glossary:glossary_o
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glossary:glossary_o [2013/04/11 12:29] – [Ohms] WortingUK | glossary:glossary_o [2021/08/08 05:20] (current) – Moved the entry to OP to make it alphabetical Wayne | ||
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- | Circuit diagram of Darlington configuration | + | Circuit diagram of Darlington configuration \\ {{: |
+ | For new designs the {{ : | ||
+ | {{: | ||
===== Ohms ===== | ===== Ohms ===== | ||
Definition: >An ohm (SI symbol Ω but commonly is R) is a resistance that produces a potential difference of one Volt when a current of one Ampere is flowing through it. 10 Ω resistor can be represented as 10R. Ohms law formula: voltage (V) = amps (I) x resistance (R) or V=I.R or I=V/R or R=V/I | Definition: >An ohm (SI symbol Ω but commonly is R) is a resistance that produces a potential difference of one Volt when a current of one Ampere is flowing through it. 10 Ω resistor can be represented as 10R. Ohms law formula: voltage (V) = amps (I) x resistance (R) or V=I.R or I=V/R or R=V/I | ||
+ | |||
+ | ===== OP ===== | ||
+ | |||
+ | Context sensitive: | ||
+ | OP - Original Poster - The person starting a topic, thread or discussion.\\ | ||
+ | OP - Original Post - The first post in a topic, thread or discussion.\\ | ||
+ | OP - Original Post - The first post made by a particular person in a topic, thread or discussion.\\ | ||
===== Op amp ===== | ===== Op amp ===== | ||
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- | Open-collector configuration In an integrated circuit, an output scheme utilizing no internal pull-up resistor. Wired-OR outputs can thus have opposite states without risk of damage to the device. | + | Open-collector configuration In an integrated circuit, an output scheme utilizing no internal pull-up resistor. Wired-OR outputs can thus have opposite states without risk of damage to the device.\\ |
+ | An example of this type of device can be seen above under [[glossary_o# | ||
===== OpenLCB ===== | ===== OpenLCB ===== | ||
+ | {{ : | ||
- | Refers to the Open Layout Control Bus, a publicly developed MRR accessory [[glossary_b# | + | Refers to the [[https:// |
===== Optical detector ===== | ===== Optical detector ===== | ||
- | Optical detector: Anintegrated-circuit | + | These comprise of a light source, a light sensor and a comparator. The light could be visible, UV (rare) or IR (common). The light source can be ambient light (rare), a light bulb or a light emitting diode (common). The light sensor converts |
===== Opto-isolator ===== | ===== Opto-isolator ===== | ||
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A light-emitting diode (LED) or infrared-emitting diode (IRED) and a photodiode combined in a single package with a transparent gap between them. The LED or IRED converts an electrical signal to visible light or IR; the photodiode changes the visible light or IR back into an electrical signal. This device eliminates interstage impedance reflections that can plague systems that employ electronic coupling. Even the most drastic changes in load impedance have no effect on the impedance “seen” by the signal source. The devices can also protect expensive equipment against electrical transients; for example, in telephone-line modems used with personal computers. | A light-emitting diode (LED) or infrared-emitting diode (IRED) and a photodiode combined in a single package with a transparent gap between them. The LED or IRED converts an electrical signal to visible light or IR; the photodiode changes the visible light or IR back into an electrical signal. This device eliminates interstage impedance reflections that can plague systems that employ electronic coupling. Even the most drastic changes in load impedance have no effect on the impedance “seen” by the signal source. The devices can also protect expensive equipment against electrical transients; for example, in telephone-line modems used with personal computers. | ||
+ | |||
+ | ===== OR ===== | ||
+ | OR [[logicgates# | ||
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- | An instrument | + | An instrument |
glossary/glossary_o.1365683359.txt.gz · Last modified: 2014/11/11 13:27 (external edit)