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To be fair, it's much harder to see the difference on a monochrome o'scope. Once you get a color scope, you can clearly see that one signal is yellow and the other is red.

http://i00.i.aliimg.com/photo/...

Tesla?
Why not just strap two golfcarts together?
Just buy one of these.

Ok, compare your fluke and sparkfun images to theses:

http://i01.i.aliimg.com/wsphot...

http://image.dhgate.com/albu_2...

http://img.dxcdn.com/productim...

http://fasttechcdn.com/product...

http://m4.uxcell.com/photo_new...

My point is, sparkfun, hasnt done anything special. Many Multimeters on the market have that same design.

why should the EU MANDATE anything in this regard? let companies choose whats best for their designs. EU makes me barf sometimes. hint hint: let companies design the best products for less money and your economy will grow.

Because this is the mess that the free market left us with.

Unlike the US, if corporate policy is harming consumers then the EU is more willing to step in and legislate for consumer's benefit. How exactly is allowing companies to churn out endless expensive proprietary connectors forcing consumers to waste money throwing away incompatible power adapters going to help the economy? Seems more like the broken window fallacy to me.

in america we believe in something called private enterprise. where people can make products and sell them.

Rubbish, the US has plenty of standards. Would you like to see every home and apartment have its own proprietary mains power sockets? Every car manufacturer have its own type of filling nozzle? Every wi-fi router require a proprietary wi-fi adapter? Every TV and DVD player have its own proprietary video connector? No, I didn't think so. Why should phones be any different?

Remember that this was the free market's answer to phone charging, the EU decided that it was in citizens interests that a standard be set up so we don't have to deal with endless proprietary cables any more.

Because, while it would be an improvement over the situation before of completely proprietary power adapters, you still have the problem of over-priced proprietary cables and having to carry your device specific usb cable around rather than just being able to grab any micro-usb cable. Do you really want to go back to the days of dealing with this?

http://i01.i.aliimg.com/img/pb/419/444/420/420444419_371.jpg

Actually, the GP is right about 380 amps. To charge a 2.1Ah battery, you need 2.1/3600*20 amps at the battery's voltage.

You're also right in saying that your household power supply can easily take it at high voltage, but you must take into account the conversion to low voltage too.

The charging equipment would simply be huge and the cable and plug would be ridiculously impractical at 380A.

You'd need something in this order of magnitude :)
http://i01.i.aliimg.com/wsphoto/v0/575796945/GENUINE-ANDERSON-SB-350A-600V-POWER-CONNECTOR-WITH-2-0-AGW-CONTACTS.jpg

When you're handling 15000 dollar circuit boards using a wrist-strap is always a good idea..

Not much protection of the circuitry here: http://i01.i.aliimg.com/img/pb/349/310/467/467310349_361.jpg

Some of the input slave cards are highly sensitive to ESD, and we've had some fry.

Damn reliable if properly handled though. Do not think I have ever seen one fail in use.

I gotcha Magic Finger right here.

And Here.

And here.

And (finally) here.

ATM machines mean most of the money is locked away in safes - and spread out over many branches, convenience stores, etc.

This is an ATM.
This is an ATM machine!

So you won't find any money inside of an ATM machine. ATM machines only build ATMs, so they are full of ATM parts. If you are after money, you should more likely go after the ATM itself.

And knowing is half of the battle!