2N3108

2N3108 is a discreet NPN transistor used in lots of electronic devices. It is a type of bipolar junction transistor (BJT) that is built to function under a single polarity. The structure of the 2N3108 is made up of three bases, the emitter, base, and collector. It is mainly used in various kinds of applications that rely on its switching abilities, such as amplifiers and oscillators.

The working principle of 2N3108 is surprisingly simple. When voltage is applied to the base and emitter, electrons are generated and pushed into the base layer. This causes the current to flow from the base to the collector, effectively switching it on and allowing current to pass through. On the other hand, when the base is not supplied with voltage, no current will travel through the collector, effectively switching it off.

The ability of 2N3108 to act as a switch is one of its main applications. It can be used in amplifiers, oscillators, and other circuits to turn them on and off. The 2N3108 is also used in drives for motors, for controlling the current that is sent and allowing the motor to be switched on and off at specific times. It is also commonly used in temperature sensors, acting as the switch between the power source and the sensor.

Furthermore, 2N3108 can be used in optocouplers. Optocouplers are devices used to protect sensitive electronics from dangerous voltage spikes that may occur. The optocoupler is made up of two components: the photodiode, which is connected to the power source, and the 2N3108, which is connected to the sensitive device. When the current is applied to the photodiode, it generates a voltage that is sent to the 2N3108, allowing it to switch on the sensitive device without passing the dangerous voltage to it.

2N3108 is an incredibly versatile transistor with a variety of applications. Its ability to switch voltage and current on and off makes it a great choice for amplifiers, oscillators, and motor drives. Furthermore, its use in optocouplers and temperature sensors adds to its versatility. All in all, the 2N3108 is an invaluable component that is used in countless electronic devices.