A Long-Range Sunlight-Resistant Photogate

Autor/inn/en	McCaughey, Michael Paul; Henderson, Madison
Titel	A Long-Range Sunlight-Resistant Photogate
Quelle	In: Physics Teacher, 59 (2021) 5, S.367-368 (2 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0031-921X
Schlagwörter	Physics; Laboratory Experiments; Light; Science Equipment; Science Experiments; Time + Suchen Sie Ihr Suchwort? Physik; Laboratory work; Laborarbeit; Licht; Zeit
Abstract	Photogates play an important part of many of today's physics laboratory experiments. They signal when an infrared (IR) beam is interrupted, thus supplying the experimenter with important timing information. Currently photogates use an infrared photodiode (IR transmitter) and a phototransistor (IR receiver). User-built photogates have a weakness though. When a photogate-based experiment is run in a sunlit room, stray sunlight, under certain conditions, can temporarily saturate the phototransistor, causing it to fail unexpectedly. In this article we present an inexpensive IR receiver module that replaces the phototransistor. It is sunlight resistant, comparable in size to a phototransistor, and requires only minor modification to housing, wiring, and programming of the existing user-built systems. This module can also be used in a system designed to communicate data from an ongoing experiment over a long range. The module is commonly used in a handheld TV remote. (As Provided).
Anmerkungen	American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://aapt.scitation.org/journal/pte
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01