Bipolar junction transistor vid 2 NPN amplifier demo circuit w cutoff active region saturation gain HD

My websites new page, devoted to supporting this video series http://www.electronzap.com/bipolar-junction-transistors-npn-and-pnp-bjts/ Transistors can be purchased from amazon by clicking http://amzn.to/2iNjLMg which will support my channel. Thanks! I demonstrate the basic amplification properties of the NPN Bipolar Junction Transistor BJT by using a couple LEDs, one as a load with a resistor and the other to show current flow to the base. The base current is controlled by a trimpot voltage divider.