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Helium–neon laser at the University of Chemnitz, Germany. A helium–neon laser or He-Ne laser is a type of gas laser whose high energetic medium gain medium consists of a mixture of ratio (between 5:1 and 20:1) of helium and neon at a total pressure of approximately 1 Torr (133 Pa) inside a small electrical discharge.
Trimmer potentiometers or "trimpots" A trimmer, or preset, is a miniature adjustable electrical component.It is meant to be set correctly when installed in some device, and never seen or adjusted by the device's user.
ISO 3166-1 alpha-3 – three-letter country codes which allow a better visual association between the codes and the country names than the alpha-2 codes. ISO 3166-1 numeric – three-digit country codes which are identical to those developed and maintained by the United Nations Statistics Division , with the advantage of script ( writing system ...
The Hewlett-Packard Company, commonly shortened to Hewlett-Packard (/ ˈ h juː l ɪ t ˈ p æ k ər d / HYEW-lit PAK-ərd) or HP, was an American multinational information technology company headquartered in Palo Alto, California.
An electronic component is any basic discrete electronic device or physical entity part of an electronic system used to affect electrons or their associated fields. Electronic components are mostly industrial products , available in a singular form and are not to be confused with electrical elements , which are conceptual abstractions ...
Three photoresistors with scale in mm Large CdS photocell from a street light. A photoresistor is less light-sensitive than a photodiode or a phototransistor.The latter two components are true semiconductor devices, while a photoresistor is a passive component that does not have a PN-junction.
Feedback-free instrumentation amplifier is the high-input-impedance differential amplifier designed without the external feedback network. This allows reduction in the number of amplifiers (one instead of three), reduced noise (no thermal noise is brought on by the feedback resistors) and increased bandwidth (no frequency compensation is needed).
The electron guns in color CRTs are driven by a video amplifier which takes a signal per color channel and amplifies it to 40–170 V per channel, to be fed into the electron gun's cathodes; [247] each electron gun has its own channel (one per color) and all channels may be driven by the same amplifier, which internally has three separate ...
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