06-02-2016, 11:53 AM
transistor as a switch full project file of class xll in pdf
Solid state materials can be grouped in to 3 classes :- Insulators, Conductors and Semiconductors. Semiconductor material is neither conductor nor insulator. It has conductivity between conductors and insulators and is sensitive to temperature, illumination, magnetic field and minute amount of impurity atoms. This type of sensitive material for controlling or switching current is very much required in modern age. Today electronics device means present of semiconductor devices.
Semiconductor Devices are the foundation of electronics industry. For Learning electronics it is necessary to have basic knowledge of Semiconductor device. A common semiconductor device is a Transistor.Aim of this project is to determine characteristic of a NPN transistor by varying base voltage and detect Cut-off Region and Saturation Region.We have used a potentio-meter for varying Base voltage. After assembling the circuit use a digital multi-meter and scale mark the voltage. You can also attach a multi-meter permanently.
A low power indicator such as LED is used for detection of conductance of transistor. LED is connected to power supply through collector of transistor so that when transistor is conducted then circuit will be complete and led glows.After making the project. Place the battery and start rotating knob of POT. You will see LED begins glowing reaching 0.5V and at 0.7V it will be at full bright. Thus you can mark cut off region (fully off) and Saturation Voltage (full dark). Most of the transistor will conduct from .5 to .7 Volt.This type of circuit is commonly used in voltage stabilizer for high voltage cut off. A relay is placed at LED connection.
Transistor is a semiconductor device used for switching and amplification of weak signals. This article explains how a transistor work and the working of transistor as a switch. At present, transistors are applied in most of the electronic equipments for switching purposes. Digital ICs, Microcontrollers, etc uses thousands of embedded transistor for switching. The huge electrical networks are also switched by simple transistor switching circuit(Most of the Power electronics circuits). Here we are discussing about npn transistor switching circuit. To realize the exact working principle, an LED (Light Emitting Diode) is connected to the collector of npn transistor. It glows according to the base current. Don’t forget to connect the base resistor (Rb) to limit the base current other wise the transistor become damage. Transistor switching circuits are also employed in DC Motor driver circuit
Solid state materials can be grouped in to 3 classes :- Insulators, Conductors and Semiconductors. Semiconductor material is neither conductor nor insulator. It has conductivity between conductors and insulators and is sensitive to temperature, illumination, magnetic field and minute amount of impurity atoms. This type of sensitive material for controlling or switching current is very much required in modern age. Today electronics device means present of semiconductor devices.
Semiconductor Devices are the foundation of electronics industry. For Learning electronics it is necessary to have basic knowledge of Semiconductor device. A common semiconductor device is a Transistor.Aim of this project is to determine characteristic of a NPN transistor by varying base voltage and detect Cut-off Region and Saturation Region.We have used a potentio-meter for varying Base voltage. After assembling the circuit use a digital multi-meter and scale mark the voltage. You can also attach a multi-meter permanently.
A low power indicator such as LED is used for detection of conductance of transistor. LED is connected to power supply through collector of transistor so that when transistor is conducted then circuit will be complete and led glows.After making the project. Place the battery and start rotating knob of POT. You will see LED begins glowing reaching 0.5V and at 0.7V it will be at full bright. Thus you can mark cut off region (fully off) and Saturation Voltage (full dark). Most of the transistor will conduct from .5 to .7 Volt.This type of circuit is commonly used in voltage stabilizer for high voltage cut off. A relay is placed at LED connection.
Transistor is a semiconductor device used for switching and amplification of weak signals. This article explains how a transistor work and the working of transistor as a switch. At present, transistors are applied in most of the electronic equipments for switching purposes. Digital ICs, Microcontrollers, etc uses thousands of embedded transistor for switching. The huge electrical networks are also switched by simple transistor switching circuit(Most of the Power electronics circuits). Here we are discussing about npn transistor switching circuit. To realize the exact working principle, an LED (Light Emitting Diode) is connected to the collector of npn transistor. It glows according to the base current. Don’t forget to connect the base resistor (Rb) to limit the base current other wise the transistor become damage. Transistor switching circuits are also employed in DC Motor driver circuit
