glossary:glossary_b
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glossary:glossary_b [2019/10/20 12:35] – [Back EMF] tom_shenton | glossary:glossary_b [2021/08/08 04:05] – updated the wikipedia links Wayne | ||
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- | Back EMF generally refers to the voltage generated by the rotation of a motor but also to the voltage that will appear across an inductor if the current is stopped suddenly.\\ | + | Back Electromotive Force ([[wp> |
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- | The BC3 is an automatic block control system otherwise known as SuperBloc (QV). It controls the speed of a model train depending on the occupation of the block ahead. If the block ahead is occupied the train will slow to a creep speed and stop at a designated point. Otherwise the train will accelerate to a preset speed. Manual control is also allowed for. Kits for the [[: | + | The BC3 is an automatic block control system otherwise known as SuperBloc (QV). It is a development of and compatible with BloNg (Block oriented N gauge). It controls the speed of a model train depending on the occupation of the block ahead. If the block ahead is occupied the train will slow to a creep speed and stop at a designated point. Otherwise the train will accelerate to a preset speed. Manual control is also allowed for.\\ Literature |
- | The BC3 kit is No38 Nos 39 and 40 are a test jig and a setting up kit. Kit instructions for 38 and 39 are available from MERG.\\ | + | |
- | [[https:// | + | |
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- | Bell Signals are used as part of a block signaling | + | Bell Signals are used as part of a block signalling |
The cadence of the Bell Signals were used to convey information. An example would be two bell rings would mean a train is entering a section and two rings followed by one ring may mean the train is clearing a section. | The cadence of the Bell Signals were used to convey information. An example would be two bell rings would mean a train is entering a section and two rings followed by one ring may mean the train is clearing a section. | ||
- | Though there are some universal | + | Though there are some commonly used bell signals, different |
\\ | \\ | ||
[[https:// | [[https:// | ||
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===== BGA ===== | ===== BGA ===== | ||
Ball Grid Array; a method of permitting a large number of connections in a smaller footprint for large scale Integrated Circuits. | Ball Grid Array; a method of permitting a large number of connections in a smaller footprint for large scale Integrated Circuits. | ||
- | See https:// | + | See [[wp>Ball_grid_array|BGA]] |
===== Bipolar ===== | ===== Bipolar ===== | ||
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- | Block control is the philosophy that a railway should be divided into blocks and that no train should normally be allowed to enter a block which is already occupied. This means that each block has a stop signal at which a train is required to wait if the block ahead is occupied. This will be set back 0.25 mile from the start of the next block. Further back there will be a distant signal which informs the driver that he needs to slow because the signal ahead is at stop.\\ | + | Block control is the philosophy that a railway should be divided into blocks and that no train should normally be allowed to enter a block which is already occupied. This means that each block has a stop signal at which a train is required to wait if the block ahead is occupied. Further back there will be a distant signal which informs the driver that he needs to slow because the signal ahead is at stop.\\ |
Modern electric signalling systems allow for more variation in slow signals with the a double yellow as a preliminary caution as well as the yellow caution to give two stages of slowing.\\ | Modern electric signalling systems allow for more variation in slow signals with the a double yellow as a preliminary caution as well as the yellow caution to give two stages of slowing.\\ | ||
[[http:// | [[http:// | ||
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- | Block Occupancy | + | Block Occupancy |
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- | The Block Oriented | + | The Block oriented |
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- | [[https:// | + | |
- | [[http:// | + | |
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- | * Unordered List ItemBuffers | + | * Buffers |
- | * Unordered List ItemCache | + | * Cache is typically frequently requested disk I/O. If multiple processes are accessing the same files, much of those files will be cached to improve performance (RAM being so much faster than hard drives), it's disk cache. |
In Hardware a buffer is a digital or analog stage used to isolate a signal source from the following circuit' | In Hardware a buffer is a digital or analog stage used to isolate a signal source from the following circuit' | ||
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- | * Buses are used for connecting components of a computer: a common example is the PCI bus in PCs. See [[https:// | + | * Buses are used for connecting components of a computer: a common example is the PCI bus in PCs. See [[wp>Bus_(computing)|computer bus.]] |
- | * Buses are used for communicating between computers (often microprocessors). See [[https:// | + | * Buses are used for communicating between computers (often microprocessors). See [[wp>Bus_(computing)|computer bus.]] |
- | * Buses are used for distribution of electrical power to components of a system. The (usually) thick conductors used are called busbars. In an electrical laboratory, for example, a bare bus-bar will sometimes line the wall, to be used by the engineers and technicians for its high electrical current carrying capacity, which allows a convenient approximation to zero voltage, or ground in the US, and earth in the UK. See [[https:// | + | * Buses are used for distribution of electrical power to components of a system. The (usually) thick conductors used are called busbars. In an electrical laboratory, for example, a bare bus-bar will sometimes line the wall, to be used by the engineers and technicians for its high electrical current carrying capacity, which allows a convenient approximation to zero voltage, or ground in the US, and earth in the UK. See [[wp>Busbar|BUSBAR]]\\ |
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- | In analysis of an electric power network a " | + | |
=====Byte===== | =====Byte===== | ||
The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number. Historically, | The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number. Historically, | ||
glossary/glossary_b.txt · Last modified: 2022/10/10 21:55 by Bob Vetterlein