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Photocells are used in control systems, where interrupting a beam of light opens a circuit, actuating a relay that supplies power to a mechanism to bring about a desired operation, such as opening a door or setting off a burglar alarm.
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encyclopedia2.thefreedictionary.com/photocell
encyclopedia2.thefreedictionary.com/photocell
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Although this photocell does not produce enough power to charge batteries or run circuits etc, it can be used for things such as a light sensor or as a pickup to hear a sound modulated light beam. Just imagine the thrill of hearing a ... Sometimes these homemade photocells actually work best on the black oxide areas.
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home.earthlink.net/~lenyr/photocell.htm
home.earthlink.net/~lenyr/photocell.htm
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Sometimes referred to as photoresistors or light-dependent resistors, CDS photocells are used to measure the intensity of light, and they're probably one of the easiest sensors you'll use for robotics applications.
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www.rentron.com/Micro-Bot/CDS.htm
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Sensors used in PECUs (Photocells).The most critical part of any PECU is the light sensor. Spectral sensitivity and long-term stability play an important role in providing reliable daylight detection. ... ; Table 2 : Comparison of sensors commonly used in PECUs (Photocells);
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www.zodionltd.eu.com/pecus_5.html
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Two sets of photocells are used to measure the walking speed and put an electonic marker on each of the five video tapes. This marker is a white horisontal bar on top of a video field (see video clips below)
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www.biomechanics.mai.ku.dk/gaitlab.htm
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photocell.net is an on-line showcase for modern photography ... Photographer-maintained showcase for contemporary photography. Part of the Netcells network. To view individual Cells click a name. ... 12 last image uploads:
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www.photocell.net/
www.photocell.net/
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It is pointed out that the use of a photographic photometer in investigating the propagation of light in water would eliminate some of the difficulties which occur when photomultipliers and photocells are used for this purpose. ... Accession Number : AD0673805 ... Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO...
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stinet.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=h...
stinet.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=AD0673805
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Photocells are used for photographers' exposure meters, burglar and fire alarms, automatic doors, and in solar energy arrays. ... This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
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encyclopedia.farlex.com/Photocells
encyclopedia.farlex.com/Photocells
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Sekonic has redesigned and re-launched the classic Studio Deluxe light meter as the L-398A Studio Deluxe III. ... The selenium photocells used in the L-398 had been discontinued because of manufacturing and environmental safety.
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www.studiolighting.net/seikonic-revives-studio-deluxe-i...
www.studiolighting.net/seikonic-revives-studio-deluxe-iii/
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