AFCI circuit breakers and the problem of ‘nuisance tripping’ | Lrd12 Overload Relay

In cases of energy shortfall, we could apply 3% or 6% voltage reduction from our central control, to shed load. (along with asking manufacturers to reduce load, part of their contract) Before real load shedding, switching off supplies. I know. I was a control engineer. Admittedly a few years ago

AC is safer than DC. You can let go of two AC terminals but not DC as DC keeps your muscles clenched. AC doesn’t.

NEW YORK (AP) — Wells Fargo will pay $575 million in a settlement with attorneys general from all 50 states…

We first saw this feature in Sony’s DSC-TX1 and DSC-WX1 in mid-2009. Since then, it’s been mimicked by other manufacturers, but none seem to do it as well as Sony. In Handheld Twilight mode, the camera captures up to 6 shots in rapid succession, micro-aligns them with each other, and then adds them all together. The net result is that you can hand-hold ridiculously long exposures and still get sharp results, with very low image noise to boot. Combine this with Sony’s SteadyShot image stabilization and sharp handheld photos at half-second exposure times are feasible.

We’ve seen very few car charging hacks. If you know of one, or have been working on your own, let us know!

Heat is a result of the friction of electron flow. Half the current at double the voltage should result in roughly half the heat if using the same size wire. It’s why our grid transmits at 100k volt over long distances.

Of note, too, is the fact that there is a choice of just two petrol hybrid engines, a decision Toyota says is down to there being no significant customer demand for either a straight petrol or diesel.  There’s the 121bhp 1.8-litre motor currently used in the C-HR and Prius, plus a new 2.0-litre version with 178bhp, each attached to different hybrid systems. These will be offered with the hatch and Touring Sports (estate), which will be sold in the UK.

I’m constantly amazed by the use of a giant blob of solder to increase the cross section of PCB traces meant to increase their current carrying capability.

Teslas are a special exception since the S, X and Roadster all took a 30% hit to efficiency when charging at 110 and really needed 190-240 to charge efficiently. Other brands like GM or Ford or Toyota seem to charge relatively efficiently at 110.

And here I am telling the tale, one reason I snort whenever the momma’s kiddies post their “safety warning” comments on HaD.

I have to say up front that I’ve never been a fan of EVFs. While they do permit much more information overlay than conventional optical viewfinders, I’ve always felt that EVFs’ limitations have outweighed their advantages. In particular, EVFs usually have limited sensitivity and dynamic range, not to mention low refresh rates and poor resolution when compared with the view through a conventional optical viewfinder.

This doesn’t make any sense, why not use an extension cord with the 220 already in the house? A 6 or 8 gauge cord for 75 feet should be perfectly fine.