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In case you hadn’t noticed, 2010 is the Year of 3D in the HDTV space, and all the television makers are rushing to add 3D capability across their product lines. Sony has come up with a clever way of capturing 3D images using the same "sweep" technology as in their normal 2D panoramas. As the camera is swept across a scene, it will naturally see various parts of the subject from slightly different angles at different points along its sweep. Sony’s engineers have taken advantage of this to add a 3D Sweep Panorama mode to a number of their cameras, the A33 and A55 included. While the 3D data is apparently stored in a fairly standard file format, viewing the 3D images currently requires connecting the camera’s HDMI output to a Sony 3D-capable television set. Sony’s promised 3D Sweep Panorama playback support for their PS3 game consoles, supposedly coming as early as this September. That’s still a bit limiting, but hopefully as 3D technology matures, various manufacturers will be able to read each others’ 3D formats.

If you had a mains-voltage shock once and got away with it, you were lucky, that doesn’t mean the voltage is safe, you were merely playing a game of Russian Roulette with Ohm’s Law and a low impedance high voltage supply. Your domestic mains can dump the hefty amounts of current your home heating, your cooker, or your electric kettle demands, so if it finds a low resistance path through you then it is going have no problems dumping whatever current Ohm’s Law allows it to through that path. The chances are if it happens to you the path will be a high enough resistance that you’ll only get a very nasty jolt and live to tell the tale, but if it’s not your lucky day the resistance will be low enough that you’re just going to sit on the end of it twitching until the power is turned off, whether you’re alive or not. That’s the gruesome truth. Mess with this stuff and you can die, end of story. You are responsible for keeping yourself safe, and this is not a joke. OK? Now to work!

That’ what I was thing one simple resign feature could make it as safe as most electrical appliances. Assuming heating element isn’t subject to contact. For me the phonographs weren’t clear in that regard. .

“If you can power the logic side with some +5V derived from mains, there is no point keeping the optocouplers, right?”

So China are stuck before capitalism’s stable period, the West are now past that. China might end up passing through it, or skipping it altogether. Actually the West might end up learning a few tricks from them.

my first “real” job was in a video game arcade back in the 80’s my boss was a really cheap prick that used to buy asian cocktail machines that were “native” 110V, with a 240V to 110V step down transformer wedged in where it would fit, my second day I was fishing out a 20 cent coin that had missed the coin box, I got “zapped” hard enough to blow my finger nail in half and stop my heart.

That said, 12A @ 240V is only a little less than the most our Volt will use even on a proper charger, so it’s still a good thing.

Thanks again to the relatively short stature of the Sony A33, the remainder of the rear-panel controls are rather difficult to reach when shooting single-handed, even with the relatively light kit lens attached. There are only a few buttons, Function, Playback, and Delete, plus a four-way controller with a central OK button. This isn’t an issue if shooting two-handed, but you do have to change your grip fairly substantially to reach any further than the top quadrant of the four-way controller. With real-estate at a premium, Sony has only provided markings on the controller for the alternate functions offered during shooting (and in the case of the Up / Display button, during playback).

In air conditioning, we are given a gift by equipment manufacturers on the equipment data tags: the minimum circuit ampacity (MCA) and MOCP or max fuse/max circuit breaker rating.

Heat is a result of the friction of electron flow. Half the current at double the voltage should result in roughly half the heat if using the same size wire. It’s why our grid transmits at 100k volt over long distances.

Of course you can use an extra 50Hz transformer, you do not need voltage regulation. But you need power (DC) for motors and electronics. If you have already a switching PSU (which are often even cheaper than big heavy iron/copper transformers of the same power) the extra power capability for the heater does not cost very much. Lets say you will not get the 120VA transformer for the price difference of lets say a 80W PSU vs. a 200W PSU. Also you can switch the DC with a single MOSFET.

They’ve lifted 200kg so far, and it looks like a pretty cool addition to a shop already packed with other builds, like their MOT spot welder and a propane tank sandblaster.