roundaboutnow

About

Username
roundaboutnow
Joined
Visits
324
Last Active
Roles
member
Points
1,389
Badges
1
Posts
770
  • EcoFlow Advanced Kit review: Power your whole house with batteries

    jingo said:
    I really don't want to be mean, but personally I think a journalist should understand enough about what he is writing so that it makes sense.

    This is one paragraph that particularly demonstrates the lack of understanding:

    "The Advanced Kit expands the kWh from 702 to 21.6. The battery holds 7,200W and can output up to 240V of power. This energy will give you up to one week of administrated power to your home."

    (1) "the kWh (is expanded) from 702 to 21.6". Really? Anyone can see that 21.6 is not an expansion of 702.

    (2) The battery holds 7,200W and can output up to 240V of power. 7,200W is not a capacity, it is a rate of consumption. Capacity is expressed in kWh, rate of consumption in kW. It's not completely wrong to say that 240v is a measure of power, but it's not strictly correct either. My guess from reading the article is that the capacity of one unit (not the "advanced kit") is 3,600Wh (3.6kWh) which is pretty weedy but would probably power a car for up to about one mile of use (at 3.5kWh/mile, say) disregarding any electrical losses.

    (3) "up to one week of administrated power" What does this mean? The length of time until the unit discharges is dependant on how fast the power is consumed. It might mean that its self-discharge rate is so high that after a week of it sitting there, whether used or not, the stored energy has all discharged. This statement needs to be explained.

    There are plenty of other unanswered questions here. Either the journalist needs to understand the subject better, or it needs to be edited by someone who does.
    I agree that the article is a bit confusing.

    W is a unit of power which does have a time or rate component, while W/hr is used for energy - either consumption as in how much energy your house or EV is using, or capacity, as in how much energy your battery can deliver.

    BTW, most EVs now can go about 4 miles/kWh, so 14 mi is possible on 3.5kWh.

    Voltage (V) all by itself is not an indication of power. Sometimes it is called "potential" because it is not until current (amperage or "A") flows that power is delivered. A higher voltage has a higher "potential" for power at any given current. This is basic Ohms law, where W=V*A 
    isidoreappleinsideruserjingo
  • Sketchy rumor suggests Apple Watch will be able to sync with Mac & iPad

    Xed said:
    petri said:
    Makes a lot of sense and it’s always seemed weird to me that the watch wasn’t linked up to all these things before anyway.

    I can control my phone music from my watch, that’s great, but why can’t I also control my iPad playback?  It has better speakers so I often use it as a portable music player, my watch can be used as a remote for Apple TV so why can’t it be a remote for my iPad?

    Theres a fitness app on my iPad already, why don’t I see any of my fitness data there?  It’s all in the cloud anyway, why do I have to dig my phone out of my pocket when the iPad is right there in front of me?

    Virtually everything else in the Apple ecosystem is synced across devices and just picks up right where you left off on whichever device… why was there ever this weird, artificial wall sealing in just the watch + iPhone? 
    Have you actually explored the Watch app on your iPhone? Can you imagine setting up an enter Watch with that small tech screen? I can, and it sounds like a miserable experience which is why I don't think we'll be seeing the Watch completely untethered from the iPhone. At best I think we can hope for making other devices conduits for the Watch.
    I agree using the small Watch screen for set up and configuration would not be great. All the more reason to have the option to use an iPad or Mac to configure and/or synch with the Watch.
    watto_cobra
  • Sketchy rumor suggests Apple Watch will be able to sync with Mac & iPad

    It may be a sketchy rumor, but it is not a sketchy idea.
    9secondkox2watto_cobra
  • Apple's mixed reality headset could be what the entire AR/VR market needs to succeed

    mjtomlin said:
    ...
    And to be at all successful, they'll need to offer different lens shapes and prescriptions.


    Different lens shapes make sense for stylistic reasons, but maybe various prescriptions could be handled if adaptive or otherwise adjustable optics are used. Something like this:
     https://www.deepoptics.com/

    The above technology is geared toward the multi-focal needs of presbyopia, but maybe any given prescription could be addressed with optics that allow a one-time initial calibration. (The latter would not need to be dynamically adjustable, but eye-tracking and distance ranging would probably need to be part of any AR system, so probably most of the parts will be there to handle presbyopia too).
    watto_cobra
  • Ron Howard's Imagine jumps ship from Apple TV+ to Amazon

    ronn said:
    Not surprised given Amazon's broader push into movies: buying MGM, bigger spend on cinema the last few years, and now reports of them moving into actual theatre ownership. They already highlighted plans to release 12-15 movies in theatres annually. Directors & Producers love that kind of thinking.
    Amazon does operate an actual theater in Culver City, CA. An existing theater was leased and was upgraded with several Samsung Onyx LED screens -- several 4K screens and one 8K screen:
    https://losangelestheatres.blogspot.com/2022/07/culver-city-12.html

    I attended a SMPTE screening of HDR content in that theater on the 40' wide 4K LED screen a few weeks ago. That was super impressive. 

    (Side note of interest: since the LED screen is solid, they can't put screen channel (L-C-R) speakers behind the screen. This was solved by placing smallish speaker arrays above the screen, a few meters away, then pointing them "backwards" onto the screen so the sound could bounce off the screen surface.)
    watto_cobra