Portable 120V to 240V Converter; or How to Fast Charge at Your In-Law’s House | 220v Contactor Relay

So you have to put new wire to have proper L1 anyway, you might as well put one that will serve properly 7times faster.

But there are some compromises that come with more fluid visuals. Samsung’s FreeSync mode only supports 1080p resolution for now, and the company notes that it might cause some random weirdness with the TV’s brightness at times. Probably still worth switching on just to see the difference it makes.

Very nice. It’s similar to my Toast-R-Reflow power board (though that one has two channels and uses BTA-20s).

I have used a setup like this using two back-to-back “door-bell” transformers (220V to 9V) to play with neon tubes when I was a kid. The current was so low that even a lightbulb wouldn’t turn on. However, it was enough to teach me about electric shock from mains voltage when I have carelessly put my finger across the output terminals …

I think every power MOSFET in my box, most of them from reputable sources, have packages rated below the die.

The IEC61010 category ratings on an Agilent multimeter. Medvedev [CC BY-SA 3.0], via Wikimedia CommonsYour instruments such as multimeters, oscilloscopes, and their probes will all carry an appropriate safety rating for maximum voltage, surge voltage, and current. In modern equipment this will be denoted by specified classes each with their associated voltage defined under IEC 61010, though you may find older equipment with IEC348 or other national standard ratings (Fluke publishes a handy PDF explaining these standards in detail if you would like to know more). These ratings are important in ensuring that the instrument keeps you safe as you use it.

A coworker at JPL got bit by an ion pump supply. On-site health unit recognized abnormal EKG, sent him to ER. ER doctor diagnosed a congenital abnormality unrelated to the incident. But he ended up with a date with a nurse, so he considered it a worthwhile exercise.

Arc-Fault Circuit Interrupter (AFCI) circuit breakers run warm. This is normal, there’s nothing to report here.

• Pick your features: Models come with either a recoil handle (similar to a lawn mower) or electric push-button start, and one or more outlets to plug in extension cords. Some include covered outlets, illuminated control panels or automatic shutdown in case oil runs low. Portables can weigh from 100 to 250 pounds, so you’ll want to buy a wheel kit. With the wheels installed, a generator can be rolled like a wheelbarrow into place.

There are lots of big name professional meters that share the same ports for both. My Klein shares them.

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.)

I didn’t buy one, largely due to some compromises in the plug-in version. The very high load floor in the cargo area was a big downside for me, as it really limits cargo space.