glossary:glossary_b
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glossary:glossary_b [2020/09/14 14:39] – [BC3] grovenor | glossary:glossary_b [2022/10/10 21:55] (current) – [Booster] add bootloader Bob Vetterlein | ||
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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 changed or 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. Literature about it is available from MERG - TBs T33/0-20.\\ | + | 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 about it is available from MERG - Technical Bulletins |
- | although kits have been discontinued. | + | [[: |
- | [[: | + | |
===== Bell signals ===== | ===== Bell signals ===== | ||
- | 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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A Booster in DCC is a second power supply to increase the power available from the main master power supply. This may also have the facility for voltage inversion to allow for reverse loops etc but this is more cheaply handled by a specific reversing module. It can also help to reduce potential damage and problems by being used to divide the whole layout into separate sections each supplied by a booster so that shorts in one section do not affect another and the potential current is reduced to that available from one booster. | A Booster in DCC is a second power supply to increase the power available from the main master power supply. This may also have the facility for voltage inversion to allow for reverse loops etc but this is more cheaply handled by a specific reversing module. It can also help to reduce potential damage and problems by being used to divide the whole layout into separate sections each supplied by a booster so that shorts in one section do not affect another and the potential current is reduced to that available from one booster. | ||
+ | ===== BootLoader ===== | ||
+ | |||
+ | The majority of [[glossary: | ||
===== Bps ===== | ===== Bps ===== | ||
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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