The Sony Alpha A33 lacks one feature found in the A55V (the only version of the A55 that’s sold in the US market) — a built-in GPS receiver. It’s still possible to geotag images and movies from the A33, but doing so will rely on an external GPS logging device and PC software that can backtrack to calculate the location at which images and movies were shot — not nearly as seamless a solution as the A55V’s ability to geotag images and movies straight out of the box.
Hopefully the era when people did industrial sourcing from an overgrown Beanie Baby marketplace will be looked back on by future generations, and they’ll laugh.
If a high-frequency current is large enough to be immediately painful, it’s large enough to immediately burn you, which is why hooking a tesla coil to a doorknob is rather dubious. It hurts, because it really hurts.
Oversizing switching gear is good to some point but instead of relay withstanding surges I would prefer breaker that would protect everything.
If you’re worried about activists using media to promote fear and doubt about science and medicine,you’re in the right place. At Science 2.0, scientists are the journalists. with no political bias or editorial control. But we can’t do it alone so please make a difference.
How about trying to say something accurate for a change? Almost everything you say lately is provably WRONG.
The very first point to make clear when writing an article like this one is that you should disregard any ideas of “safe” voltages or currents. While the story about some significant number of people who die every year from licking a 9-volt battery is probably an urban legend and you have little to worry about from low voltage equipment, it is best to look at any higher voltages as potentially dangerous and react accordingly.
This is a fantastic idea: a regular PCB, that gummy conformal coat over any solder joints, solder mask is fine for insulation if you space your traces correctly, and an SSR to turn it on or off. If you have a problem with the thing getting too hot, set a maximum with a variac on the input and you’ll get slower ramps at lower voltage but lower maxima. This is not unsafe, I would think it a fine idea, and I may have a different bed material in mind too.
I’d like to know how this does around town and also on the highway (independently) when the battery is exhausted. Maybe we should get standard EPA measurements with the battery starting empty in addition to the eMPG test.
Solar water heaters are nice. Sadly, when one gets far north, the sun isn’t a common sight during the cold parts of the year.
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