Tansister Switching

In this lab, we examine the properties of a Transistor as a circuit element. We particularly examine an NPN 2N3904 type of transistor due to how common of a part it is.

 

The Transistor essentially acts as a resistor due to its internal chemistry.

 

 

The Following Diagram shows the lab set up of our circuit.

 

 

A2 is a Green LED which we use as an indicator (Power) for the amount of current the transistor lets through.

This video shows my fingers replacing the R2 resister and acts as a switch:

 

 

 



 



After putting on a small light show, we no reintroduce that R2 where my fingers where and started collecting of current flowing through A1 and the Green LED. 

 

R1 = 39.5 Ohm R2 and R4 = 10kOhms  R2 = 39Oms P1 is a Linear Potentiometer