Hi all, I've done some tests on old mobile phone packs and they can and do explode in flames if overcharged then shorted.
Had to use a screwdriver to initiate the reaction but its possible that overcharge-induced internal short could have been enough. Then, the phone's battery casing acted like a shaped charge, in that the hot gases were briefly confined and burst out of one area. The force generated would be enormous (these things are used to compress plutonium in "Physics Packages") !
Lesson learned: do not do Li charging in software, its far too risky.
And they allow portable DVD players on planes? Li cells 10* the volume of mobile packs + overcharge + strategically placed drawing pin + fist = Instant incendiary device, Macgyver-style:)
Oh, and there's the favourite camera flash hooked up to battery trick, this also induces rapid disassembly with flame:)
what about using a miniature tritium light, with a blue LED connected to an analogue amplifier and chopper? Totally random, and there is absolutely no detectable radiation leakage due to the "soft beta" emission.
the other variant is a cheap camera (perhaps one from an optical mouse?) and an americium source, but there are issues with these being used in chips.
ROFL!!!
Actually I studied this at Hertfordshire Uni back in 98, and I can assure you that the article is complete, unadulterated pseudoscience. I don't know how they got this past peer review but it gibberish.
As any biology student knows, nerve transmission works by transmission of action potentials- in effect a "wave" of potassium ions moving along the nerve fibre. This wave generates an electrical potential of several tens of millivolts which can be detected using a sensitive amplifier.
Interestingly, many of the problems associated with detecting the (very small) electrical signals produced by nerve fibres might be solved by the use of an electrochemical sensitive chip which measures tiny changes in potassium levels.
-A
Nah, why mess around in hyperspace, the answer is to use the Infinite Improbability Drive..:)
-A
(Inertia manipulation by locally depleting zero point field might be feasible, think of a long tunnel between start point and destination the width of a single photon wavelength)
Hmm. I'm also looking into this, and the phenomenon seen here does seem to be unusually luminous even for burning silicon.
Its possible that there are several forms of "ball lightning" and what they have discovered is one of those forms.
However, charging the floor with a high voltage (say 8KV) would be a logical next step to see if the free floating type can be duplicated, given that an electrostatic repulsion effect may be in operation.
Also, an additional improvement would be to rapidly spin the vaporised silicon using an axial magnetic field, in the same way as a plasma cutter does.
Apparently according to someone on 4HV who has played with one of these, the stability of the software may be an issue as it crashed three times during testing.
Its possible they had a bad unit though.
I'd make the OS open source, so bugs like this can be fixed by Flash update (perhaps with a reset button to prevent brickage)
-A
Hi.
So far this year (2006) I've repaired no less than six LCD monitors with this fault. I also had to repair my Sony laptop.
In all the (Dell) cases the capacitors had bulged and/or split, causing the monitor to fail switch-on or display gibberish. In one case it blew the circuit protector as a cap went dead short.
If you have an LCD monitor with random problems its well worth checking the capacitors by replacement- its a simple fix and might get another 2 years or so out of the monitor before the backlights fade.
-A
Hi, it occurs to me that a good idea might be to use the 75C BiInSn (or perhaps the 59c BiInSnPb) alloy, in combination with a heated syringe with stepper motor based plunger to make a metal object. This also means that you can re-melt the alloy when done (perhaps after making a mould)
Also possible to "print" over a previously shielded PCB, and use Maglocks (tm) for connections to the outside world...
This is interesting, but the way it appears to work is much the same as temporarily demagnetising a magnet by applying an AC field.
The problem is that this weakens the magnet each time due to field coupling, resulting in a dead magnet after a short time.
The only way to get around this is to use a magnetic shield which blocks part of the field from the magnet to generate torque in one direction. Pyrolytic graphite is nowhere near strong enough unfortunately, and there is speculation that in order for this to have any chance of working you would need to be able to switch the material (nicknamed unobtainium) from a superconducting to an inert state with applied voltage.
Hi..
Its very impressive but has anyone considered the long term stability of "strained silicon" ? Methinks industry will not be happy when the chips mysteriously start failing due to a form of "silicon rickets"...
