AEDs? As in Adhesive Explosive Devices?!? Hey, don’t come any closer! You keep that thing away from me, you hear?!?
Samsung is rolling out an update for its 2018 lineup of QLED TVs that enables FreeSync, which allows for smoother gaming without screen tearing. The company talked up its partnership with Microsoft’s Xbox division during its unveiling of this year’s sets, and this is yet another feature that embraces the capabilities of the Xbox One X.
Called the MPSMv2, the core of the project is the ESP8266 module. The dev board itself can support anything with GPIO pins, whether it’s an Arudino, Raspberry Pi, or anything else with those features. Flashing the NodeMCU firmware is pretty much all that needs to be done in order to get the device up and running, and once you get the device connected to your WiFi you’ll be able to control whatever appliances you want.
Lenovo’s previous ARM-powered device was a 2-in-1 detachable tablet / laptop hybrid, but the new Yoga C630 is more like a traditional laptop that also flips over to become a tablet in the traditional Yoga style. Because it’s more of a clamshell-like laptop, you also get a polished aluminum design, and the build quality you’d expect from a laptop. Lenovo is equipping the Yoga C630 with a 13.3-inch FHD IPS touchscreen that also supports an optional stylus. There’s 4GB or 8GB of RAM, and 128GB or 256GB of storage. Ports include two USB-C and a headphone jack.
Before we dig in, know that the Amazon Smart Plug is designed for use with a 100-120 volt three prong system so it’s a North American product only.
The leads on that TO220 case SCR and that solder trace are not going to handle 20 amps continuously without heating up. A SCR that’s up to the task of carrying 20 amps for hours on end would have a TO-218 case or even be stud mount. If all else fails you could just use a contactor relay which is what they normally use for this application.
I recall doing the exact same as a kid when in france, on holiday. The french also have those so seductive to interested kids 2-Prong plugs with a gap of ‘just’ that size….
On the Sony A33 and A55, the EVF can serve as both shooting and playback display. As mentioned earlier, the ability to check your shots and make camera settings without taking your eye from the eyepiece leads to a slightly different and more efficient shooting style; one that encourages you to learn the camera by feel and memory, rather than looking at the controls as you press them. I’ve only had a few days with the camera as of this writing, but can see that greater familiarity will produce a very efficient shooting style.
The new CMOS image sensor in the Sony A33 features on-chip column A/D conversion, which helps increase readout speed. It also includes the same on-chip analog and digital noise reduction that featured previously in the Sony A900. The Sony A33 also sports an updated BIONZ image processor, with reworked algorithms to allow its signature high-speed burst shooting, plus digital compositing and Full HD movie recording. The Sony Alpha A33 offers sensitivities ranging from ISO 100 to 12,800 equivalents, and can automatically select an ISO sensitivity between ISO 100 and 1,600 equivalents.
It’s good to see a snubber on the design (that’s often omitted on DIY designs I’ve seen). There are a few TRIACs that are designed to commute highly-inductive loads (“snubberless” is the marketing term I’ve seen) — may worth looking into them to reduce the BOM.
In the old days, waaay back in the 20th Century, you’d buy something from a vendor that had a good reputation. It was in their interest to keep their reputation, because that’s where customers came from, so they’d make sure to only buy their materials and parts from reputable suppliers. And they’d do the same, forming a chain of reliability and trust built up through experience and everyone’s mutual need to keep up a reputation.
A hobbyist should not screw with a Triac on house wiring if it will be “permanently” installed in a junction box. Make an adapter that plugs into a socket on the outside so that it is clear it is not a normal outlet. If you have to homebrew something like this use a good relay or contactor with a UR approval. AND read the spec on it thoroughly.
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