistance of the pencil lead is much higher (at least 10 times).

    Nice instructable btw. :)

    0
    None
    hemarajernestv

    Reply 4 years ago

    No short circuit the electric bulb is also using the same princple

    0
    None
    settingsdestroyer

    4 years ago

    is there a chance the gas could be harmful or fairly to highly flammable? btw amazing project either way

    1 reply
    0
    None
    hemaraj

    4 years ago

    You can also use this in igination system

    0
    None
    fred3655

    4 years ago

    have you measured the current? how long before it burns out?