2010 Physics Teachers’ Conference VCE Unit 3 Physics Further Electronics Detailed Study Jill Crawford – Methodist Ladies’ College

Using the ‘Power Supply Design’ materials prepared by the Swinburne University of Technology Electronics and Telecommunications staff to teach the Further Electronics Detailed Study in Unit 3 Physics.

Overview of Study Design: On completion of this unit the student should be able to design and investigate an AC to DC voltage regulated power supply system, and describe and explain the operation of the system and its components, and the effects of test equipment on the system.

Essential components of the Power Supply

The circuit board

Interrogating the supply Transformer: 18 V peak voltage, 50 Hz mains power

Rectification: Half-wave rectifier

Full-wave rectifier

Filtering Half Wave 470µF capacitor filter

Half Wave 2670 µF+ 470µF capacitor filter

Full Wave 470µF capacitor

Half wave, minimum load, zener-diode regulator

Half wave, maximum load, zener-diode regulator

Half wave, minimum load, IC regulator

Half wave, maximum load, IC regulator

Jill Crawford – Methodist Ladies’ College Power Supply Design Prepared by the Electronics and Telecommunications staff of the School of Biophysical Sciences and Electrical Engineering ©2004 This material was developed through a partnership between Swinburne University of Technology and the Physics Department at Methodist Ladies’ College, Kew. Secondary schools that have purchased the Swinburne Power Supply Kits have permission to use these written materials for educational purposes with their students.