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Comment you got it wrong too (Score 1) 476

The cable doesn't know anything about the battery state. The cable is a souped-up extension cord with some protection and detection. The charger in the car does the charging, it knows the battery state. The EVSE (the proper name of this cable) is not supposed to shut off when the current goes down, the charger in the car will take care of that.

The car has always stopped charging at full, since trickle charging a Li-Ion battery is a great way to put excess wear on it.

Tesla's EVSE may be cutting off due to power problems. While it may not be Tesla's fault specifically, this would be an issue Tesla has to address.

Comment standard deviation doesn't weight by observation (Score 1) 312

It weights by the difference between the observation and the mean, by the variation. So large observations are not weighed any more than small ones. Two observations equally far from the mean get equal weight.

Widely varying observations do get higher weight and that is intentional. Standard deviation is that way because it is so useful in analysis of variance and measuring likelihood of statistical significance.

Comment but it didn't remove the option. (Score 5, Informative) 130

The agreement was not to reach out and poach others' workers. It wasn't to refuse to hire them. You still had the option of getting a 25% raise to go to Google, all you have to do is apply to Google.

The agreement didn't reduce the options available to people, it just made it so the engineer had to take the first step, the recruiter wouldn't call you to entice you.

Comment Re:Stunning preview? (Score 2) 94

Google also does that. They integrate panoramia pictures in some locations.

Go to "Old Tucson Studios" in google maps (not the preview). Grab the man and drag him to a spot on the map. You will get pictures of the different buildings. In some you can click on other areas which will transition to another picture a different person too. You can move around like this. It's all from public pictures.

Google hasn't integrated this into the preview yet, so they clearly don't know what to do with it yet.

Comment it's more like bearer bonds (Score 3, Insightful) 258

And issuance of stock certificates. This person is allowed to continue his work if he works according to the regulations.

Same with those who issue stock certificates.

Bearer bonds are so heavily regulated that you never see them anymore in the US, some say they are essentially illegal in the US now.

Comment Re:if you can access it on a website (Score 1) 107

Oh. Okay. The single page project page wasn't all that descriptive so I went by the summary partly and stated you had to go to a website and enter a PIN to log in. It wasn't particularly clear.

If this is just a smartcard, then this system has been in use for at least a decade. MS' internal VPN system used a smartcard login system, and IE supports it. That system is even more secure actually because it uses a challenge response and a PIN, it doesn't just decrypt a password which can be captured on the host computer and reused.

Comment please go back to apprenticing (Score 3, Informative) 1010

No, a breaker doesn't immediately trip at 0.1A over. Not even close.

And you say there are 40A outlets? No kidding. I would think you'd know the names NEMA 14-50 and NEMA 6-50 (stove/dryer outlets). This article isn't about NEMA 14s or 6s or the rare 5-50., it's about regular NEMA 5 household outlets ("standard 115v nominal household (NEMA 5-15p) plug is rated for 15 amps").

Please tell me your name so I can know I'm not having you wire my house.

Comment it's not 8.3A (Score 1) 1010

It's 12A. And the breaker will be at 15A. 12A is the max allowed for continuous on a 15A circuit (20% derate) and car charging is considered continuous use by code.

The breakers will not be rated for over 20A. It depends on the wire, but the outlets aren't rated for more than 15A usually, 20A tops and you cannot put a breaker higher than the outlet rating on a circuit in the US. In other countries like the UK where outlets are individually fused, you can have a high power "ring circuit" such as you speak of.

It is very easy to trip circuit breakers charging EVs off random outlets like this. This alone is a good reason for people not to charge off random outlets like this, think of the people inside who lose services because you tripped their breaker.

Comment a Leaf takes about 1.5kW (Score 1) 1010

12A/110V.

Not 1kW.

I don't know about arrested, but this kind of situation has to be controlled. It's super easy to blow a circuit breaker charging an EV off a 110V outlet. And some outlets where the wires aren't connected well will heat up and that can be a problem.

Let's see more EVSEs installed and then we won't have to worry about this issue. And maybe we can charge a little quicker too.

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