Not by itself. While there are FETs that size with very low Rdson values and peak current ratings well over 100A, those are really meant for switching circuits (like SMPSs), and still you have to account for heat dissipation. So you have to add some hefty heatsinks, depending on how much current they'll pass and for how long. So for a starter motor, when you take into account the peak expected operating temperature (150F+), how long you might be cranking worst-case (perhaps 30-60s for some idiot who won't give up), derating for reliability, etc., you're probably looking at an array of such FETs and a big-ass heatsink on top of them.
But for an assist motor for a bike, you're right, you can use FETs like that. But there's still more to the motor control circuit than that (remember, we want regen here), and it'll take up some space, and the circuit will certainly have to be custom since it's unlikely anyone has made a handy ASIC to do this job. It's doable though; it'd help if you got one of those bikes that has the really thick hollow aerodynamic tubes, rather than the regular old circular steel tubes that were an inch wide or less.
That's because they have a taxation system that's the opposite of ours: you get taxed more the older your car is, and past 5 years it's prohibitively expensive so you might as well just buy a new car. This is the opposite of what we do in the US, where you get taxed based on the blue-book value of the car, so the older your car is, the cheaper it is (assuming you live in a state where there's a personal property tax ("car tax") or a registration fee that's based on the car's value).
It's not *that* bad for the Japanese though: they export all their used cars to the rest of Asia and resell them.
Actually, at least on some phones, including my Galaxy S4, the USB jack *is* user-replaceable (sorta): it's on a separate PCB mostly by itself, and you can buy replacements on Ebay pretty cheap. Of course, you have to disassemble the phone a lot to replace it, but it is something that someone can do at home with a micro screwdriver set.
I wonder if anyone would want to make replacement boards with USB-c connectors instead, since those are probably better than the crappy microUSB ones,
I wonder if anyone's though of making and selling better-quality rails/tensioners to replace the inadequately-specced ones. Or is it too expensive to do the labor needed to install them?
Pretty much. However, I would like to point out that one big problem I see on smartphones is the shitty software. After a few years, the phone gets ridiculously slow and pretty much unusable because the software has gotten so bad (or infected, it's hard to know really since it's all closed-source).
I would have hung onto my old HTC phone for longer if it hadn't gotten so slow. But instead of futzing around with some unsupported and ancient build of CyanogenMod, it was a lot easier to just buy a newer phone.
It's not that different with PCs: a lot of people still buy new computers (though not as much as years ago) simply because the software had gone bad. So instead of re-installing Windows, they'd go buy a whole new computer.
This is really pretty shameful, considering how easy it is to update software, but it's not in the manufacturers' interest to support software very well because it'll just slow sales.
The problem, as I see it, is that manufacturers may *think* that circling wagons around what MS wants will maximize their profits, but I think they're terribly mistaken. Just look at how badly the PC market is doing these days. No one's buying the things any more, unless they're basically forced to because their old PC died of old age. The market is saturated, and people are moving to mobile devices which don't have all the problems that Windows has. PC makers would do better if they pushed devices with different OSes; remember when netbooks were brand-new, they were selling pretty well with Linux, until MS screwed them over by requiring netbook makers to only sell them with Windows, killing the netbook market altogether, and creating a market which the iPad and later Android tablets exploited.
Even worse, now MS is starting to make their own hardware (the Surface line), which threatens to put some of the other OEMs out of business.
Linux *is* using it wrong, and it's unfixable, because the only "right" way to use it is to use Windows on it, because that's what the consortium intended.
Pretty lousy when a cabal of companies conspire to only support a monopoly in operating systems. You'd think they'd want more competition in that market; it doesn't do hardware makers any good to have all their wagons hitched to a single OS maker that's liable to lead them off a cliff (look at how unpopular Windows is these days).
Sorry, no. The motor needed to provide useful assist to a human rider on a bicycle is going to be much larger than something for a 4oz drone. Correspondingly, the motor controller is going to be much larger too: power transistors for high-current applications are much bigger than for low-power ones. And finally, drones don't need to do regeneration; there's no reason for that in the air. We're talking about regen here. And regen requires 1) an even more complicated controller, and 2) a storage device (battery). I guess you could get some Li-ion AA-size batteries like Tesla uses and stick them inside one or two bike tubes, but that's still not that much capacity. Don't forget you still need room inside those tubes for the shifting and brake cables (you can't move them outside the tubes because that'll make it obvious to the judges).
