Electronics > Projects, Designs, and Technical Stuff

EMF pickup from amplifier in I2C line causing glitches. (Now with scope trace!)

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CJay:

--- Quote from: Starlord on July 06, 2016, 11:43:35 am ---
--- Quote from: CJay on July 06, 2016, 11:34:12 am ---*snipped more whinging about how unfair the world is and justification of illegal actions because 'bigger boys did it first'*

--- End quote ---

You also snipped the bit where I said you were in no position to judge me because you yourself break the law on a daily basis.

--- End quote ---

Explain where I admitted breaking the law?

I accept responsibility for my actions and do not try to argue that they are OK because other people do it too.

Like I said, grow a pair and accept you are in the wrong.

Compliance testing laws are put in place because irresponsible people sell products that have potential to cause significant problems for legitimate users and manufacturers of well designed products.

Has it occurred to you for one second that the emissions from your 'product' won't be limited to just the HF bands?

dmills:

--- Quote from: Starlord on July 06, 2016, 11:47:40 am ---, do you really think military radio communications can be jammed by a tiny device powered by a 12V battery?

--- End quote ---
Get me close enough to the victim device, and NOT a problem!

GPS for example is trivially easy to jam, mostly because it is so very weak at the receiver, and trashing the military codes will not be that much harder then the civil stuff.
 
I can cite a couple of deaths where radio comms problems were at least contributory, mariners who tend to use the HF bands for ship to shore when out of range of the VHF set (Which is limited to maybe 20 miles or so off shore), and the aircraft emergency frequency on 121.5Mhz has been taken out by a malfunctioning plasma telly before now (Tracked down and confiscated by the authorities, no deaths that time but mostly by good luck).

I have had a ONE TRANSISTOR reset circuit for a small micro cause an EMC fail (The thing had enough base inductance to cause it to take off at VHF, solved with a base stopper), you see the strangest things when you start looking.

Regards, Dan.

Starlord:

--- Quote from: CJay on July 06, 2016, 11:59:09 am ---Explain where I admitted breaking the law?

--- End quote ---

You speed.  Don't lie.  Everyone does.

CJay:

--- Quote from: Starlord on July 06, 2016, 11:47:40 am ---
--- Quote from: CJay on July 06, 2016, 11:34:12 am ---You *really* need to understand a *lot* more about what you're inflicting on the world, I doubt very much you will be only interfering with CB radios, there are emergency service, military, civil aviation and many other users of the HF bands that you're merrily polluting, you claim that speeding is less morally acceptable than the risk of blanking communications by those users?

--- End quote ---

Over 32,000 people die on the roads each year.  I challenge you to find a single instance of radio interference resulting in a death in the last 25 years.

Also, do you really think military radio communications can be jammed by a tiny device powered by a 12V battery?

--- End quote ---

These do ya to be getting on with?

http://www.nybooks.com/articles/2000/09/21/swissair-111-twa-800-electromagnetic-interference/

http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10701029

As for 'jamming', it's unlikely you'd be able to effectively 'jam' communications but you can most definitely cause significant problems for legitimate users of the band you're merrily spewing interference onto.

Your insistence that it doesn't matter because you will only interfere with CB radios is actually a pretty good point, in the US an FCC certified CB radio is capable of transmitting 4 watts of amplitude modulated carrier, they generally run on 12V (even the line powered solid state units are 12V internally) and consume less than 2 amps.

None of your arguments for why you are entitled to eschew your responsibilities hold water.

Pretty much the same power you have available for your device.

CJay:

--- Quote from: Starlord on July 06, 2016, 12:15:13 pm ---
--- Quote from: CJay on July 06, 2016, 11:59:09 am ---Explain where I admitted breaking the law?

--- End quote ---

You speed.  Don't lie.  Everyone does.

--- End quote ---

Prove it.

I can prove I don't.

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