High resolution stopwatch for cents
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Publication
- Z. Gingl, K. Kopasz, High resolution stopwatch for cents, accepted for publication in Physics Education
e-print:arxiv
Open-source software
No support is provided.
Visual C++ source code
Windows executable
Connecting the sensors to the microphone input
The microphone input of the sound card should be used. Heat shrink tubes are used to isolate the wires from directly touching them.
Farnell ordering pages: 3,5mm jack plug, TEPT4400, OFT-5301 (lowest cost infrared phototransistor)
Example experiment
Related information
- Ganci A and Ganci S 2009 Stopwatch provides low-cost training Phys. Educ. 44 119-20
- Gingl Z 2011 Sub-$10 photogate variants Phys Teach. submitted, Arxiv preprint arXiv:1101.0608
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