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.

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
Awesome project buddy. loved it broda
<p>hey what do u meant from car battery ?</p>
<p>Really Genius :)</p>
how long does the lead last?
up to 20 - 25
minutes or hours<br>
<p>Why would'n I just use a bulb?</p><p>What is the advantage of using a pencil instead of bulb?</p><p>Is it juist the AC problem?</p>
i wanna 2 do something new...soo i choosed pencil lead...ya
Won't this short circuit the battery and consequently cause it to over heat?
<p>Naw, if that were the case i think he would be nursing some severe acid burns.</p>
<p>acid burns. at least i think that would be the case</p>
<p>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 &quot;short&quot; 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).</p><p>Nice instructable btw. :)</p>
No short circuit the electric bulb is also using the same princple
is there a chance the gas could be harmful or fairly to highly flammable? btw amazing project either way
no the gas does't make any harm
You can also use this in igination system
<p>Nice project! =)</p>
:) thank you
have you measured the current? how long before it burns out?
sorry forgot to measure <br>but when i give 15 voltage dc it starts glow
<p>Looks awesome!</p><p>you use graphite stick from a pencil, right?</p><p>Keep up the good work! :) </p>
yes i used 0.7 lead from pencip
<p>O.k, Thanks again! :)</p>
<p>Nice idea :)</p>
yes u r right
That's awesome
Thank You
How did you even think of this?!
My chemistry proffessor told about this

About This Instructable




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