New Google Classroom update makes it harder to cheat on quizzes | Lrd12 Overload Relay

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.

Just took a few seconds? the speed of light must be a bit slower in whatever dimension you’re living in.

When finished “fixing” things, you want to make sure, your device is still safe to the user. For this you need these testers.

But at the same time, if one wants a high efficiency power supply, then the manufacturer typically have placed in a rectifier that is technically over specified for the job, as these devices are generally not that expensive, and are an easy way to cut down a few watts overall without adding any substantial extra cost.

Using SO for internal wiring is something that I have often done — it is resilent, flexible, and high temperature. Also a joy to strip.

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Solar water heaters are nice. Sadly, when one gets far north, the sun isn’t a common sight during the cold parts of the year.

Prior circuit. The OP says in the thread that he puts 8 foot cords on his so he doesn’t need to use an extension cord. Personally I’d go longer, also I’d keep a common “3-lamp” outlet tester handy.

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.

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.

I’d like to say that I’m also grateful to TJ and other contributors for their contributions, inputs and replies, I did learn things and this increased my awareness of potential hazards. [I’m basically a SW developer doing 3.3V electronics, so any insight on mains operations from those who have experience is welcome.] Even though there may be some unwarranted background noise, the discussion is interesting, and dealing with mains surely is worth a few questions. Not knowing is not a problem, not wanting to learn or daring to ask is…

I am not going to go right into the above calculations as there are plenty of graphs and tables out the on the net that you can google for. Example – http://electronics.stackexchange.com/questions/22796/creepage-distance-for-pcbs-handling-line-voltage-ac, http://www.smps.us/pcbtracespacing.html