Sorry, I don't get it. By all accounts, their hardware (provided it's not counterfeit) is very good. Their software is malware (if you have counterfeit hardware). So, don't use their software. Problem solved. This simply isn't a problem in the Linux world.
I guess you could make the argument that their hardware is far more likely to be counterfeit than some competitor's.
What's wrong with FTDIs? Obviously, on Windows they're a problem because their driver is malware, but this isn't the case on Linux, since FTDI doesn't make the Linux driver for their chip. So why should Arduino care about this issue? Arduinos don't run Windows.
Brushless DC motors *are* complex motors. The motor itself isn't that complex (though for high power density you need very expensive magnets), but the controller is. And a bicycle doesn't give you much room to fit some complex electronic circuitry, *especially* if you're trying to hide it from the judges!
E.g., you can't label a product as containing GMO anything, because customers might not want it! How in the bloody hell is that 'free market'?
This is why it's actually a religion. It's no different than any other religion: make up a belief system that involves believing in some wild-ass idea, and defend it to the death even though you have no real evidence to support it at all, and any reasonable person not invested in this belief system can easily see and point out that it's a bunch of bunk.
I applaud Microsoft for cramming their current phones full of bloatware. The WP fans need to learn firsthand, the hard way, why they were stupid to ever trust MS.
No, he's almost certainly not. He's probably a very typical American. About 50% of America's population supports the people holed up in that wildlife preserve.
The thing that killed Nokia was the rise of the smartphone, which they totally missed the boat on. That was their first mistake, sticking with crappy Symbian when everyone really wanted an iOS/Android phone.
Their next mistake was trying to jump on the smartphone bandwagon by tying their fortunes to Microsoft. No one wanted a Windows phone, and they still don't.
What they should have done is gone with Android, the sooner the better. Obviously, iOS wasn't an option since Apple controls all that, but Android was the obvious choice. They probably avoided it because they didn't want to be a "me too" Android player, but being a strong Android player is better than selling a tiny number of Windows phones. They could have phased out their Symbian phones while increasing their Android investment, and then maybe simultaneously worked on their own OS, sorta like Blackberry, attempting to be Android compatible (for the apps) while using the same hardware.
There's a bit of a difference between a motorcycle rider and an emphysema patient. Lots of motorcyclists ride their whole lives without any accidents; it's a rare occurrence, though obviously they tend to be hurt much worse than people in cars when it does happen. They're not actively inviting injury, unless they're obviously reckless (which most aren't). You could say the exact same thing about anyone who rides in a car, train, airplane, or bus in fact: it's possible they'll be involved in a crash and hurt or killed. Same for bicyclists. Same for pedestrians. Just walking up or down stairs can get you injured. But we do all these things because the risk is worth it; no one wants to sit in a bubble and never leave their house, and society wouldn't function if people didn't go out and do stuff.
Smoking isn't the same thing: it's entirely unnecessary, has no benefits whatsoever, and only causes injury. If they're willing to quit, then fine, but if they're not, why bother helping them? If someone gets a knife and chops off their fingers, would you bother reattaching them if they tell you that they're going to just chop them off again as soon as you're done? Continuing to smoke after getting treatment for smoking-caused illness is no different.
So even if patient flat refuses to follow the doctor's advice, and does things the doctor **orders** them not to, which completely counteract the medical treatment they're being given, the doctors in Canada are obligated to keep trying to treat these uncooperative patients?
That seems like a major waste of time and money to me. Remember here, the doctors only get paid for treating patients; if they turn a patient away, that's money they're missing out on, but it's no different from refusing to serve a customer in some other business where the aggravation of dealing with a difficult customer isn't worth the money.
Sorry, but you'll have to explain exactly how that applies, especially when I know of real-life examples of doctors refusing to treat patients.
The HA prevents doctors from doing harm, it doesn't say that doctors have to cater to patients' whims. When a patient *refuses* to follow a doctor's advice to get better, then why should the doctor continue to waste effort treating them?
On what kind of car? Full coverage? What region, and how many miles per year?
Maybe you don't pay that much because you're 55+ and drive some 15-year-old beater 5000 miles/year. Someone younger with a new car and full coverage and a long commute is going to pay more.
Slashdot Mirror
Not by itself. While there are FETs that size with very low Rdson values and peak current ratings well over 100A, those are really meant for switching circuits (like SMPSs), and still you have to account for heat dissipation. So you have to add some hefty heatsinks, depending on how much current they'll pass and for how long. So for a starter motor, when you take into account the peak expected operating temperature (150F+), how long you might be cranking worst-case (perhaps 30-60s for some idiot who won't give up), derating for reliability, etc., you're probably looking at an array of such FETs and a big-ass heatsink on top of them.
