Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [regulations]

Regulations relate to various legal and/or political requirements relating to electronics design. Examples include various radio frequency broadcasting spectrum regulations, aeronautics regulations, etc..

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What if we want to clamp/clip current to a certain value or range as we do with diodes for voltage?

I have seen diode clamping/clipping circuits and can see that they can work well with such simple construction. However, what if we want to clamp/clip the current to some value rather than voltage?
quantum231
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Kickstarter electronics and local regulations

There are some electronics projects on Kickstarter. For being successfull, they offer buying the product worldwide. I wonder how they are able to comply with all the local regulations, for example CE, FCC, ETL, CSA and so on... For a small team of…
Kevin X.
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Is the maximum audible noise from power supplies regulated in Europe?

Power supplies make sometimes a lot noise in the range of kHz. Is there a regulation for the maximum allowed noise emission for consumer electronics on the European market? Is there a regulation which would protect customers who buy an alarm clock,…
Jonas Stein
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Export restrictions when sourcing parts for PCB assembly in foreign country

If a company has a PCB design and wishes to assemble them economically, a natural choice is China. Some Chinese companies are asking for the parts (or some of them) to be shipped to them. This means buying the parts locally, shipping them…
apalopohapa
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868 MHz frequency standard

I am wondering whether I am free to use any transmit/receive methods on this particular frequency or do I need to stick to some standards. I am willing to buy a chip with PHY layer of 868 MHz and we do have the software MAC provided with it ( it is…
cerkiewny
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What regulatory hurdles do I need to conform to to sell my products?

I have products that involve some simple resistors and diodes etc that plug into the microphone jack of a mobile phone (they are sensors). What regulatory hurdles must I cross in order to sell on eBay to 'test the market'? The Low Voltage Directive…
user2633388
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Bringing compiled device to market (and how to power)

(Preemptive apology if this is the wrong place to ask; pointers to the right place appreciated) I've thrown together a device using a Raspberry-pi, touchscreen (plugs into pi) and small monitor type thing which has its own power cord and brick.…
canterman
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Current Regulation Drift

Over a 200ms period of which this circuit regulates a 500mA current, the current drift downwards for about 0.4%. At first I thought it was due to R202 temperature coefficient, but from my calculation the drift related to R202 should only be in the…
Damien
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How do I cycle a WiFi transmitter through all modes, for FCC intentional radiator EMC testing?

I'm integrating a WiFi/Bluetooth module into a consumer product, however the module does not have a modular grant, will not have a modular grant, and is anyway getting paired with a unique internal antenna. Per…
Bryce
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Must FCC-certified modules be labelled with the correct FCC ID?

The manufacturer of this radio module I bought claims that it's FCC certified, but there's no FCC ID on it (though there is the FCC logo). If the final product is to be FCC tested, would it then be tested as an intentional radiator since there's no…
Kar
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Which standard must Li-ion battery fulfil for CE marking in late 2020, IEC 62133:2012 or IEC 62133-2:2017?

I am looking for a slim CE-certified rechargable battery to put in my product. All of the (very few) certified batteries that I have found are compliant with the IEC 62133:2012 (2nd edition). But that standard is withdrawn since, I believe, March…
Jonatan G
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12 V wiring regulations (UK)?

What regulations (if any) do I need to follow if wiring a 12 V system (in the UK)? I was planning to wire up a garden shed / summer house to the 220 V mains. I'm confident I could wire it safely and sensibly, but not being up-to-date on UK wiring…
ConanTheGerbil
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If I incorporate a UL/NRTL listed power supply in our product, must we re-test?

We are building a product. It's a bench-top electrical testing thing, similar to a Keithley DMM or an oscilloscope in that it's something engineers would use at companies for testing stuff and occasionally would get built into other equipment. I…
Dave
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Zener diode can vary current flow to maintain voltage drop, how does this magic effect work?

So it seems that a zener diode is "magically" able to change its resistance to allow more current to pass through it, such that the voltage drop across the diode remains the same. My question is simple: HOW? I also have a question related to normal…
quantum231
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CE certification: battery-powered LED lights

There are lots of products on the market that are LED lights which don't all seem to carry CE markings. I'm looking at designing little ornamental things with embedded LED lighting, and trying to work out if this will require EMC testing or whether…
pjc50
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