# Paper Circuit

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## Introduction: Paper Circuit

An innovative way using pencil lead ( graphite)

### Teacher Notes

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## Step 1: Gather All Materials

all we need is

1) A pencil ( HB works the best )
2) A full size paper
3) Some led,s or other low current appliance
4) A power source

## Step 2: Basic Circuit

Draw a rough circuit using the pencil with the appliance and connect the power source with wires

## Step 3: The Calculations

Measure the length of the pencil circuit and find out the required voltage and amperage. Taking resistivity of graphite as 30x10^-5 ohm m, choose an appropriate power hub.
( I used a 9 volt battery for a 2m circuit with 5 led,s )

## Step 4: The Final Step

Connect the terminals to the appliance(s) and turn on the power. It works !!

## Step 5: Basic Idea Behind It and It's Uses

As we all know that pencil lead acts as a semiconductor so what we can do is we can draw any kind of a circuit using a dark pencil . This technique with advancements can replace wires and resistor in electronic gadgets in future.

Participated in the

Participated in the
Full Spectrum Laser Contest 2016

Participated in the
Hand Tools Only Contest 2016

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