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Xiaomi Mi Mix 3 announced: specs, features, price | Lrd12 Overload Relay

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Europe is a real patchwork of degrees of sketchy. German wiring standards are very high indeed, at least in the semi-industrial places (laboratories, hospitals) I worked. The real Schuko plug/socket design is quite nice and safe, and hard to find *not* implemented correctly in Germany. Other countries, not so much. And don’t get me started on English and South African wiring and plugs.

I would also use a solid state relay. And I would think about gluing the glass plate with high temp silicone to the PCB. This vastly improves thermal contact and so heat transfer which reduces peak temp and thermal lag in the control loop. Also it prevents exposed live wires even in case the glass breaks.

From instances I have seen in forums of melting outlets, they aren’t dopes. The bottom line is 120 V is terrible for power delivery and it is really unfortunate that US adopted that level. Often times it is the outlet failing even when used in specs, either from poor install, cheap outlet, etc.Also, they get damaged, it might have been fine when someone started using it, but they miss the damage.

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You know very well, I hope, that for dimming you need to use a random phase optoisolator not a zero-crossing one. Like MOC3020/21 for example. This is in the command/trigger circuit for the Mains swiching Triac. Now show us your Relay driven dimmer beauty concept. Is good to learn something new everyday.

Pools have come a long way. It used to be you had a pump and if you were lucky it had a mechanical timer switch on it. That was it. Now you have digital controllers and spa jets and heaters. You can even get them that connect to your home automation system. If your pool isn’t new enough to do that already, you can get a range of add-on accessories. For a price. [Rob] paid $500 to get a remote for his pool. It wasn’t even WiFi, just a simple RF remote. In 3 years, the transmitter had burned out ($300 to replace) and he decided he had enough. For $20, [Rob] added MQTT control and monitoring to his pool using an ESP8266. You can see the video description of the project below.

Then if one is only looking at getting warm water, then one can also just have the heat pump use ambient indoor temperature to make the warm water. It will efficiently give warm water, but heating the house would be just as efficient as using a large resistor. (But at least the warm water got cheaper. (and it cools down the house during summer if one empties the warm water out doors or down the sink.))

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On Wednesday, Flake voted against advancing controversial nominee Thomas Farr, a North Carolina lawyer who is up for a district court spot, during a Senate floor vote. And since then, Judiciary Chair Chuck Grassley canceled a committee meeting that would have included votes on more than 20 judicial nominees, apparently due to Flake’s key vote in committee.

It was only after more than four years of several multiday outages every winter that attorney Rebecca Neale and her husband, Thom, had an electrician install a manual transfer switch at their Bedford, Mass., home, and ponied up for a portable generator. Now they use it to provide power to the furnace, refrigerator, sump pump and select electrical outlets. “I waited so long because I’m cheap,” Neale admits. “But, I was tired of our lives being interrupted or worrying the pipes would freeze. I kick myself for not getting one sooner.”

Thanks for the pointer, it looks promising! The RF-controlled remote switch appliances that can be found for a few dollars are self-contained, I would think that a Wifi-based one could also be? Having a separate wire coming out of the box seems like an extra hazard to me. If you keep the thing self-contained with only mains-in/mains-out, I would think it is safer in the end, and removes the internal complexity of optocouplers.

I found the Sony A33 and A55′s AF tracking to be very fast and pretty accurate; almost too fast in some cases: If I let the central AF point wander off the subject for a fraction of a second, focus would quickly shift to the background. Many of the missed-focus shots I took were the result of this problem, versus the camera not being able to track focus quickly enough. Some high-end DSLRs have settings in their autofocus systems to adjust how quickly they respond to momentary loss of the subject. (Either from the AF point drifting off the subject, or for some interfering object passing between the subject and camera.) If Sony were able to add this capability to the A33/55, it could go a long way to reducing the number of missed shots, at least based on my experience.


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