Computer-assisted experiments with oscillatory circuits

A basic setup for data acquisition and analysis from an oscillatory circuit is described, with focus on its application as either low-pass, high-pass, band-pass or band-reject frequency filter. A homemade board containing the "RLC" elements allows for the interchange of some of them, in pa...

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Bibliographic Details
Published in:European journal of physics 2010-03, Vol.31 (2), p.299-306, Article 299
Main Authors: Fernandes, J C, Ferraz, A, Rogalski, M S
Format: Article
Language:English
Subjects:
Circuits
College Science
Communication, education, history, and philosophy
Computer Uses in Education
Damping
Data Analysis
Data processing
Education
Educational Technology
Equations (Mathematics)
Exact sciences and technology
Frequency ranges
General physics
Laboratory Equipment
Laboratory materials
Mathematical analysis
Physics
Physics literature and publications
Science Experiments
Science Instruction
Science Laboratories
Students
Surveys and tutorial papers, resource letters
Teaching Methods
Undergraduate Study
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Summary:A basic setup for data acquisition and analysis from an oscillatory circuit is described, with focus on its application as either low-pass, high-pass, band-pass or band-reject frequency filter. A homemade board containing the "RLC" elements allows for the interchange of some of them, in particular, for the easy change of the "R" value, and this makes apparent for the student its influence on the damping factor. The function generator operates in the swap frequency mode over a suitable frequency range and all the circuit parameters are chosen to provide a reasonable set of data for all the electronic filters studied. The output data are acquired through a commercially available DAQ board and data analysis is performed using a graphing and fitting workspace. The main objective is to develop a methodology of teaching the laboratory material through a computer-based environment devised to help students to appreciate how the governing equations work and to visualize their practical applications. (Contains 5 figures.)
ISSN:0143-0807
1361-6404
DOI:10.1088/0143-0807/31/2/007