>The nature of a circle means that adding 1cm to a 2m turbine blade increases the catchable wind by almost half (4.52sq m compared to 3.14), while removing 1cm reduces the harvested wind by half a square metre
Not the circles I am picturing...
Despite regular headlines about self-powered gadgets and a deluge of stories claiming that any day now we should expect our smart phones to start gathering power from the environment around us, the promise of harvested energy always seems just out of reach. Or is it? We may not be charging our gadgets in our Wellington boots …
Using pH? that makes it a battery. And the type of nail can cause damage to the tree.
More likely the power would be from the static differential between the ground and how high the wire goes... very much like a lightning rod.
Which reminds me of an old technology - put an array of lightning rods on a roof, with a suitable ground, and you can extract about .25 horsepower using an electrostatic motor.
You DO really really NEED a lightning arrest spark gap just in case the array gets hit by lightning... :)
I live in Bristol where the local council has been working tirelessly to turn traffic management into a parking issue. They believe that by making cars go really slow they can get to the point traffic is practically classed as parked and therefore perfectly managed.
With that in mind, a sleeping policeman with an hydraulically affected piezoelectric module could see Bristol supplying 95% of the Uk's power needs, whilst still continuing the council's policy of slapping the motorist around the head with a wet fish.
"I live in Bristol where the local council has been working tirelessly to turn traffic management into a parking issue. They believe that by making cars go really slow they can get to the point traffic is practically classed as parked and therefore
perfectly managed can be fined for being parked illegally."
That's not strictly true. "Improvements" in semiconductor technology over the years has not lead directly to lower power devices.
The amount of additional techniques that had to be applied to circuits (Multi-voltage, power switching etc) specifically due to the high leakage of certain technology nodes needed a massive investment and changes in design approach.
Recently mitigated by introduction of FinFET style transistors but never-the-less still meaning that power needs to be managed, not just by transitioning from one node to the next.
Looks like the IoT is splitting into two strands: "The Internet of Useful Things" such as the vibration sensors mentioned in the article and other stuff that's just intended to monetise information generated by people (AKA advertising); I hereby christen this the "Internet of Shit" as we'll be drowning in it soon.
@Mr Blowhard - Actually you can note very easily the difference between "Internet of Useful Things" and the "Internet of Shit":
The "Internet of Useful Things" is NOT really an internet, more like a domain-specific Intranet that has no reason to be connected to the rest of the Internet.
The "Internet of Shit" is connected to the rest of the Internet even when there is no need for it (beyond data-slurping, snooping and ad-generation)
...there was another way to get light from a candle other than spending £50 for another pointless gadget. It's even more amusing that the makers market it as a green solution! Get a UCO lantern; costs half as much, will never break down and provides light for twice as long on one candle!
Candles work the same way as incandescent bulbs - they're just low temperature black-body radiators, with the vast majority of the energy being infra-red. Candles are quite a bit cooler than most bulb filaments, so they're even less efficient at producing visible light. With bulbs only around 2% efficient to start with, that leaves candles giving off something close to 99% of their energy as heat. You don't even need a very efficient waste heat gathering process for it to be far more useful than just using the raw candle for light.
That picture of the Awesense sensor reminds me of the clothes pegs my mother-in-law uses to hang her knickers out to dry on the overhead power lines...
Yes, sorry, that one's so old it has a carbon date. Mine's the one with the Les Dawson joke book in the pocket...
Sucking power from trees to later detect a fire? By driving a giant nail into them? HOW ABOUT USING ENERGY FROM THE FIRE? Is that too obvious? A reservoir of liquid and a turbine. Heat from the fire boils the liquid, drives the turbine, and provides tons of power. It's so good at harvesting power that the circuits will stay nice and cool until the liquid runs out.
"The popular press keeps banging on about smart thermostats and wearable technology, as though that were the Internet of Things..."
Surely The Reg would never stoop to such silly pooh-poohing when they of course know full well the difference between the cambrian explosion of networked measurement systems that is upon us and a toaster that tweets.
Humans as batteries? Worked in the matrix.
Being a bat fastard I long for an implant that harvests the power of bacon so it ends up fueling my devices rather than my waistline.
"No love, you look positively skinny in that outfit. Hey, your mobile's getting low, here, eat this bacon butty."
Sod curing cancer, cure bacon instead.
On the graphic there is the legend:
"32kHz Quart Oscillator"
Is this a UK Quart or a US Quart because there is a difference:
So they should be:
32kHz 1.1365225 litre Oscillator (UK) --> 0.66 Bulgarian funbag Oscillator
32kHz 0.9463529 litre Oscillator (US) --> 0.55 Bulgarian funbag Oscillator
I think we should be told - the truth is out there.
Biting the hand that feeds IT © 1998–2019