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ERIC Number: EJ1054299
Record Type: Journal
Publication Date: 2012
Pages: 8
Abstractor: As Provided
ISSN: EISSN-2065-1430
High Resolution Sound Card Stopwatch Extends School Experimentation
Kopasz, Katalin; Makra, Péter; Gingl, Zoltán
Acta Didactica Napocensia, v5 n2 p59-66 2012
The development of demonstration experiments plays a key role in modern and efficient teaching of physics, chemistry, biology and several other disciplines. Today's computers and electronic devices allow the use of simple software-based instrumentation to achieve flexible and surprisingly transparent experimentation, however, the professional solutions are rather expensive while the "home-made" instruments are often inaccurate and the software can be inconvenient and didactically questionable. There are several attempts to solve these problems and make experiments accessible for almost every teacher and student. In this paper a very simple, ultra low cost, easy-to-make sound card based high-resolution stopwatch will be shown that supports a wide variety of mechanical experiments. Here we present two kinds of experiments, with which we can demonstrate well the usefulness of our device: measurement of the moment of inertia, and study of free-falling balls. We also show how these kinds of measurement methods develops different competences of the students.
Babes-Bolyai University. Kogainiceanu 1, Cluj-Napoca, 400084 Romania. e-mail:; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: Secondary Education; High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A