When they got round to new meters here, I got an enormous credit. Evidently the old meter was ridiculously out of calibration and had been facilitating an overcharge for years.
And they told the truth? I just finished watching 2010 again, and my favorite line is when Dr. Chandra (played brilliantly by Bob Balaban) tells Hal that he (with the Discovery) may be destroyed.
"Thank you for telling me the truth."
And they told the truth? I just finished watching 2010 again, and my favorite line is when Dr. Chandra (played brilliantly by Bob Balaban) tells Hal that he (with the Discovery) may be destroyed.
"Thank you for telling me the truth."
This reads like a bunch of old farts complaining about the folly of cell phones 10 years ago. Of course its new and many big players are dumping buckets of cash into IoT and the stuff around it. When the cash cow for tech becomes a commodity the prices tank. Qualcomm can't compete in low cost hardware (cell phone chips) with Mediatek. Qualcomm needs to find a new high margin business to keep the lawyers busy. Same for Intel TI and the other players. The big winners now are the conference producers. $2K per attendee.
I know of several valid uses for IoT (can't share) but I do think it will become useful, it will just take a while.
I'm on my second "smart home" and I'm pretty familiar with the market drivers, which are very weak. There are gadget nuts who want the new cool stuff and tire quickly when it doesn't work as expected or is boring. There are folks who have been scared into heavy security and get the home automation stuff with it from the cable company. They finally realize that the bill is per node (ouch!).
I'm using it because setting timers is actually a PITA on the user hostile UI on most individual controls and the web interface is pretty easy and straightforward. Even the thermostat is harder to set up than the web interface.
I'm also using networked audio and it can work great. The multiroom stuff is for people who really want to live in hotels or hospitals. Its better now but still not easy for the first time user. I think even Sonos has discovered that most customers are single point audio users, except when impressing visitors. I do not get a degradation vs. a "local" digital source and its probably better since the busy stuff in the server is 3 rooms away.
I know of several valid uses for IoT (can't share) but I do think it will become useful, it will just take a while.
I'm on my second "smart home" and I'm pretty familiar with the market drivers, which are very weak. There are gadget nuts who want the new cool stuff and tire quickly when it doesn't work as expected or is boring. There are folks who have been scared into heavy security and get the home automation stuff with it from the cable company. They finally realize that the bill is per node (ouch!).
I'm using it because setting timers is actually a PITA on the user hostile UI on most individual controls and the web interface is pretty easy and straightforward. Even the thermostat is harder to set up than the web interface.
I'm also using networked audio and it can work great. The multiroom stuff is for people who really want to live in hotels or hospitals. Its better now but still not easy for the first time user. I think even Sonos has discovered that most customers are single point audio users, except when impressing visitors. I do not get a degradation vs. a "local" digital source and its probably better since the busy stuff in the server is 3 rooms away.
Happy to be an old fart here. One client says I'm the only person he knows without a smartphone.
There is one situation for which I've considered wireless: my cassette recorder/player in my bedroom would be nice to have in the living room, and it's difficult to run wires. But I can manage to listen in the bedroom. It's spoken word, not hi-fi.
Anyway in another thirty years or so it won't make any difference.
There is one situation for which I've considered wireless: my cassette recorder/player in my bedroom would be nice to have in the living room, and it's difficult to run wires. But I can manage to listen in the bedroom. It's spoken word, not hi-fi.
Anyway in another thirty years or so it won't make any difference.
Instead of fostering more meaningful communication , mobile phones have created
an army of connected zombies , and "distracted" use now exceeds intoxication
as the leading cause of accidents/death in the US.
Far from augmenting knowledge , it seems in the last 10 years the general
populous has become lazy , self absorbed , and stupid.
This seems to be proportional to widespread mobile use. The next level (IOT)
of automation will relieve the masses of any responsibilities , I just can't
imagine what they will end up doing with their gray matter.
VR would be the start of a "Matrix" - like dysfunctional culture. We just
are not evolving fast enough to keep up with IT - it will "swallow" us whole.
"path of least resistance" + IT = lazy + full corporate control.
OS
I have two homes (lucky me).... so, I have an UPS that keeps the computer server and internet modem et al running 24-7. I have several cameras that i can view in real time over the internet as a security system when away. No monthly payments. I also can monitor the inside temp at the Other home and change it if too cold or too hot. I turn on the heat or AC an hour before landing and enter a comfortable home. I added solar to the house and can monitor load/usage/cost via the internet/mobile phone. I dont know what else I will do but these are useful IoT for me. There are no medical uses so far.... pulse rate is worthless info. Accurate BP readings might be useful for some... and alarm/vibrate when too high.
