RE: If you could have a copy of one publicly-accessible database, which would you take?
06-14-2023, 12:22 AM
06-14-2023, 12:22 AM
I would say the Gutenberg project there are books that covers many subjects starting from very crude states including books for surprisingly useful electrical equipment made from very crude starts.(Rusty nails or razor blades are low grade diodes) and that along witha power source, access to flexible long conductors and a crude switch is about all you need for a crude radio transmitter.
Destroying the laptop's radios, this had me laughing pretty hard, unless the laptop is made to the highest levels of the "Tempest standard" it's going to be a radio beacon that can be picked up from orbit, especially on a deserted island with no other powered objects for hundreds or is it thousands of miles?
Right now I'm listening to lightning strikes on a modified audio amp that didn't cost $10 dollars and I'm using a small coil and 15 feet of twin speaker wire, the storm is on my states southern border and I'm living nearly on the Northern border.
The same crude set up lets me know when a "varmit" is trying to get through an electric fence on our chicken house 100 feet away and can pick up the flash charging on a game camera at over 20 feet. Active Cell phones are usually obvious at 30 feet and I have used the same antenna with a Software defined radio to read the location beacons on every aircraft that is above my local 5 foot horizon.
One of the very first small personal computers from the 70's had no speakers and yet the engineers had them playing sounds mostly tones or tunes on AM radios with simple loop programs accessing various memory locations and other circuits repeatedly
It's not something I'd recommend, but a carefully damaged USB cable will generate huge amounts of radio noise on multiple bands and a relatively simple program written in say basic trying to access a USB device would let you modulate the noise into Morse code or in very confusing patterns
I've found this out the hard way with cheap USB cables either on my equipment or somewhere on my families equipment.
When I have the time I experiment with Software defined radios for various sensor systems and have a terrible time isolating the old laptops or desktops I use with them.
Metal siding, multiple lengths of wound chokes, clamp on ferrite filters and often quite a bit of tinfoil
The solar powered computer laptop is one very big radio transmitter and It is actually very hard to keep the laptop or for that matter any digital device from transmitting on multiple radio bands and when you put something like that in the middle of a area with no other electronics it's going to stand out like a house on fire.
Sorry for getting off track, the database I'd chose would be the Gutenberg project.
https://www.gutenberg.org/
HDM
Destroying the laptop's radios, this had me laughing pretty hard, unless the laptop is made to the highest levels of the "Tempest standard" it's going to be a radio beacon that can be picked up from orbit, especially on a deserted island with no other powered objects for hundreds or is it thousands of miles?
Right now I'm listening to lightning strikes on a modified audio amp that didn't cost $10 dollars and I'm using a small coil and 15 feet of twin speaker wire, the storm is on my states southern border and I'm living nearly on the Northern border.
The same crude set up lets me know when a "varmit" is trying to get through an electric fence on our chicken house 100 feet away and can pick up the flash charging on a game camera at over 20 feet. Active Cell phones are usually obvious at 30 feet and I have used the same antenna with a Software defined radio to read the location beacons on every aircraft that is above my local 5 foot horizon.
One of the very first small personal computers from the 70's had no speakers and yet the engineers had them playing sounds mostly tones or tunes on AM radios with simple loop programs accessing various memory locations and other circuits repeatedly
It's not something I'd recommend, but a carefully damaged USB cable will generate huge amounts of radio noise on multiple bands and a relatively simple program written in say basic trying to access a USB device would let you modulate the noise into Morse code or in very confusing patterns
I've found this out the hard way with cheap USB cables either on my equipment or somewhere on my families equipment.
When I have the time I experiment with Software defined radios for various sensor systems and have a terrible time isolating the old laptops or desktops I use with them.
Metal siding, multiple lengths of wound chokes, clamp on ferrite filters and often quite a bit of tinfoil
The solar powered computer laptop is one very big radio transmitter and It is actually very hard to keep the laptop or for that matter any digital device from transmitting on multiple radio bands and when you put something like that in the middle of a area with no other electronics it's going to stand out like a house on fire.
Sorry for getting off track, the database I'd chose would be the Gutenberg project.
https://www.gutenberg.org/
HDM