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I get called in all the time for problems with space heaters. If you leave the house while the heater is running, the connection could get loose and burn up the plug, which could start a fire. Give your space heater the space it needs, and turn it off when you aren’t using it. Learn more about how to use a space heater safely.
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.
Movie mode. The Sony A33 offers high definition interlaced video capture at up to 1,920 x 1,080 pixel resolution, commonly known as "Full HD" or "1080i." While Full HD videos are recorded using 59.94i or 50i interlaced field rates, the actual sensor data is clocked off at a frame rate of 29.97 or 25 frames per second. Using the non-standard 1,440 x 1,080 and standard definition VGA 640 x 480 pixel modes, progressive scan videos are created, matching the same actual sensor frame rates. One quirk of the A33′s design is that when shooting VGA videos, the focal length crop is increased just slightly, yielding a video feed that appears to have been shot with a more powerful telephoto lens (and in the process, making wide-angle video harder to achieve). The closely related A55 model doesn’t share this feature, which we’d speculate is likely due to some limitation as to how data can be most efficiently clocked off the CMOS image sensor in video mode.
I’ve used 220V heaters to cook meat and I survived (quite well fed) up until now. I suppose heating a piece of plastic can’t be that much more difficult, although wh
Matt Reed, the Creative Technologist at redpepper who shepherded the project, explained via email: “I got all of the Waldo training images from Google Image Search; 62 distinct Waldo heads and 45 Waldo heads plus body. I thought that wouldn’t be enough data to build a strong model but it gives surprisingly good predictions on Waldos that weren’t in the original training set.” Reed was inspired by Amazon Rekognition’s ability to recognize celebrities, and wanted to experiment on a similar system which supported cartoons. He had no prior experience with AutoML, and it took him about a week to code the robot in Python.
99% of the time you can’t even begin to sue because fakes were often dumped and mixed in throughout the supply lines so it’s nearly impossible to track it back to the factory that made the fake. And even if you could find the original factory, international lawsuit rarely works out.
I don’t know if the heat is high enough but mirror heating pads can be quite small and put under a sheet of glass would be quite effective.
But I don’t like the mains powered heater in this case: If you take 120W @24V its just 5A. No problem for a switching transistor or wires with 0,5mm² and you keep the mains voltage in the PSU box. Which I prefer in this case. Mains rated cabling (230V here in Europe) are not thinner and need thicker insulation. In the worst case you have to have PE connection to any metal part of the construction.
That said. We routinely use run of the mill power resistors in the aluminum heatsinked package, you know the ones, they start with the letter “D”, as heaters. Ohms law doesn’t fucking care if it’s DC or AC, but a little RMS will explain that DC will do the same amount of work at a lower voltage. It doesn’t fucking matter because you can choose another resistor value and get the same thing with AC. A cheap temperature controller and a relay will suffice if you have enough thermal mass to average the temperature.
It’s not that simple according to National Electrical Code (NEC) NFPA 70 for several reasons. Here are some additional factors to be considered:
Would that have ever been considered good wiring practice, or is it just the sort of short-cut that would have been done at some point?
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