Credit card elimination will be nice and probably more secure. It is no fun to have your card missing while on vacation or far away. Or left it somewhere. Waiting for replacement. Cant buy on credit for awhile (no mileage points
) . Or trying to pay for hotel you stayed at and your card gets blocked while in another country.... even though you called the card company to tell them not to block it in this or that country. Still gets blocked. No more card copying/forgery of cards. Or just plan stolen card/number. All can be eliminated by using finger print/eye scanning/voice recognition combo.
THx-RNMarsh
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Those all like standard telemetry use cases that we have been able to since before IoT created. And none of which require a central cloud slurp of your data. And as point to point apps (you to home) they are good use cases. Adding IoT to them gives you zero benefits.
You want a Jarvis in your house which only you can talk to. Most actually want that.
And herein is the key issue. In the goldrush for either data to sell or ongoing service revenue everyone is busy developing their own web UI or joining one of the 12 odd 'consortia' who are duking it out to be the gorilla. Result is no focus on the customer, poor business models, lax security and making mistakes that were already made 20+ years ago. If you are lucky you can find all the bit from one system. If you are clever you can link them yourself.
What you want is to buy a widget, own the widget and control the widget. simples. There needs to be a compelling reason to become a data source, and I don't see one.
I give SigFox a year before they die. Shame as they had good tech, but they are fighting telcos...and will lose.
Sigfox has nothing like the coverage that they claim,even in France... And it's expensive -- data costs more than cellular. We evaluated it for some apps, but it's just not ready.
It has some potential uses, if they roll it out. Arquiva, the UK provider, are slowly backpedalling....
I could bore you for hours, having been involved in the whole smart metering fiasco since day one. The real numbers are ... different. Dealing with the vested interests of the PES, and the bigger meter makers, and DECC has been kafka-esque to say the least. The solution is a real horse designed by a committee...
With their original cost model they would have worked. Arqiva x10 the cost when they licensed it which made it immediately not competitive other than battery life.
Ultra narrow band tech is useful and we could all use a cheap ubiquitous network. Of course APRS was doing it (cough) years ago. Let's see how much the telcos mess up NB-IoT.
Can you give a circuit ?.
So, what about a series resonant filter with high quality (low parasitics) L and C......for 110V/230V line level gear the values are doable.
A zobel on the equipment side would take care of load generated junk ?.
Has anybody had a look at what is happening below 50Hz/60Hz ?...is there anything there ?.
How much damage does AC power series resistance cause......ie low value series resistors as part of AC input power filtering module ?.
Dan.
Max, there are many variations on a symmetrical line filter, each with its own pros and cons. (Too) many end up making the audio gear sound congested and lacking in dynamics, so important to true high quality sound. Once that happens, it makes no difference how well it filers, the damange has been done. This is one of the reasons why I keep saying - if you can't try it out at your home, don't buy it.
Over time, I tried out several variations of my filter, to make sure it doesn't interfere with the dynamics, and again, several versions were rejected as unacceptable, even if their actual filtering effect was good and someties better than what I have now. I feel the price for that was unacceptable. To anyone testing their own filter, this I think should be of prime concern. In which case, it is this criterium which defines the ultimate schematic. This si something quite different from book definitions, it's something you have to listen for. I found that for me, no series resistor as a part of the AC unput does the trick just CLCLC elements, some doubled in parallel usually sounds better.
Over time, I tried out several variations of my filter, to make sure it doesn't interfere with the dynamics, and again, several versions were rejected as unacceptable, even if their actual filtering effect was good and someties better than what I have now. I feel the price for that was unacceptable. To anyone testing their own filter, this I think should be of prime concern. In which case, it is this criterium which defines the ultimate schematic. This si something quite different from book definitions, it's something you have to listen for. I found that for me, no series resistor as a part of the AC unput does the trick just CLCLC elements, some doubled in parallel usually sounds better.
Hi.
Hmmm, that amount of variability is a concern.
Wall power is an unbalanced system...why insert Neutral line series inductance (symmetrical filter) actually.....it is in fact an earth connection in MEN power distribution.
Load device internal Neutral wire series inductance will cause more PE noise currents due to any parasitics within in the 'black box'...eg, power transformer parasitic capacitance to frame, Y caps etc.
I'm thinking a suitably current capable (low parasitic series resistance/high q) series resonant LC with suitable loadside network ought to be subjectively 'invisible' and do the normal thing of keeping the HF junk out, and internally generated junk in, zobel dissipated.
Another interesting thing maybe, is that the series C will keep low frequency junk out too......is there 1/f noise in AC power lol.
When I hear loss/change in perceived dynamics with system change, I usually find that the change is due to reduction/change of system distortions and noises presenting as 'false' instantaneous and passage dynamics.
