phototube relay

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• Electronic component — Various components An electronic component is a basic electronic element and may be available in a discrete form having two or more electrical terminals (or leads). These are intended to be connected together, usually by soldering to a printed… …   Wikipedia

• Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …   Wikipedia

• photoelectric cell — Electronics. photocell. [1890 95] * * * ▪ electronics also called  Electric Eye, Photocell, or Phototube,         an electron tube with a photosensitive cathode that emits electrons when illuminated and an anode for collecting the emitted… …   Universalium

• photoglow tube — noun A phototube in which an electric current flows when a certain illumination is reached; used as a relay …   Wiktionary