Samsung’s 2018 TVs now support FreeSync for smoother gaming | 220v Contactor Relay

This certainly looks like one of the more impressive ARM-powered Windows 10 laptops we’ve seen so far. The first few devices ran on the same Snapdragon 835 chip found in Android smartphones from last year, and they showed early promise with some issues that still needed work.

A few people made some useful design suggestions. I like the Power Integrations LNK switch suggestion for power. I’d also recommend looking at the SR086, which does the same thing — but it’s inductorless! That’s the chip I’m using for my ESP8266-based WiFi dimmer.

It’s a great idea but a shame it isn’t laid out correctly, The traces on the low voltage side of the opto-couple are too close to the mains voltage and also the trace from resistor R8 to the opto is too close as well.

All EVs come with a means to be connected to the power grid. Technically speaking, the charging station that converts AC house current into DC electricity is built into the vehicle. Most models include a basic 110-volt charging unit that plugs into a standard electric outlet via a conventional three-prong plug.

The only way, AFAIK, to know how much current it is actually supposed to be capable of is to calculate it based on the listed thermal resistance from junction to case, the thermal resistance of your heat sink from case to ambient, and the Rds(on).

The leads on that TO220 case SCR and that solder trace are not going to handle 20 amps continuously without heating up. A SCR that’s up to the task of carrying 20 amps for hours on end would have a TO-218 case or even be stud mount. If all else fails you could just use a contactor relay which is what they normally use for this application.

Probably best to derate to 1.5x or 2x. But even then, are the “solder” conductors inside really going to be any different? Looking at then they appear to crate a conductor way bigger than 25A requires.

I’ll try to fix your old item if I can, but I might ask you to have a new replacement on hand just in case. Don’t skip the shopping trip because you’re banking on me being able to fix the old one. If it’s beyond repair, I’ll need to come back (and charge you) for a second visit once you get to the store instead of finishing the first time around, ultimately costing you more. You’re better off buying it and returning it if we don’t need it. Just don’t bother with these 32 home upgrades that are a waste of money.

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I can’t think of any good reason for a toggle switch to get hot. If I ever found a hot toggle switch, I’d call that a fire hazard and recommend repair.

Sure I expect my line voltages to vary especially given that the actual spec for my line voltage (UK) is 230V +10%/-6% – my nominal voltage where I’m sitting is around 242V and I’ve seen it go as high as 252 and as low as 220.

Handheld Twilight mode captures a batch of high-ISO images, reducing blur from camera shake, and then averages the aligned exposures so as to reduce image noise. A new Multi-Frame NR mode acts similarly, but allows the ISO sensitivity to be selected manually, allowing use even at lower sensitivities. Of course, these effects could all be achieved in a PC with some work and know-how, but what’s impressive is that they’re now available with a minimum of fuss, in-camera. To ensure that even inexperienced photographers can derive benefit from these features, Sony has also created a new Auto+ exposure mode that can identify when these functions might be of use, and then enable them automatically.