But for an assist motor for a bike, you're right, you can use FETs like that. But there's still more to the motor control circuit than that (remember, we want regen here), and it'll take up some space, and the circuit will certainly have to be custom since it's unlikely anyone has made a handy ASIC to do this job. It's doable though; it'd help if you got one of those bikes that has the really thick hollow aerodynamic tubes, rather than the regular old circular steel tubes that were an inch wide or less.
That's because they have a taxation system that's the opposite of ours: you get taxed more the older your car is, and past 5 years it's prohibitively expensive so you might as well just buy a new car. This is the opposite of what we do in the US, where you get taxed based on the blue-book value of the car, so the older your car is, the cheaper it is (assuming you live in a state where there's a personal property tax ("car tax") or a registration fee that's based on the car's value).
It's not *that* bad for the Japanese though: they export all their used cars to the rest of Asia and resell them.
Actually, at least on some phones, including my Galaxy S4, the USB jack *is* user-replaceable (sorta): it's on a separate PCB mostly by itself, and you can buy replacements on Ebay pretty cheap. Of course, you have to disassemble the phone a lot to replace it, but it is something that someone can do at home with a micro screwdriver set.
I wonder if anyone would want to make replacement boards with USB-c connectors instead, since those are probably better than the crappy microUSB ones,
I wonder if anyone's though of making and selling better-quality rails/tensioners to replace the inadequately-specced ones. Or is it too expensive to do the labor needed to install them?
Pretty much. However, I would like to point out that one big problem I see on smartphones is the shitty software. After a few years, the phone gets ridiculously slow and pretty much unusable because the software has gotten so bad (or infected, it's hard to know really since it's all closed-source).
I would have hung onto my old HTC phone for longer if it hadn't gotten so slow. But instead of futzing around with some unsupported and ancient build of CyanogenMod, it was a lot easier to just buy a newer phone.
It's not that different with PCs: a lot of people still buy new computers (though not as much as years ago) simply because the software had gone bad. So instead of re-installing Windows, they'd go buy a whole new computer.
This is really pretty shameful, considering how easy it is to update software, but it's not in the manufacturers' interest to support software very well because it'll just slow sales.
The problem, as I see it, is that manufacturers may *think* that circling wagons around what MS wants will maximize their profits, but I think they're terribly mistaken. Just look at how badly the PC market is doing these days. No one's buying the things any more, unless they're basically forced to because their old PC died of old age. The market is saturated, and people are moving to mobile devices which don't have all the problems that Windows has. PC makers would do better if they pushed devices with different OSes; remember when netbooks were brand-new, they were selling pretty well with Linux, until MS screwed them over by requiring netbook makers to only sell them with Windows, killing the netbook market altogether, and creating a market which the iPad and later Android tablets exploited.
Even worse, now MS is starting to make their own hardware (the Surface line), which threatens to put some of the other OEMs out of business.
Linux *is* using it wrong, and it's unfixable, because the only "right" way to use it is to use Windows on it, because that's what the consortium intended.
Pretty lousy when a cabal of companies conspire to only support a monopoly in operating systems. You'd think they'd want more competition in that market; it doesn't do hardware makers any good to have all their wagons hitched to a single OS maker that's liable to lead them off a cliff (look at how unpopular Windows is these days).
Sorry, no. The motor needed to provide useful assist to a human rider on a bicycle is going to be much larger than something for a 4oz drone. Correspondingly, the motor controller is going to be much larger too: power transistors for high-current applications are much bigger than for low-power ones. And finally, drones don't need to do regeneration; there's no reason for that in the air. We're talking about regen here. And regen requires 1) an even more complicated controller, and 2) a storage device (battery). I guess you could get some Li-ion AA-size batteries like Tesla uses and stick them inside one or two bike tubes, but that's still not that much capacity. Don't forget you still need room inside those tubes for the shifting and brake cables (you can't move them outside the tubes because that'll make it obvious to the judges).
That's a pretty good reason.
Sorry, I don't get it. By all accounts, their hardware (provided it's not counterfeit) is very good. Their software is malware (if you have counterfeit hardware). So, don't use their software. Problem solved. This simply isn't a problem in the Linux world.
I guess you could make the argument that their hardware is far more likely to be counterfeit than some competitor's.
