Marshall Headphones’ Bluetooth speakers are getting an Alexa update | Circuit Breaker Parts

80%? When dealing with high current loads I top at 70% to allow for wobble of line voltage. For something like a Water heater I’d drop that to 50% ratings to make sure the surge doesn’t cause failure.

That’s how you may get some serious, even life-threatening, internal RF burns without noticing anything.

Even though they are more expensive(dropped under 20 thought), you can already find the wifi version of this. Just search for wifi smart socket and you will find some.

Thanks again to the relatively short stature of the Sony A33, the remainder of the rear-panel controls are rather difficult to reach when shooting single-handed, even with the relatively light kit lens attached. There are only a few buttons, Function, Playback, and Delete, plus a four-way controller with a central OK button. This isn’t an issue if shooting two-handed, but you do have to change your grip fairly substantially to reach any further than the top quadrant of the four-way controller. With real-estate at a premium, Sony has only provided markings on the controller for the alternate functions offered during shooting (and in the case of the Up / Display button, during playback).

I think Brian’s point was that if the bond between the earth ground and the neutral return of the incoming premises power isn’t good enough, then the short to earth might *not* trip the breaker. Of course, it would likely start a fire instead (the resistance may not be zero, but it will be low enough to sink a great deal of power in most cases and a 15A breaker will tolerate a couple THOUSAND watts), but I think that if you can’t trust that the building is to code, then all bets are off.

You are right, FR-4 has a glass transition temperature of around 120°C, so if you heat up your traces above that, and take into account the mechanical stress from expanding copper traces, delamination is something waiting to happen sooner or later (especially if you design corners in your traces). Add to that the fact that you usually don’t measure the temperature directly on the traces to regulate input power, you could go way beyond 120°C in your copper traces. I don’t think a lot of DIY guys actually know that there would be high-TG materials on the market better suited for PCB based heater applications…

This thing is going to get really unhappy when you plug your 15 amp motor into it and it’s embedded in your wall outlet.

The camera can’t always perfectly compensate for how you move the camera during the panorama, nor for extreme perspective shifts, so you’ll sometimes see "stitch errors" in the assembled shots. The slight "stuttering" above left in a shot from the Sony A55 is typical of the mild errors that sometimes occur: Pretty unobtrusive, unless you really zoom in to pixel-peep. More dramatic errors like the crop from an A560 panorama seen above right were fairly rare in my experience. This is a great feature for dramatic vacation snapshots, but if you’re making panoramas professionally, you’ll still want to build them manually from separate shots.

In this case, multiply the number of times you charged the car by 8.9 kWh for a low estimate of electric power consumed. For a better estimate, you need to know what the battery charging losses are. It takes more than 8.9 kWh to charge an 8.9 kWh battery – some of the power gets lost to heat. I can’t find authoritative data, but posters on Tesla forums claiming to have measured this report losses between 10 and 20%. If you assume it’s 15%, then it’ll take 8.9 / (1 – .15) = 10.5 kWh to charge the Niro’s battery.

While no standard is perfect, I have found that knowing the NEC and looking carefully at manufacturer listings and labels can save you time, your customers money, and help keep everyone safe.   

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Due to its diminutive stature, most photographers will find that the grip only accommodates two fingers, with the index finger resting on the shutter release button above, and the little finger curling beneath the bottom of the camera. This might seem a little crowded, but with the light, plastic-bodied 18-55mm kit lens, handling is nonetheless good, with the combination feeling extremely well balanced. Using larger, heavier lenses, the grip size is too tiring for single-handed shooting, so the photographer’s left hand will need to serve double duty, adjusting zoom or focus while simultaneously taking up the weight of the lens itself.