Introduction: How to Make Paper Transistor

List of material need

1. Paper (any book are note paper )  
2. Pencil  (any one )
3. LED  (20 mA  small LED)
4. Wire single strand
5. Sticking tape
6. Battery (6 volt 4.5ah or 12 volt 7ah for best result )


Step 1: Step 2

Step; 2
By using an pencil draw a transistor shape on paper you have (note: make it as small as possible and mean time big enough to wire to be pleased on it )


Step 2: Step

Picture of Step

draw a outer line using pencil

Step 3: Step 3

Step 3
By using your pencil try to fill the space with multiple layer of pencil cote many as you can until you get reflection on paper (note : use blunt tip other vise paper may damage )

Step 4:

Picture of

Step 4
Above image shows that (E, B, C) emitter base collector by using the sticking tape please a negative terminal from a battery to an emitter terminal of  paper transistor at bottom side

Step 5:

Picture of

Step 5
Taka a LED and please a cathode at collector terminal stick with tape (make sure it properly touching the paper) and anode terminal of an LED to an positive end of a battery (NOTE: by this time LED will glow other vise check the connection

Step 6:

Step 6
And using a single strand wire make another positive terminal extension and please on the base terminal of an paper transistor (note : do not stick it )
By this base supply the LED will turn off (NOTE: because  the negative supply traveling trough the emitter to collector terminal is intercepted so at the base terminal the positive potential is equal or greater than the negative potential  (  + =>  -   )   so the LED turns off  )


njmalhq (author)2016-12-24

You are right ... it is a "sistor" ... but with a "re" not a "tran."

PrashantG2 (author)2016-03-03

haha lol what you think you can fool us.... you make a graphite circuit and make short circiut to show the led shops.. nice bro lmao

JeremiahT1 (author)2015-06-21

sir, what you did is a simple carbon type resistor resistor

alwyn_belho (author)2015-05-17

Is that a pnp transistor or a npn transistor.If no answer then its not a transistor ha ha ha.

mapmaker909. (author)2014-10-15

That is cool.

tgferreira184 (author)2014-01-19

After looking at step 5's image and analysing the wiring I discovered that it is not a transistor. A transistor would light the LED up when you touch the wire in it's base, not turn it off. Basicly what you do is to create a short between the + and the - when you touch the wire, bypassing the LED (electricity takes the least resistance path, in this case the wire, and when the wire is not connected the LED) and turning it off.

you're right that it's not a transistor, but what you're talking about (A transistor would light the LED up when you touch the wire in it's base) is what would happen if it was a npn transistor, there are other transistors that do the same thing as this paper, it just works in a different way.

karthick robo (author)2013-08-15

It transfer resistens so its transistor

That's not how a transistor works, a transistor (assuming the commong bipolar transistor) operates as a semiconductor with at least one each of p and n-type semiconducting material. This doesn't transfer resistance or change the resistance of the third terminal, it simply draws power through the shortest available route, far from what a transistor does.

agetu (author)2013-08-18

nope it is not an transistor

WacoRadioWeirdo (author)2013-08-15

sorry but its not a transistor .....

artworker (author)2013-08-13

nice idea to play around with!

Inthedoghouse (author)2013-08-13

Still pretty neat.

rickharris (author)2013-08-13

Ah. Actually no this isn't a transistor. The graphite in the pencil lead conducts electricity.

A transistor would require a PNP or an NPN junction to operate.

What is happening here is that the positive connection to the "base" short circuits the LED so all the current is flowing through the wires rather then the LED.

icsnerdics (author)rickharris2013-08-13

exactly, this is not a transistor at all.

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