Ime as a system gets quieter (junk of all kinds, eg dc power supplies noise, thd, the jitter sources ie pim, excess noise, 1/f etc) it might well be less 'exciting' in the shorter term, but the increased clarity and resolution soon translates to increased sense of instantaneous dynamics and increased precision in MS imaging and depth imaging including 3D.
Timbre and sense of rhythm and ambience also become correct...loud sounds and vocals sound right, and really low level content sounds correct and intelligible/recognisable also.
This adds up to a system that is way more fun, musical and live/alive.
So, if a system suffers with your filters, is it actually deficiencies in the system that cause the disappointment...ie changed system PE currents causing changed audible artifacts ?.
Or, is the signature of the system not playing nice with the signature of your filter....iirc you mentioned iron powder L, what kind of caps ?.
Dan.
Dan, that's like asking me why do an amp and a CD player combo A play better music than set B, when in gact both consist of similar parts.
Regarding caps, I tried as many variatuins as I could think of. I found tat with X25 type caps I got the poor brother sound, strictly as per power regulations. After much try-and-listen combinations, I settled for Wima MKS and MKP caps, however rated for 630 AC/400 DC voltages and, as I found out, by doubling in parallel of input side for (100//100 nF)-> 2.7 mH -> (680//680 nF) -> 2,7 mH -> (100//100 nF). The sintered inductor rings are rated at 12A, however they can take the full load as is, while first saturation funnies begin to appear at roughly 16A. Therefore, the actual usable power is above 12A at 240 VAC, and according to EU directions the filter, as a domestic device, must be fuse protected by 10A fuse. This gives the filter an effective power handling of over 2,200 VA. Not many devices which might want to draw that much, hence no compression effects to hear.
Also, a somewhat forgotten oint. My approach is a parallel multiflter on, meaning that each device connected is not only protected from the power grid noise and disturbance, as is the case with eacg and every filter, but laso from inteference from any other device in the system, which most other firlters do not do. In other words, my biggest model has 6 parallel filters, each protecting every device both from the grid AND from its neighboring devices. Total protection, you might say.
As for variable results, true, a part of it is indeed a result of electrical interface between the filters and user devices, but also due to subjective reasons I cannot control. Some peope simply receive celaner power than other people, so there's more to be removed in one place than in another. If you live in a city, with literally millions of power grid connections preceeding yours, there will naturally be more inteference than if you live in some suburb with very few users between you and the local distribution transformer.
Most TV sets when connected to the filter will "lose" a lot of pretuned stations. Actually, they are not lost, only shfted, Their pretuning uncludes automatic AFC which of course compensates for tuning with the original signal which includes hash, and not the has is gone, the AFC simply overcompensates. You simply need to slightly retune, everything is there, it is now simply being overcompensated.
Regarding caps, I tried as many variatuins as I could think of. I found tat with X25 type caps I got the poor brother sound, strictly as per power regulations. After much try-and-listen combinations, I settled for Wima MKS and MKP caps, however rated for 630 AC/400 DC voltages and, as I found out, by doubling in parallel of input side for (100//100 nF)-> 2.7 mH -> (680//680 nF) -> 2,7 mH -> (100//100 nF). The sintered inductor rings are rated at 12A, however they can take the full load as is, while first saturation funnies begin to appear at roughly 16A. Therefore, the actual usable power is above 12A at 240 VAC, and according to EU directions the filter, as a domestic device, must be fuse protected by 10A fuse. This gives the filter an effective power handling of over 2,200 VA. Not many devices which might want to draw that much, hence no compression effects to hear.
Also, a somewhat forgotten oint. My approach is a parallel multiflter on, meaning that each device connected is not only protected from the power grid noise and disturbance, as is the case with eacg and every filter, but laso from inteference from any other device in the system, which most other firlters do not do. In other words, my biggest model has 6 parallel filters, each protecting every device both from the grid AND from its neighboring devices. Total protection, you might say.
As for variable results, true, a part of it is indeed a result of electrical interface between the filters and user devices, but also due to subjective reasons I cannot control. Some peope simply receive celaner power than other people, so there's more to be removed in one place than in another. If you live in a city, with literally millions of power grid connections preceeding yours, there will naturally be more inteference than if you live in some suburb with very few users between you and the local distribution transformer.
Most TV sets when connected to the filter will "lose" a lot of pretuned stations. Actually, they are not lost, only shfted, Their pretuning uncludes automatic AFC which of course compensates for tuning with the original signal which includes hash, and not the has is gone, the AFC simply overcompensates. You simply need to slightly retune, everything is there, it is now simply being overcompensated.
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