glossary:glossary_i
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glossary:glossary_i [2014/11/11 13:29] – external edit 127.0.0.1 | glossary:glossary_i [2022/01/26 09:24] – [Incandescent lamps] WortingUK | ||
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===== ICs ===== | ===== ICs ===== | ||
+ | An integrated circuit (IC) is an electronic component which typically packages a collection of transistors, | ||
- | Integrated Circuits are usually called ICs or chips. They are complex circuits which have been etched onto tiny chips of semiconductor (silicon). The chip is packaged in a plastic holder with pins spaced on a 0.1" | ||
- | {{: | ||
- | [[http:// | ||
+ | ===== ICSP (In Circuit Serial Programming) ===== | ||
+ | ICSP is a means whereby embedded microprocessors are ' | ||
+ | There are no standard physical designs/ | ||
+ | Generally MERG modules, with PIC microprocessors, | ||
+ | [[: | ||
+ | Arduino modules use a USB connection.\\ | ||
+ | AVR ATMEGA chips use a 6 pin connector based on SPI bus. (Optional on Arduino AVR modules)\\ | ||
+ | Atmel SAMD chips have a OneWire ICSP (signal/ | ||
===== Incandescent lamps ===== | ===== Incandescent lamps ===== | ||
- | Lamps emit light when an electric current passes through | + | Incandescent lamps emit light when an electric current passes through a thin wire filament, which becomes very hot and glow brightly. Filament lamps may have a shorter lifetime than most electronic components because the filament |
- | Filament lamps have a shorter lifetime than most electronic components because | + | |
- | \\ {{: | + | \\ {{: |
+ | |||
+ | {{: | ||
\\ [[http:// | \\ [[http:// | ||
+ | ===== Include Guard ===== | ||
+ | A method of preventing a C or C++ header file, from being included more than once by the main file. | ||
+ | |||
+ | ''# | ||
+ | |||
+ | #define _FILENAME_H | ||
+ | |||
+ | // .... contents of the header file | ||
+ | |||
+ | #endif /* _FILENAME_H */'' | ||
+ | |||
+ | If the compiler supports it then '' | ||
===== Inductor ===== | ===== Inductor ===== | ||
- | An inductor is a coil of wire which may have a core of air, iron or ferrite (a brittle material made from(iron). Its electrical property is called inductance and the unit for this is the henry, symbol H. 1H is very large so mH and uH are used, 1000uH and 1000mH=1H. Iron and ferrite cores increase the induction. \\ | + | An inductor is a coil of wire which may have a core of air, iron or ferrite (a brittle material made from iron). Its electrical property is called inductance and the unit for this is the Henry, symbol H. 1H is very large so mH and uH are used, 1000uH=1mH and 1000mH=1H. Iron and ferrite cores increase the inductance. \\ |
- | Inductors are mainly used to tune circuits and to block high frequency AC signals (they re sometimes called chokes) \\ | + | Inductors are mainly used to tune circuits and to block high-frequency AC signals (they're sometimes called chokes) \\ |
- | They pass DC easily, but block AC signals | + | They pass DC easily, but block AC signals; this is the opposite |
\\ {{: | \\ {{: | ||
\\ [[http:// | \\ [[http:// | ||
- | ===== Infra red emitter ===== | + | ===== Infrared |
- | These IR emitters are high intensity Gallium Arsenide infrared emitting diodes | + | These are light emitting diodes (LEDs) which emit light outside of the visible light spectrum. |
+ | IR emitters are generally | ||
\\ {{: | \\ {{: | ||
- | ===== Infra red receiver/ | + | ===== Infrared |
- | Two types of IR receivers are used, a phototransistor or a photodiode | + | There are two common |
\\ {{: | \\ {{: | ||
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- | Name for means of linking the operation of points and signals such that signals can only show a proceed aspect when points are correctly set, and that points cannot be moved unless the signals over them are showing stop aspects. Interlocking can be mechanical, electrical using relays or carried out by computers. | + | Name for a means of linking the operation of points and signals such that signals can only show a proceed aspect when points are correctly set, and that points cannot be moved unless the signals over them are showing stop aspects. Interlocking can be mechanical, electrical using relays or carried out by computers. |
+ | =====ISR===== | ||
+ | An Interrupt Service Routine is a firmware/ |
glossary/glossary_i.txt · Last modified: 2023/07/25 15:55 by JohnFletcher