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ERIC Number: EJ1114124
Record Type: Journal
Publication Date: 2016-Nov
Pages: 8
Abstractor: As Provided
ISSN: ISSN-0031-9120
DIY Soundcard Based Temperature Logging System. Part I: Design
Nunn, John
Physics Education, v51 n6 Article 065002 Nov 2016
This paper aims to enable schools to make their own low-cost temperature logging instrument and to learn something about its calibration in the process. This paper describes how a thermistor can be integrated into a simple potential divider circuit which is powered with the sound output of a computer and monitored by the microphone input. The voltage across a fixed resistor is recorded and scaled to convert it into a temperature reading in the range 0-100 °C. The calibration process is described with reference to fixed points, and the effects of non-linearity are highlighted. An optimised calibration procedure is described which enables sub degree resolution and a software program was written which makes it possible to log, display, and save temperature changes over a user determined period of time.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: United Kingdom
Grant or Contract Numbers: N/A