glossary:glossary_p
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glossary:glossary_p [2015/01/09 02:01] – [PCB - Printed Circuit Board] Changed the title to PCB to be consistent with other Acronym entries in the Glossary Wayne | glossary:glossary_p [2021/08/08 01:09] – [Pulse Width Modulation] Wayne | ||
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- Pertaining to the shunt connection of components or circuits. | - Pertaining to the shunt connection of components or circuits. | ||
- | - Pertaining to the type of operation in a computer when all elements in an information item (e.g., bits in a word) are acted upon simultaneously, | + | - Pertaining to the type of operation in a computer when all elements in an information item (e.g., bits in a word) are acted upon simultaneously, |
- The condition in which two comparably sized objects or figures are equidistant at all facing points parallel).\\ | - The condition in which two comparably sized objects or figures are equidistant at all facing points parallel).\\ | ||
===== PCB ===== | ===== PCB ===== | ||
- | Printed Circuit Board. Are usually made of [[http:// | + | Printed Circuit Board. Are usually made of [[wp>FR-4|Fibreglass]] or [[wp>FR-2|SRBP]] (Synthetic Resin Bonded Paper) with a copper laminate on one or both sides, forming the electrical circuit. A detailed Wikipedia article is available [[wp>Printed_circuit_board|here]]. Most MERG [[glossary_k# |
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The PECO implementation of the Point motor, notable because they are constructed so as to be directly attached to both N and 00 gauge PECO track, thus making it easier to line up the pull and throw of the point | The PECO implementation of the Point motor, notable because they are constructed so as to be directly attached to both N and 00 gauge PECO track, thus making it easier to line up the pull and throw of the point | ||
+ | |||
+ | ===== PEI ===== | ||
+ | |||
+ | [[wp> | ||
+ | Used for the printable surface on some 3D printers, especially the Prusa range | ||
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- | ===== PM ===== | + | |
+ | ===== PIC ===== | ||
+ | Peripheral Interface Controller. A complex integrated circuit which may be programmed to carry out a controlled sequence of events, ie certain output events controlled by an input event. | ||
+ | |||
+ | A brand of micro processor chip from Microchip, often used in MERG projects. Eg PIC18F2480. | ||
+ | ===== PICKit ===== | ||
+ | A device marketed by [[http:// | ||
+ | The pin out of the PICKit differs from that of the programming connector on MERG CBUS boards, see **[[helpsystem: | ||
+ | ===== PiSo ===== | ||
+ | **P**arallel **i**n **S**erial **o**ut, refers to a type of [[glossary_s# | ||
+ | |||
+ | =====PLA===== | ||
+ | [[wp> | ||
+ | [[wp> | ||
+ | ===== PM - Phase Modulation | ||
Phase Modulation. A specialist modulation mainly used in Radar equipment, the phase rather than the frequency of the carrier wave is varied in order to obtain information | Phase Modulation. A specialist modulation mainly used in Radar equipment, the phase rather than the frequency of the carrier wave is varied in order to obtain information | ||
- | ===== PIC ===== | + | ===== PM - Pulse Modulation |
- | A complex integrated circuit which may be programmed to carry out a controlled sequence | + | There are basically 3 forms of pulse modulation, Amplitude, Position, and width, each having its own characteristics and uses. This type of modulation may be superimposed onto RF or on DC voltages. |
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- | Solenoid Point motor /relay driver with onboard | + | Solenoid Point motor /relay driver with on board relay see TBG16/26 |
+ | ===== PMP ===== | ||
+ | Pocket Money Project. Excellent simple, basic and inexpensive kits to learn basic electronic theory and techniques such as soldering. Currently there are 23 Kits and most cost less than £2.00. You can find them in the Kit Locker [[https:// | ||
===== PNP ===== | ===== PNP ===== | ||
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- The orientation of the positive and negative poles in a battery or power supply relative to a circuit. | - The orientation of the positive and negative poles in a battery or power supply relative to a circuit. | ||
- The orientation of a magnetic field, relative to the surrounding environment. | - The orientation of a magnetic field, relative to the surrounding environment. | ||
+ | |||
+ | |||
+ | ===== POR ===== | ||
+ | |||
+ | |||
+ | |||
+ | Power ON reset i.e. just turning the power on to the whole system. | ||
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Abbreviation for Potentiometer see below | Abbreviation for Potentiometer see below | ||
+ | |||
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- | The means to facilitate manually driven trains following one another on the same track but in different electrical sections powered by different controllers. (See MERG Journal August 2005 page 10) | + | The means to facilitate manually driven trains following one another on the same track but in different electrical sections powered by different controllers. (See MERG Journal |
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- | Power supply unit | + | Power supply unit\\ |
+ | See also [[glossary: | ||
===== PTP ===== | ===== PTP ===== | ||
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RPC System - PTP (Point-to-Point) | RPC System - PTP (Point-to-Point) | ||
+ | ===== PTP-Lite ===== | ||
+ | Multiplex system using a RS485 bus, matching pairs of input and output modules communicate under the control of a master module.\\ | ||
+ | For details see these TBs: | ||
+ | [[http:// | ||
+ | [[http:// | ||
+ | [[http:// | ||
+ | [[http:// | ||
+ | [[http:// | ||
===== Pulse ===== | ===== Pulse ===== | ||
- | Can be any shape and is normally a short period of time | + | Can be any shape and is normally a short period of time. A rapid change of voltage or signal for a short duration. |
- | ===== Pulse Modulation ===== | ||
+ | ===== PWM - Pulse Width Modulation ===== | ||
- | There are basically 3 forms of pulse modulation, Amplitude, Position, | + | Pulse Width Modulation is a technique used to control devices such as motors and lights to vary the amount |
===== Pulsed output ===== | ===== Pulsed output ===== | ||
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{{: | {{: | ||
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glossary/glossary_p.txt · Last modified: 2021/08/08 05:25 by Wayne