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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.

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## Step 1: •°Components Required•°

* 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

Participated in the
Make it Glow!

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

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## 30 Discussions

Awesome project buddy. loved it broda

Why would'n I just use a bulb?

Is it juist the AC problem?

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?

4 replies

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. :)

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