No high school diploma? You’ve got options! | 25 Amp Circuit Breaker

He did specifically mount/build that setup around the possibility of failure. He talks about it in the first few minutes of the video. Kinda a hyped up headline.

I have seen a 10cm hole blown right through the middle of circuit board. I have had many repair jobs that it’s been obvious that lightning has hit the overhead power lines, exploded parts, vaporised PCB traces. Non of these had any negative outcomes except having to repair the device or throwing it in the bin, generally the latter.

The only powertrain available to test was the new, higher-powered 2.0-litre hybrid, designed to offer eco-conscious buyers who like a bit more performance an alternative to the resolutely fuel- and CO2-focused 1.8-litre. Mated to a six-speed auto, there are two standout features: chiefly, that the link between the accelerator position, revs and actual performance are better matched than ever before, with the CVT-esque disconnect between them now greatly – if not entirely – reduced, and secondly that, so long as you are happy to let the gearbox run as an auto, rather than play with the mostly superfluous wheel-mounted paddleshifters and try to act out your inner F1 driver fantasy, there is strong, smooth performance on offer.

SSRs can actually contain what is used here: optocoupler+triac or they may use optocoupler+mosfet. Just like individual triacs you will find that they suffer from the same issue: high power dissipation. A quick looks shows BT137 will burn 20W to switch a 5A load, I see 6W for the first 10A SSR I encounter. This is too much to dissipate in a small junction box isolated inside a wall. Meanwhile, a 10A relay will dissipate maximum 2.5W through the 0.1ohm contacts.

Thanks to the MOVs’ high energy dissipation, they can be used to suppress lightning and other high-energy transients found in ac power-line applications. They’re equipped to withstand large amounts of energy and divert this potentially destructive energy away from sensitive electronics located downstream. MOVs, which are also used in dc circuits, come in a variety of form factors (Fig. 1).

I started my hacking adventures decades ago with vacuum tubes and high voltages, and have to say that this is an excellent and important article. I’m not sure of the country of the author, but one piece of translation for those just getting started. The “Residual Current Circuit Breaker” here in the U.S. is called a “Ground Fault Circuit Interrupter”; but, provides the same protection. Another more recent protection innovation is called the Arc Fault interrupter and actually contains DSP type circuitry to determine if a dangerous arc is present on the line. Flipping a light switch or running a small motor creates an arc; but, the AFCI can tell the difference between that source and a frayed power wire that could overheat and start a fire. The largest voltage I’ve ever worked on was an amateur radio linear amplifier that ran 2600 VDC @ 600 ma for the finals, which brings me to the main point of this post. One additional rule: Always keep one hand in your pocket or one finger hooked in a belt loop. While it makes handling equipment more tricky, it keeps the power from having a path across your chest, which is also across the heart and lungs, which are electrically operated and can be severely damaged or stopped. BTW, I love the image of the sign/sticker in this article which hit’s the nail right on the proverbial head.

Of course in many parts of the world that’s not possible like it is here in the US where better than 60% of homes have access to NG

True, but I have never seen a product use them. They will probably become popular with wifi powered stuff.

Of course, after buying a 1000W PSU, I kept getting intermittent shutdowns and freezes after 30-60 minutes of gameplay or CAD work, despite remaining perfectly stable while mining for days at a time. The GTX670 has no backplate and last year a fan screw vibrated loose and fell on top of it while everything was running. The motherboard was toast so I ungraded it and the CPU (AMD FX9590), but the GTX670 itself seemed okay. Apparently not.

You don’t need a 3D printer to use a heated print bed for 3D printing? I’d think that having the rest of the 3D printer would more or less be required to use a heated bed to facilitate printing.

So it’s – what happens to this board at 110 Volts and what are the consequences and the same for 240V, 1000V 10000V, ALL of these voltages. So it’s about what voltage will cause consequences and NOT what it is going to do at a specific assumed voltage, or more to the point ** where are the first points of failure with increasing voltage and what are the consequences.

When it comes to celebrating the arrival of 2019, Clark County’s got everything you can think of, plus a little…