Dc Power Suppy
MINISTRY OF SCIENCE AND TECHNOLOGY
DEPARTMENT OF TECHNOLOGY AND VOCATIONAL EDUCATION
TECHNOLOGICAL UNIVERSITY, MAWLAMYINE
DEPARTMENT OF ELECTRONIC ENGINEERING
PROJECT REPORT
ON
REGULATED DUAL VOLTAGE DC POWER SUPPLY
Supervisor: U Thein Min Wai
ABSTRACT
The regulated power supply converts the standard 220 volts, 50 or 60 Hz AC available at wall outlets into a constants DC voltage. It is one of the most common electronics circuits that we can find. The DC voltage produce by a power supply is used to power all the types of electronic circuits, such that television receiver, stereo system, CD players and laboratory equipment. The regulated dual voltage DC power supply is to be used for the FM receiver. Two regulators, one positive and the other negative, provide the positive voltage required for the receiver circuits and the dual polarity voltage for the op-amp circuits.
CHAPTER 1
INTRODUCTION
The regulated power supply is to provide the necessary dc voltage and current, with low levels of ac ripple and with stability and regulation. There are various methods of achieving a stable dc voltage from ac mains. The two methods are more commonly used. These are used; i) a linear voltage regulator and ii) A switching mode regulator. Several types of both linear and switching regulators are available in integrated circuit (IC) form. By using the linear voltage regulator method, we must get the regulated dual dc power supply.
[pic]Fig: (1) Block Diagram of the Regulated Dual Voltage DC Power Supply
CHAPTER 2
TRANSFORMERS
These are components which only work with alternating currents and are used to transform or change an alternating voltage up or down.
2.1 Working Principle of a Transformer A transformer is a device that (i) transfer electric power from one circuit to another (ii) it does so without a change of frequency iii) it accomplishes
DEPARTMENT OF TECHNOLOGY AND VOCATIONAL EDUCATION
TECHNOLOGICAL UNIVERSITY, MAWLAMYINE
DEPARTMENT OF ELECTRONIC ENGINEERING
PROJECT REPORT
ON
REGULATED DUAL VOLTAGE DC POWER SUPPLY
Supervisor: U Thein Min Wai
ABSTRACT
The regulated power supply converts the standard 220 volts, 50 or 60 Hz AC available at wall outlets into a constants DC voltage. It is one of the most common electronics circuits that we can find. The DC voltage produce by a power supply is used to power all the types of electronic circuits, such that television receiver, stereo system, CD players and laboratory equipment. The regulated dual voltage DC power supply is to be used for the FM receiver. Two regulators, one positive and the other negative, provide the positive voltage required for the receiver circuits and the dual polarity voltage for the op-amp circuits.
CHAPTER 1
INTRODUCTION
The regulated power supply is to provide the necessary dc voltage and current, with low levels of ac ripple and with stability and regulation. There are various methods of achieving a stable dc voltage from ac mains. The two methods are more commonly used. These are used; i) a linear voltage regulator and ii) A switching mode regulator. Several types of both linear and switching regulators are available in integrated circuit (IC) form. By using the linear voltage regulator method, we must get the regulated dual dc power supply.
[pic]Fig: (1) Block Diagram of the Regulated Dual Voltage DC Power Supply
CHAPTER 2
TRANSFORMERS
These are components which only work with alternating currents and are used to transform or change an alternating voltage up or down.
2.1 Working Principle of a Transformer A transformer is a device that (i) transfer electric power from one circuit to another (ii) it does so without a change of frequency iii) it accomplishes
References: (1) Floyd, Thomas L. "Electronic Devices" Fourth Editions, Prentice Hall, Inc, 1996 (2) Wason Kamal "Electronics Projects" Second Edition, EFY Enterprises Pvt Ltd, 1999