Kathmandu universityDepartment of electrical and electronics engineering

Presented by :

Divya mishra

Manish Karn

Sujeet Kumar Jha

Ahmed Raja Khan

Rupa Rokaya

DC Voltage SupplierPresented to :

DOEEE

INTRODUCTIONBackground and features

• The DC Voltage supplier is an electrical device which supply DC output.

• It is capable of supplying constant as well as variable dual voltages and currents to the user.

• It is small, simple, cheap and efficient device that is performing efficient functions

• it has the visual indication for voltage and current supplied

OBJECTIVES

• Our objectives is to design the electronic circuit and apply it in way that it meets the following technical specification

• Input voltage :- 220 v Main AC

• Output Voltage :- 0 – 10(approx) adjustable

• 0- (-10), 5v fixed

• Output current :- 10mA – 3A, 1A fixed

• Complete protection of the device against the loads and malfunction

COMPONENTS

• Transformer

• Diodes

• Capacitors

• Regulators

• ICL7107cplz

• Seven segment display

Working Mechanism

• AC- AC converter

• AC- DC converter

• DC – DC converter

• DC measured by ICL7107 and displayed digitally

• Same circuit is converted to current measuring and displaying

BLOCK DIAGRAM

BLOCK DIAGRAM(continued)

Block diagram for digital voltmeter

Brief description about ICL7107

• It displays the measurement of dc output voltages from the supply as discrete numerals through the seven segment displays. The display section uses CMOS IC ICL7107CPLZ which is typical a/d converter measure the voltages based on the dual slope technique. It is complete integrated package of , Integrator , Level comparator , A basic clock , Counters , Display Driver

APPLICATIONS

• Laboratory

• Electrical and electronics Projects

• Home appliance

• Commercial Use

ACKNOWLEDGEMENT

• We would like to thank Department of Electrical andElectronics to provide us the opportunity to work on thisproject which will help us to explore our creativity andknowledge. We would also like to thank our projectsupervisor Mr. Parash Acharya for his guidance and timeto guide us throughout the project.