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Comment: Re:Know what else is 10,000x faster than flash? (Score 1) 69

by CatBandit (#43994523) Attached to: Computer Memory Can Be Read With a Flash of Light

A simple microcontroler (like Microchip's PIC16xxx) has FLASH memory and has access to it at the same speed as RAM. Running at clocks from 20 to 40MHz.

Not to mention ARM's and other similar devices who work at much more speed... smarphones maybe ?

Access to flash may be crippled by interface in the case you mention.

Comment: Re:Too little too late (Score 1) 628

by CatBandit (#43470681) Attached to: Windows 8.1 May Restore Boot-To-Desktop, Start Button

I had the same problem, but in the cars I used, I found it easier to stick my left foot on the leftmost part where there was something similar to a fixed pedal made of plastic out of the side of the car, just to leave your foot rest there. When I had the instinct of activating the clutch, I just pushed there with no fatal consequences.

Comment: Re:Prior use (Score 2) 354

by CatBandit (#42273911) Attached to: ITU To Choose Emergency Line For Mobiles: 911, or 112?

I think this is probably an important rule that you cannot break in international numbering conventions (someone better informed could enlighten us). I say this because 10 or 15 years ago there was a huge numbering restructuration (due to increasing mobile numbers) to allocate a special numbering for mobiles (cellulars ?), and when it was done I remember several experts arguing to follow the international numbering rules to avoid this overlapping.

So if you have 911 for an emergency call, you won't be able to have any 911xxx number afterwards. It's not a big issue, just to confirm 911 at least has one clear numbering in conflict here in Europe.

I would be interesting to know if there is any on the other way (112).

Comment: Re:Testing Circuit Failure? (Score 3, Interesting) 241

by CatBandit (#40554263) Attached to: San Diego's Fireworks Show Over In 15 Seconds

Agree on this. This is a test procedure with firing currents instead of test currents.

I designed the electrical and sofware part of a Firing System, and the matches needed much more than 100mA to fire, the 5mA seems on the test range.

In our case our circuit tested the whole show in just a few seconds like this (each match every 0.05 or 0.1s). So if firing current (>>100mA) was applied a faulty test would do this.

But because of this (this is also an economical disaster for the company), the test procedure is hardware forced with low current, with redundant circuits that block that disable the firing current by two or more ways by different systems, that means, that software and hardware must enable the fire.

As this fired at the three places at the same time, this seems a completely software plattform with no apparent HW securities... bad idea.

Comment: Re:So... what? (Score 1) 468

by CatBandit (#35587012) Attached to: University Switches To DC Workstations

I'm an EE and we are continously developing different products.

It happens quite often to touch active parts of a circuit by accident while testing / debugging prototypes.

I am not a (by any point of view) brave/crazy EE who likes the risk of an electric shock, but in the usual work you touch active circuits everyday. You do this because you know which are active parts that harm and which are active parts that don't harm you.

There are circuits you always take good care to not put you naked hand onto:
-It's quite clear that 230VAC (standard in Europe) electric shock in your hands is quite painful, to me it's not harmful but really disgusting ( YMMV )
-On shock at 125VAC it's noticeable but it's clearly less painful than 230VAC.
-I've never had the "pleasure" to be shocked with 400VAC, and I prefer to not experiment it. What I can assure is that a contact with a 350VDC charged capacitor is quite disgusting, it even can make minor superficial burns.

Then there are the clear safe circuits you know you can touch without risk (and while debugging I can assure you it's quite often to do):
-5VDC and lower voltage circuits to power supply IC's.
-12VDC or AC or 24VDC or AC. DC is typical for relays, AC is typical for electrovalves.
-30VDC is the legal limit for circuits surrounding a short distance in a swimming pool, so it's quite safe to touch in a dry environment.

Then there is the middle zone where you never know:

-48VDC circuits (some communications power supplies)
I've recently completed a design that had this power supply and haven't noticed anything

-75VAC circuits (ringing phone lines)
It's easy to have a bad experience manipulating the phone line while someone rings you. Just a small shock, not very painful.

So in my experience the zone between the 50V and 60VDC is where it begins to be noticeable. Of course 48VAC will be noticeable as the peaks will be 1.41 over 48V (67.68V peak).

Don't take this as a guaranteed guide, but it's worth my 20 year of experience in electronic circuits design and manufacturing.

Comment: Re:Virus? (Score 1) 105

by CatBandit (#35297984) Attached to: Mobile Spyware Conferences Into Your Calls

You are correct.

Then it's the same it happens with email. Only one email fellow with a trojan makes you receive a lot of Spam.

It's time to educate people you talk to the same way you try when you are talking with email fellows.

I understand what you say, but installing an app out of official Marketplace cannot be seen as an accidental trojan infection (at least in my personal experience), you have to disable a couple of settings to be able to do so in a stock phone, so when someone does this it really wants that bogus app, then we have arrived at a social issue.

Comment: Re:Virus? (Score 1) 105

by CatBandit (#35291550) Attached to: Mobile Spyware Conferences Into Your Calls

But I ask the same I asked in the last Android trojan discussion here:

- On Android the app was installed from a bogus marketplace, so if I do not change this default android restriction (you are not able to install apps out of official marketplace without explicitly changing configuration with a beautiful warning), how is this a problem to a "normal" (maybe security conscious) user ? When you give a certain degree of freedom in a device, uncautious users are able to make this things even after several warnings against this.

- Is the issue Similar in the symbian OS ?

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