Power goes out when pc turns on – Components | Lrd12 Overload Relay

If Handheld Twilight and Multi-Frame NR modes are practical, Sweep Panorama is just plain fun. I’ve always been a fan of panoramic images, and spent more time than I care to remember back in the film days slicing and splicing together 4×6-inch prints with a razor blade and rubber cement, to make panoramas from sequences of individual shots. The Sony A33 and A55′s Sweep Panorama mode does all this for you inside the camera. Again taking advantage of Sony’s high-speed capture technology, Sweep Panorama collects dozens of individual images while you hold down the shutter button and "sweep" the camera from side to side or up and down. The powerful Bionz image-processing engine examines all these images, takes slices from each, applies geometric and tonal corrections to each slice, and then stitches them together into a single panoramic image. The results are stunning, and experimenting is loads of fun.

I like the idea, but you don’t need a 3D printer for this. Just use conductive strips or good ol’ fashioned wire.

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.

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.

Once upon a time, must have been 13 or 14 at the time, was doing the annual find the blown bulb in the christmas tree lights. Must have completed said mission and marvelled how the bit of cable at the middle/end of the lights was hidden within insulation tape (lights must have been 20 or so years old, this was in the 90s) and the curious being that I am thought let’s see what the tapes hiding – obviously bare wires.

I’m wondering why nobody is simply rectifying a 120vac input for dc wiring the secondary coil? It means you don’t have to swap the coil location or use a dc power supply. I have a trans with a secondary resistance of 82ohms. Putting 120vdc through it would be about 175watts (assuming I do a good job of determining wire size and 1.46amps is ok)

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…

We were pretty close to that 40% rule when our controllers started to fail, which is probably why they only started failing after our customers had use the controllers a few times. We were pushing 22 Amps through 40 Amp rated parts. In other words, using a component at half its rating still won’t cover for substandard parts! Our solution was to find a part that was manufactured to spec and also use the component at half its rating and we’ve not had a verified SSR related failure since.

Europe is a real patchwork of degrees of sketchy. German wiring standards are very high indeed, at least in the semi-industrial places (laboratories, hospitals) I worked. The real Schuko plug/socket design is quite nice and safe, and hard to find *not* implemented correctly in Germany. Other countries, not so much. And don’t get me started on English and South African wiring and plugs.

Even with a large heat sink like that, shrink it to 50mmx100mm and the datasheet lists a max of 10A. With that aluminum plate, I’d be surprised if it could handle more than 5A for a length of time.

But saws only bite in one direction, which is why the working stroke has to be in phase. Doesn’t matter which way the dudes are facing, they have to apply force to it in the same direction at the same time, and the other stroke is just returning back to starting point.

I would prefer, use a circuit (SCR?) to lower the voltage to around a safer value, where we won’t have any problem in the worse case.