The Expanse is being turned into an RPG | 19mm Momentary Push Button

Also, if you leave your oscilloscope floating at mains voltage with an isolation transformer puts you in danger as all earthed parts of the oscilloscope will be floating at that voltage. Again: when things are floating, it is ok to have 1 fault.. but the second fault will definitely kill you or break something as no RCD will protect you.

And even today people give the advice of plugging a computer in the wall and grabbing the metal case as you’re working inside it. Bad idea – if the PSU has failed, you may very well have live voltages in the boards.

This is overkill. You don’t need a safety-ECU for this. It is much safer to use the thermal fuse(s) you mention and they are sufficient. If the safety can done without CPU intervention, then do it. 2mil Kapton may have this standoff voltage, but it is scratched easily. I would bond the (high-tg FR4) PCB heater with silicone to a glassplate (pyrex or something).

HDR is a feature that’s easy to over-use, as it can quickly over-flatten the contrast of an image, resulting in a dull, lifeless photo. On the other hand, there are times when nothing else will do. I’ve shot a lot of landscape images over the years where I’ve really wished I had it; situations where there was bright sky and deep shadows, or a bright rockface but also interesting detail I wanted to capture that was in the shade. With an auto-HDR option, I often find myself trying it, but also shooting a normally exposed shot as well. I more often like the normal shot, but sometimes the HDR one is the keeper. (I really wish there were an option to have the camera capture three shots; a normally-exposed one and the the high/low exposure pair it uses to build the HDR image from. It’d be handy to be able to shoot a normal image, with the HDR shot as backup.)

The spark-gap Tesla coil itself was

As an electrician (among many other things), I cringe when I see people acting like line voltage is nothing to worry about. I’ve seen photos and video of people who died gruesome deaths because they either failed to take the proper precautions or had no idea what they were doing when handling line power. I spent years training to safely handle electricity, and then spent another 15 years working with it in industrial, commercial, and residential settings. Despite all of this experience, I still have a healthy respect for electricity, which has probably saved my life on more than one occasion.

Most PSUs are not designed to receive DC even if you calculate it correctly. The 4 rectifier diodes on the primary side are evenly used with AC but with DC only two get hot, the other two do nothing. It can and will most likely work but you may decrease the lifespan of the PSU.

253V above. The 3% voltage reduction equalled 5% of the load and 6% voltage reduction 10% of the load I seem to remember. Over 15 years ago.

I had a chance to spend a few days with a late prototype of the Sony A55 (equipped with production firmware version 1.0) prior to its release. (Note that the Sony A33 is so similar to the A55, that we’ve only made a few edits to this Field Test to make it work for the A33 review.) After running a couple thousand shots through it (it does have a very fast continuous mode) I found it to be a pretty compelling camera, combining remarkable shooting speed with a host of other capabilities that really set it apart from most of the market. It’s by no means perfect, but unquestionably expands the range of shooting capabilities open to consumers with average pocketbooks. Looking at just how much I found to comment on below underscores for me just how much Sony has done in the last few months. Read on for some of my thoughts on this new class of consumer SLR:

It should be possible. I used to have a heated tray for keeping my home brew beer and wine warm while fermenting. It was probably only about 30 degrees C but mains voltage.

Regular gasoline costs about $3 per gallon where I live, so it’ll cost (26 / 46 * 3) = $1.70 to propel the Niro the next 26 miles after the battery is depleted.

And if your primary and secondary are of different wire gauges, the thinner one becomes your limiting current factor. Wired in parallel gives the same ampere-turn count, but with less resistance, possible more AMPeres, so more aoere-turns.