Wallpapers from The Verge | 25 Amp Circuit Breaker

The rest of the circuit would be built on the backside, with judicious use of surface mount electronics rated for miltemp operation (to 125C). Standard connectors from Samtec or Molex can handle the current drive easily, with no problems from the heat. Add an acrylic conformal coat on the backside, or perhaps potting the electronics, and you can make the entire module one single brick module.

And this AC vs DC case when it comes to skin effect, is a reason for why some Data centers use DC distribution, as most server products uses switch mode power supplies and therefor has an internal bridge rectifier.

But 110/120v A/C? that stuff is baby-play, as long as you realize that you shouldn’t use both hands, or use grounding straps, it just kinda buzzes, I’ve played around with TENS devices that had more (felt) kick than it…

If I remember right Edmund sold a one ton lift magnet that would work with one dry cell. It was about 3 to 4 inches in diameter and half as thick with a single piece of iron with a circular groove for the coil. I saw a similar magnet lift a car at the Museum of Science and Industry in Chicago decades ago. The trick is perfect flat coupling to a thick flat piece on the load.

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.

One of Sony’s nifty tricks is their in-camera "sweep panorama" technology. The A33 and A55 let you shoot panoramas with the camera held either vertically or horizontally. The vertical orientation makes taller/narrower panoramas that are 5,536 x 2,160 pixels, as seen in the top photo above. With the camera held in landscape orientation, panoramas are 8,192 x 1,856 pixels.

Voltage TransientsVaristors feature high durability, which is essential for withstanding repeated high-peak pulse currents and high-energy surge transients. They also offer a wide voltage range, high energy absorption, and fast response to voltage transients. Peak current ratings range from 20 to 70,000 A, while peak energy ratings range from 0.01 to 10, 000 J.

I don’t know who all of you people are, but stop being ridiculous. This guy made an ESP8266-based TRIAC switch, and gave the design away for free. He has ample warnings on his web page about this project. I encourage anyone who wants to use this design to research the subject thoroughly to make sure they understand what they’re doing.

It doesn’t add up like that. What *does* add up is the power. At 240 volts, you pull twice as much power at 15A.

The earth ground connection won’t prevent you from being shocked unless it’s a GFI outlet. The soil resistivity in most places in the US doesn’t cause enough current to flow to earth ground to trip a normal breaker. Bonded ground systems are better, but if the bond from neutral to earth ground is far away from the short it might still not trip a normal breaker.

It calls out a MOC3041M on the silkscreening. One can use a MOC3041 of course as they are the same form factor.

I’d love to see a follow piece on how to work with High Voltage as well. Lots of interesting projects to do with microwave and neon transformers…