How to make a transistor using homemade article(copper sulfate).

[Avidestroyer]

How to make homemade transistor?

 

[nitishn5]

A transistor consists of a semiconductor of very high purity. Which has to be doped in different regions separately to get the different regions.
I don't think it would be possible to do this at home.

 

[BradtheRad]

Many have done homebrew experiments. An internet search will turn up a few.

Youtube has some videos.

Such as these, by a remarkable lady electronics expert named Jeri Ellsworth.

Make a Point Contact Transistor at home
(by breaking open a germanium diode and forming a collector on the surface)

https://www.youtube.com/watch?v=vmotkjMSKnI

Homemade Transistor Demonstration

https://www.youtube.com/watch?v=-Qph8BNrnLY

 

[Avidestroyer]

Can I make logic gate using only relay?

 

[godfreyl]

This site shows how to make home-made FET transistors, CRTs, lasers and other cool stuff.