-A
Slashdot Mirror
Hi all,
:)
:)
I've done some tests on old mobile phone packs and they can and do explode in flames if overcharged then shorted.
Had to use a screwdriver to initiate the reaction but its possible that overcharge-induced internal short could have been enough.
Then, the phone's battery casing acted like a shaped charge, in that the hot gases were briefly confined and burst out of one area. The force generated would be enormous (these things are used to compress plutonium in "Physics Packages") !
Lesson learned: do not do Li charging in software, its far too risky.
And they allow portable DVD players on planes? Li cells 10* the volume of mobile packs + overcharge + strategically placed drawing pin + fist = Instant incendiary device, Macgyver-style
Oh, and there's the favourite camera flash hooked up to battery trick, this also induces rapid disassembly with flame
-A (IANAT) Next stop Gitmo... LOL!
what about using a miniature tritium light, with a blue LED connected to an analogue amplifier and chopper? Totally random, and there is absolutely no detectable radiation leakage due to the "soft beta" emission.
the other variant is a cheap camera (perhaps one from an optical mouse?) and an americium source, but there are issues with these being used in chips.
(insert "$$$$$$$".c)
-A
ROFL!!! Actually I studied this at Hertfordshire Uni back in 98, and I can assure you that the article is complete, unadulterated pseudoscience. I don't know how they got this past peer review but it gibberish. As any biology student knows, nerve transmission works by transmission of action potentials- in effect a "wave" of potassium ions moving along the nerve fibre. This wave generates an electrical potential of several tens of millivolts which can be detected using a sensitive amplifier. Interestingly, many of the problems associated with detecting the (very small) electrical signals produced by nerve fibres might be solved by the use of an electrochemical sensitive chip which measures tiny changes in potassium levels. -A
Nah, why mess around in hyperspace, the answer is to use the Infinite Improbability Drive.. :)
-A
(Inertia manipulation by locally depleting zero point field might be feasible, think of a long tunnel between start point and destination the width of a single photon wavelength)
Hmm. I'm also looking into this, and the phenomenon seen here does seem to be unusually luminous even for burning silicon.
Its possible that there are several forms of "ball lightning" and what they have discovered is one of those forms.
However, charging the floor with a high voltage (say 8KV) would be a logical next step to see if the free floating type can be duplicated, given that an electrostatic repulsion effect may be in operation.
Also, an additional improvement would be to rapidly spin the vaporised silicon using an axial magnetic field, in the same way as a plasma cutter does.
-A
Apparently according to someone on 4HV who has played with one of these, the stability of the software may be an issue as it crashed three times during testing. Its possible they had a bad unit though. I'd make the OS open source, so bugs like this can be fixed by Flash update (perhaps with a reset button to prevent brickage) -A
Hi. So far this year (2006) I've repaired no less than six LCD monitors with this fault. I also had to repair my Sony laptop. In all the (Dell) cases the capacitors had bulged and/or split, causing the monitor to fail switch-on or display gibberish. In one case it blew the circuit protector as a cap went dead short. If you have an LCD monitor with random problems its well worth checking the capacitors by replacement- its a simple fix and might get another 2 years or so out of the monitor before the backlights fade. -A
Hi, it occurs to me that a good idea might be to use the 75C BiInSn (or perhaps the 59c BiInSnPb) alloy, in combination with a heated syringe with stepper motor based plunger to make a metal object. This also means that you can re-melt the alloy when done (perhaps after making a mould)
Also possible to "print" over a previously shielded PCB, and use Maglocks (tm) for connections to the outside world...
-A
This is interesting, but the way it appears to work is much the same as temporarily demagnetising a magnet by applying an AC field.
The problem is that this weakens the magnet each time due to field coupling, resulting in a dead magnet after a short time.
The only way to get around this is to use a magnetic shield which blocks part of the field from the magnet to generate torque in one direction. Pyrolytic graphite is nowhere near strong enough unfortunately, and there is speculation that in order for this to have any chance of working you would need to be able to switch the material (nicknamed unobtainium) from a superconducting to an inert state with applied voltage.
-A
Hi.. Its very impressive but has anyone considered the long term stability of "strained silicon" ? Methinks industry will not be happy when the chips mysteriously start failing due to a form of "silicon rickets"... -A