What's wrong with FTDIs? Obviously, on Windows they're a problem because their driver is malware, but this isn't the case on Linux, since FTDI doesn't make the Linux driver for their chip. So why should Arduino care about this issue? Arduinos don't run Windows.
Brushless DC motors *are* complex motors. The motor itself isn't that complex (though for high power density you need very expensive magnets), but the controller is. And a bicycle doesn't give you much room to fit some complex electronic circuitry, *especially* if you're trying to hide it from the judges!
Unfortunately, in the United States, you can't put rich people in prison, especially if they're also famous.
FTFY.
E.g., you can't label a product as containing GMO anything, because customers might not want it! How in the bloody hell is that 'free market'?
This is why it's actually a religion. It's no different than any other religion: make up a belief system that involves believing in some wild-ass idea, and defend it to the death even though you have no real evidence to support it at all, and any reasonable person not invested in this belief system can easily see and point out that it's a bunch of bunk.
I applaud Microsoft for cramming their current phones full of bloatware. The WP fans need to learn firsthand, the hard way, why they were stupid to ever trust MS.
No, he's almost certainly not. He's probably a very typical American. About 50% of America's population supports the people holed up in that wildlife preserve.
That should be a worrying thought.
The thing that killed Nokia was the rise of the smartphone, which they totally missed the boat on. That was their first mistake, sticking with crappy Symbian when everyone really wanted an iOS/Android phone.
Their next mistake was trying to jump on the smartphone bandwagon by tying their fortunes to Microsoft. No one wanted a Windows phone, and they still don't.
What they should have done is gone with Android, the sooner the better. Obviously, iOS wasn't an option since Apple controls all that, but Android was the obvious choice. They probably avoided it because they didn't want to be a "me too" Android player, but being a strong Android player is better than selling a tiny number of Windows phones. They could have phased out their Symbian phones while increasing their Android investment, and then maybe simultaneously worked on their own OS, sorta like Blackberry, attempting to be Android compatible (for the apps) while using the same hardware.
There's a bit of a difference between a motorcycle rider and an emphysema patient. Lots of motorcyclists ride their whole lives without any accidents; it's a rare occurrence, though obviously they tend to be hurt much worse than people in cars when it does happen. They're not actively inviting injury, unless they're obviously reckless (which most aren't). You could say the exact same thing about anyone who rides in a car, train, airplane, or bus in fact: it's possible they'll be involved in a crash and hurt or killed. Same for bicyclists. Same for pedestrians. Just walking up or down stairs can get you injured. But we do all these things because the risk is worth it; no one wants to sit in a bubble and never leave their house, and society wouldn't function if people didn't go out and do stuff.
Smoking isn't the same thing: it's entirely unnecessary, has no benefits whatsoever, and only causes injury. If they're willing to quit, then fine, but if they're not, why bother helping them? If someone gets a knife and chops off their fingers, would you bother reattaching them if they tell you that they're going to just chop them off again as soon as you're done? Continuing to smoke after getting treatment for smoking-caused illness is no different.
(just open your mind man, the evidence is all out there but you have to find it yourself (for some reason)).
This is *exactly* what religionists say to me when I question their faith in something that has zero evidence.
So even if patient flat refuses to follow the doctor's advice, and does things the doctor **orders** them not to, which completely counteract the medical treatment they're being given, the doctors in Canada are obligated to keep trying to treat these uncooperative patients?
That seems like a major waste of time and money to me. Remember here, the doctors only get paid for treating patients; if they turn a patient away, that's money they're missing out on, but it's no different from refusing to serve a customer in some other business where the aggravation of dealing with a difficult customer isn't worth the money.
Why wouldn't they be? Being single definitely sucks if you like companionship, but it's a lot better than being stuck in a toxic relationship.
Yeah, but how does it actually work in universal healthcare systems? That's what I'm asking, not about theory.
Plus, if you have non-doctors overriding the medical opinions of real doctors, that sounds like a serious flaw in the implementation of a system.
Sorry, but you'll have to explain exactly how that applies, especially when I know of real-life examples of doctors refusing to treat patients.
The HA prevents doctors from doing harm, it doesn't say that doctors have to cater to patients' whims. When a patient *refuses* to follow a doctor's advice to get better, then why should the doctor continue to waste effort treating them?
Well given the huge surplus of single males in the Bay Area, I would imagine all the beautiful women there are taken.
On what kind of car? Full coverage? What region, and how many miles per year?
Maybe you don't pay that much because you're 55+ and drive some 15-year-old beater 5000 miles/year. Someone younger with a new car and full coverage and a long commute is going to pay more.