There has been some fusor research going on for decades. The issue that killed that direction of fusion research was ultimately that the electrons do not behave as the initial simple models suggested and in the real world the power loss from the fast electrons is just too big for any reasonably sized device to allow for self sustaining fusion.
Other commenters have pointed out the problems with overloading of connectors and reduced efficiency because of the added resistance but there is another really important reason not to chain power strips: circuit breakers work best against short circuits when the resistance between the breaker and the short is fairly low (for instance less than 0.5Ω) so that the current will quickly go over the rated current of the breaker. If the resistance is a lot higher because you have too many extensions between the breaker and the fault, the time the breaker needs to react will go up. Counterintuitively this usually means more energy will be turned to heat by the fault.
In extreme cases this can mean the difference between a broken power strip that you can just throw out and a burned down house.
What makes them think that the library of Alexandria did it any other way? Nerds have existed long before the internet…
you mean turing complete?
oh i must have missed a few orders of magnitude there. 6Mt of helium is a ridiculous amount though … what is all that used for? according to WA that is about the water volume of the three gorges dam at STP
Edit: just read the report, wow, more than a quarter of all the helium is used just for “breathing mixes” which i assume means its for scuba diving.
from the wiki article on Helium:
an estimated 3000 metric tons of helium are generated per year throughout the lithosphere.
I think the main issue here is not that we are loosing helium on a planetary scale but that the easy to reach helium from gas wells is wasted. We will never run out of helium at our current rate of consumption before the sun goes nova, if we consider all sources on earth, but it will get a lot more expensive and the supply will get less steady.
this is extra tricky because they did not specify the exact kernel. mainline could be any of the kernels tagged as stable that you can build from linus’ git tree. i know that in the past you could run a mainline linux on intel 368 chips but today you probably can not because official support was dropped a while ago.
In the Netherlands you can legally buy grow kits for magic mushrooms. They are fairly easy to use, mostly just weekly/daily checks to keep moisture at the right level and making sure to harvest at the right times (you usually get multiple harvests from just one kit).
Personally i think doing a shroom trip alone is too dangerous … so maybe find a group first?
skipped reading the silkscreen … it says Q1 on the lowermost package but the other three are diodes. so could also be a forward converter or something similar.
indeed it looks like a Royer oscillator in there (because there are transistors before AND after the transformer).
Acording to the datasheet the TDA7294 uses -Vs and +Vs in the block diagram so i would assume it is intended to be used with DC power. If the module is specced for use with AC as well as DC, then this just means what you already suspected: it has an integrated bridge rectifier and most likely some sort of low pass for the rectified power (read: a bunch of big capacitors).
You could just go with a big transformer core that powers them all at the same time; many commercial amps do that and it works fine in general, provided you have enough margin for power spikes and the modules will not influence each other when connected in parallel to power.
In my opinion using separate transformers would be paranoid but it would work of course.
Edit: dont forget that this thing will produce heat. If you really go with an 800W transformer then you have to be able to cool about 400W in the worst case (going by the data sheet power dissipation of the chip and assumed transformer + rectifier efficiency of 90%).
Looking at the price per kWh for commercial batteries tells me that we are seeing the battery revolution right now.
Graphene is already commercially used in some applications:
There are already very effective cures for some types of cancer (note that the differences between the many types of cancer can be huge and so the effort and time needed to create cures will also be very different. some treatments also are effective but not completely understood yet, like for bladder cancer)
Nuclear fusion devices are commercially used in material analysis (mostly in the semiconductor industry and in ore processing). There are different types in use – some even use thermonuclear fusion on a small scale.
It all seems like super crazy superconductor level tech until it becomes mundane and part of peoples lives … then we stop noticing how amazing it really is.
woah this is awesome!
maglevs need classical wheel systems anyway because there might be a power outage, so simply having wheels that are compatible with the local rail system is a brilliant idea.
add in a tiny propulsion system so they can use the normal tracks at low speed without the help of the maglev tracks and you can sort of blend the two systems together in critical locations like switches and train stations.
OpenWRT does not use liblzma or systemd so i think that one is pretty safe. I would also be surprised if Android included OpenSSH server binaries in that way.