en:navody
Differences
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en:navody [2019/01/29 16:14] – [Connecting the oscilloscope probe] fluktuacia | en:navody [2019/01/31 14:08] – [RS-485] fluktuacia | ||
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==== Power supply ==== | ==== Power supply ==== | ||
- | Powering | + | Power provided |
=== Power supply up to +5V === | === Power supply up to +5V === | ||
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== 3.3V == | == 3.3V == | ||
- | Power voltage | + | Power voltage |
=== Voltage higher than +5V === | === Voltage higher than +5V === | ||
- | This category usually involves 7.2 (2x Li-ion cell) or +12V (lead-acid battery or other power supplies). For safety reasons it is therefore led via a yellow (+) and black (-) cable, following | + | This category usually involves 7.2 (2x Li-ion cell) or +12V (lead-acid battery or other power supplies). For safety reasons it is therefore led via a yellow (+) and black (-) cable, following |
{{: | {{: | ||
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=== Symmetrical power supply === | === Symmetrical power supply === | ||
- | This kind of power supply, conventionally +12V and -12V, is used in analogue constructions, | + | This kind of power supply, conventionally +12V and -12V, is used in analogue constructions, |
{{: | {{: | ||
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=== Very high voltage power supply === | === Very high voltage power supply === | ||
- | It includes power voltage in range of hundreds volts to ones of kV. Such powering is used for certain special detectors or gas discharge lamps, LASERs, etc. It is distributed via a coaxial cable with SHV or MHV connectors. | + | It includes power voltage in range of hundreds |
==== High-frequency signals ==== | ==== High-frequency signals ==== | ||
=== Asymmetrical signals === | === Asymmetrical signals === | ||
- | Analogue VF signals are distributed in MLAB via a classic VF Pigtail usually made form coax RG-174 with both ends having a screw-type SMA (Male) connector. | + | Analogue VF signals are distributed in MLAB via a classic VF Pigtail usually made from coax RG-174 with both ends having a screw-type SMA (Male) connector. |
{{: | {{: | ||
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==== Digital buses ==== | ==== Digital buses ==== | ||
- | Digital buses, such as I2C, TWI or 1-wire are distributed between the modules via standard cables, usually only adjusted so that one plastic ending contains all the bus’s wires, | + | Digital buses, such as I2C, TWI or 1-wire are distributed between the modules via standard cables, usually only adjusted so that one plastic ending contains all the bus’s wires, |
===== Maintenance and cleaning ===== | ===== Maintenance and cleaning ===== | ||
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==== Interconnecting cables ==== | ==== Interconnecting cables ==== | ||
- | Due to a gradual wear by a mechanical switching, the interconnecting cables’ connectors loose their conductivity. It last several hundreds of connections and re-connections until the phenomenon occurs, but it might be speeded up by careless transport of already connected constructions, | + | Due to a gradual wear by a mechanical switching, the interconnecting cables’ connectors loose their conductivity. It lasts several hundreds of connections and re-connections until the phenomenon occurs, but it might be speeded up by a careless transport of already connected constructions, |
- | The above-mentioned state can be repaired by | + | The above-mentioned state can be repaired by napružení kontaktu konektoru |
- | + | ||
- | U propojovacích kablíků se v důsledku jejich postupného opotřebení mechanickým přepojováním snižuje vodivost jejich konektorů. Trvá řádově několik stovek zapojení, než se tento jev projeví, ale může být urychlen například neopatrnou přepravou zapojených konstrukcí, | + | |
- | + | ||
- | Tento stav lze napravit opětovným napružením kontaktu konektoru šroubovákem, nebo jiným podobným nástrojem. To se provádí zvenku u zámku konektoru. tlakem na pružinku proti stolu. | + | |
==== Modules ==== | ==== Modules ==== | ||
- | Most of the modules | + | Most of the modules |
<WRAP info> It is not possible to use electrostatic duster for a dust removal as it might cause a destruction of certain electronic circuits in modules </ | <WRAP info> It is not possible to use electrostatic duster for a dust removal as it might cause a destruction of certain electronic circuits in modules </ | ||
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=== Screw terminal === | === Screw terminal === | ||
- | There are two widespread | + | There are two widespread |
The first type is more common mostly due to its low price. However, thanks to using a sheet metal washer under screws, it is not possible to fasten a naked wire of small diameter well into this type of screw terminal. Furthermore, | The first type is more common mostly due to its low price. However, thanks to using a sheet metal washer under screws, it is not possible to fasten a naked wire of small diameter well into this type of screw terminal. Furthermore, | ||
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=== Spring terminal block === | === Spring terminal block === | ||
- | Spring terminal block are an excellent modern substitute for screw terminals, which are slowly becoming technically obsolete. Their disadvantage, | + | Spring terminal block are an excellent modern substitute for screw terminals, which are slowly becoming technically obsolete. Their disadvantage, |
One of the commonly used spring terminal block is WAGO256. | One of the commonly used spring terminal block is WAGO256. | ||
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==== High-frequency signals ==== | ==== High-frequency signals ==== | ||
- | High-frequency signals are led to external devices in the same way as they are between modules - via coaxial | + | High-frequency signals are led to external devices in the same way as they are between modules - via coaxial |
In order to connect distant devices, such as receiving antenna, F-connector is a good choice, mainly thanks to its easy assembly and disassembly, | In order to connect distant devices, such as receiving antenna, F-connector is a good choice, mainly thanks to its easy assembly and disassembly, | ||
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=== USB === | === USB === | ||
- | The most widely | + | The most widely |
{{: | {{: | ||
- | Using an USB connector on a module requires placing a current fuse into the charing from USB (usually 750mA PTC). Otherwise a short circuit can cause a fall of HOST system and thus a data loss (of a tuned program). | + | Using a USB connector on a module requires placing a current fuse into the charing from USB (usually 750mA PTC). Otherwise a short circuit can cause a fall of HOST system and thus a data loss (of a tuned program). |
=== RS-232 === | === RS-232 === | ||
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=== RS-485 === | === RS-485 === | ||
- | In industry, this bus is used with terminal blocks. Therefore it is suitable | + | In industry, this bus is used with terminal blocks. Therefore it is practical |
=== CAN === | === CAN === |
en/navody.txt · Last modified: 2023/01/15 12:59 by 94.112.192.193