BMW’s iX3 is the company’s first normal-looking all-electric car | Lrd12 Overload Relay

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.

仲鑫达倡导“勤奋、求实、开拓、发展”的企业精神，在企业内部构建积极向上、团结协作、创新进取的企业文化和人才环境。

Level 2 charging systems come in two basic varieties, plug-in portable and wall-mounted units that are hard-wired directly to a home’s electric service. If you don’t have a closed garage and you’ll be charging the vehicle outside, local codes may require a fixed-mount unit. Otherwise a portable charger requires no professional installation, assuming you’ve added the 240-volt service line. This type can come in handy if you own two homes or will be staying with friends or family in another town and want to take the unit along for charging at your destination.

There are numerous safe ways to do this, without reinventing the wheel. Like so: http://www.omega.com/pptst/HCS_HEATER.html (Need 240 mains? Hook two in series.) Precision control circuit can be found in the Data sheet for LM34 temp sensor. Uses an LM10 combo op-amp/ref to switch a solid state relay. Doc

I’m constantly amazed by the use of a giant blob of solder to increase the cross section of PCB traces meant to increase their current carrying capability.

In this case, multiply the number of times you charged the car by 8.9 kWh for a low estimate of electric power consumed. For a better estimate, you need to know what the battery charging losses are. It takes more than 8.9 kWh to charge an 8.9 kWh battery – some of the power gets lost to heat. I can’t find authoritative data, but posters on Tesla forums claiming to have measured this report losses between 10 and 20%. If you assume it’s 15%, then it’ll take 8.9 / (1 – .15) = 10.5 kWh to charge the Niro’s battery.

I’ve paid 18’000.- CHF in Switzerland back in 2017 for a 9.3kW roof top installation and I’ve gotten 5’580.- CHF back from the Swiss government in cash. That’s like 13 cents per watt installed

You are correct and if you design this type of solution you already know this. With PCB design, the alternatives are heavier copper, wider traces, plating up copper in the areas that carry heavy current or a combo of any of the three. But you can only go so far with these solutions. Hack apart a known good SSR and I bet they use the exact same solution.

Bryan Orr is an HVAC and electrical contractor in Orlando, Florida. He is the founder of HVACRSchool.com and the HVAC School Podcast. He has been involved in technician training for 15 years. 

Sweep Panorama mode makes shooting panoramas easy, but not entirely brainless: It often takes me a few tries to get just the shot I want. The camera throws away a fair bit of the image area top/bottom and left/right, to insure that it has enough room to get everything aligned properly, despite your having angled the camera or not having swept perfectly horizontally or vertically. Sometimes, you can end up with your main subject higher or lower in the frame than you’d anticipated. It’s also easy to get a tilted horizon, if the camera orientation or your sweep direction is a little off. I found the A33 and A55′s level indicator and viewfinder gridline displays very helpful for avoiding these problems, although there was a little learning curve for me to make effective use of them.

What’s the big deal? The heated rock for my herpetarium plugs directly into the wall. Nice cozy and warm. No shocks for me, no limp lizard either.

The Sony A33 offers a lot of control for shooting contrasty subjects. Dynamic Range Optimizer (DRO) adjusts contrast and brightness to optimize the camera’s use of available dynamic range. Auto HDR modes use three quick shots to cover an amazing tonal range. (The shot on the right represents the maximum range of 6 EV.)