Electronics: How To Use 2N3055 Transistor - Light Bulb Dimmer / Motor Speed Control

Electronics: This video shows how to use a 2n3055 transistor to make a light bulb dimmer or motor speed control electric circuit. It shows basic operation of a Transistor and how to use one to control electric current. Schematic is included in the video This circuit is highly inefficient as the transistor gets extremely hot. PWM is the best way to achieve this, however this is more complex. This circuit is a good way for a beginner to understand transistor current control. Circuit uses a 12V 7 Ah battery 100 ohm 0.6w resistor 10K linear potentiometer (Variable resistor) 2n3055 NPN Transistor 12v 20W car indicator bulb The Electronic components can be purchased in the UK from Maplin Electronics