Charging Your Tesla Model 3 With Just A Wall Outlet | 19mm Momentary Push Button

Interestingly, I didn’t notice the unusual size of Sony A33′s viewfinder display when I first picked up the camera, but I became acutely aware of its loss when I switched back to a conventional sub-frame DSLR after having shot with the Sony A55 and A33 for a day or so. The conventional DSLR suddenly felt I was looking down a tunnel, and I also found myself greatly missing the richness of the A33′s viewfinder information overlays. The excellent image quality of the Sony A33′s EVF did a lot to win me over to the idea of EVFs on interchangeable-lens cameras, but it was the combination of image size and informational richness that really put me over the top. Because it could appear right there in the viewfinder, rather than on the rear-panel LCD, I was surprised to see how much I came to rely on the electronic level display for keeping my landscape shots straight when there was no obvious horizon line.

No need, really. You just need a few mates with smartphones – just enable the wifi hotspot on each of them, place them roughly in a circle and put your coffee in the center. Make sure to dismantle the circle before you reach in for your cup though if you don’t want to get fried too – safety first!

I had three electrocutions with mains voltage in about one hour. It was a dark and stormy night, when I decided to try again building my own half-bridge SMPS which had tendency to explode whenever I plugged it in. It was made of two boards: one contained EMI filters, bridge, fuse and HV electrolytic capacitors, other had high-side controller, transistors, transformer and everything else. When another transistor decided that it would rather choose new Pope instead of working, I got a bit angry. I grabbed something to drink in kitchen, returned and grabbed the board in order to smash it against the wall. I forgot to unplug it first. Ouch. Half a hour later, it was still dark and stormy night, I attempted to fix an ATX supply. When I was grabbing something from behind of supply, I touched the board with my forearm. Supply was plugged, of course. Ouch. Half a hour later, yes, it was a dark and annoying night, I was still working on the ATX supply. I unplugged the supply and was inspecting the traces, my nose and lower lip brushed solder pads of those two big caps that were charged to ~320V. I went to bed with my face hurting…

I can see exploding TRIACs happening more often on cheap dimmers and such due to under-rating the load and little to no heat sink.

Remember that, across the same resistance, power goes up with the square of voltage; 120v RMS can deliver 100x the wattage of a 12v supply, and 240v delivers 400x.

2. At the 1.8V voltage drop Mattias Wandel mentioned in the video, his SSR was dissipating about 40 Watts of energy and the metal bast plate he mounted the SSR to was not sufficient for dissipating 40 Watts of heat energy.

Rob complains that the board isn’t laid out for 240 VAC — yet I see ample clearance between traces. Other users complain that the board isn’t designed to drive a full 15A load, yet most commercially-available, UL-listed dimmers I’ve seen are rated for 800W or less. The Lutron dimmers I paid almost $30 a pop for only do 600W.

Just reach for the “Flame Wrench” while working on a press, in a corrugated box plant. Within the next two minutes, you’ll know how many fire extinguishers are in that building. Box dust and the old, grease based, Letterpress ink was always a major concern when you were doing the repairs and needed to use a grinder, torch or welder, etc..

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…

In their best days (unfortunately behind them), they have merely LISTED an appliance. (Listing is currently their TOUGHEST CRITERION).

And for the record, If I’m able to, I will breastfeed my children, because nutritional value, probiotics, and antibodies.

https://en.wikipedia.org/wiki/Extra-low_voltage >Extra-low voltage (ELV), in electricity supply, is one of several means to protect against electrical shock. The International Electrotechnical Commission and its member organizations define an ELV circuit as one in which the electrical potential of any conductor against earth (ground) is not more than either 25 volts RMS (35 volts peak) for alternating current[inconsistent], or ripple-free 60 volts for direct current under dry conditions.