Questions tagged [standard]

For questions about technical standards such as IEEE standards. Examples of such questions include: what a standard requires, how to meet the requirements of a standard in a circuit design, what capabilities and limitations a circuit designer can assume when incorporating a standards-compliant component in a design, etc.

For questions about technical standards such as IEEE standards. Examples of such questions include: what a standard requires, how to meet the requirements of a standard in a circuit design, what capabilities and limitations a circuit designer can assume when incorporating a standards-compliant component in a design, etc.

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Rules and guidelines for drawing good schematics

There are a lot of poorly drawn schematics here. A few times people have actually asked for critiques of their schematics. This question is intended as a single repository on schematic drawing rules and guidelines can point people to. The question…
Olin Lathrop
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Why was Mini USB deprecated in favor of Micro USB?

Mini USB connectors were standardized as part of USB 2.0 in 2000. In 2007, the USB Implemeters Forum standardized Micro USB connectors, deprecating Mini USB connectors four months later. Why? What are the advantages of Micro USB over Mini USB that…
Dan Fabulich
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Standard nomenclature for component types

What prefixes should be used on reference designators for components of various types? I think we can all agree that "R##" refers to a resistor, "C##" refers to a capacitor, and "L##" refers to an inductor. Beyond that, it appears to be a mishmash…
Kevin Vermeer
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Electronics System Standards Compliance: Certification, Testing & Verification

Please note: this question has to do with the technical compliance aspects of the consumer electronics indsutry, and as such, I believe is within scope for this site. This question is about compliance, and Compliance is absolutely a qualitative…
smeeb
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Why are there no 12V/5A USB PD chargers/batteries?

Any 100W USB PD 3.0 system must support 20V/5A charging. Naively I assumed that therefore they should support 5A at any of the lower voltage rails! But for some unclear reason, I cannot find any PD based system that will output 5A at less than 20V.…
Rafael
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What is a digital video port?

I see a few questions here casually mention that image sensor modules have a "standard parallel digital video port (DVP) or ... MIPI high-speed serial interface" "Where do I start with embedded video?" "Processor with hardware camera interface…
davidcary
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"Standard" components...?

In class we are designing a few different circuits and it uses some diodes and opamps. Everything is fine on paper and everything makes sense. These are only ever refereed to as a "diode" or "opamp". So then I made a simulation on pspice. However…
binarysmacker
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Is there a standard which requires a high voltage warning label on a PCB?

If part of your PCB carries high voltages at certain nodes, is there a standard that requires some sort of silkscreen label or sticker to warn technicians when installing/uninstalling boards into products? Lets consider high voltage to be any…
BobaJFET
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USB A mechanical orientation?

This concerns a USB A socket on a PCB. Is there a standard or preferred orientation of the polarization tab, either up or down? The picture shows one with tab towards the top
Dirk Bruere
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Official GPS protocol documentation?

Searching for "GPS protocol" reveals many sources for processed GPS data, e.g. NMEA or binary outputs of GPS units. Where is the official documentation for the GPS satellite - receiver protocol? Or any interesting supplemental material that might…
Mark Harrison
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How were standard serial port baud rates chosen?

How were standard serial port baud rates chosen? 1200, 9600, 115200, aren't the numbers we'd expect (powers of 2 or 10), but don't seem random either. Wikipedia states Many of these standard modem baud rates are multiples of either 0.9 kbps (e.g.,…
SRobertJames
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‘One for all’ standardized land pattern v.s. specified land pattern in datasheet

I’ve designed lot of ‘simple’ PCBs for hobby and proof-of-concept purposes, but never for (mass)manufacturing. In order to do so in the future, and further expanding my design skills and knowledge, I’m exploring the different package outline…
Julien Roels
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Standard Volt and Ampere

A recent question on here asking about how to calculate the accuracy of a circuit got me thinking about calibration in general. In particular, as EEs we routinely use volts and amperes as a unit and yet these are both rather vague and hard things to…
Trevor_G
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What is *actually* a *standard part*?

This is something that has bothered me for ages. I wasn't sure it could be made up as a question here, until Olin Lathrop suggested it to me in a comment to another thread . We all know what we are talking about when someone mentions, for example,…
LorenzoDonati4Ukraine-OnStrike
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How do you pronounce the following set of 'words'?

I've heard people pronouncing the following 'words' in different ways and I would like to know the correct way of pronouncing them. SPI (spy vs s.p.i) I2C (I.2.C vs I.squared.c) LED (lead vs L.E.D) I use s.p.i, i.2.c and l.e.d because these are all…
efox29
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