An innovative way using pencil lead ( graphite)
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.