READ HERE:
This is not a very new concept but one that is perhaps not known much today, but it can be very useful when you don't have internet and/or are living out in the winderness. It can also be fun for rescue people, or just to enhance your tech./multi-media abilities. It can be used to transmit computer files over things like radio/shortwave, laser communication, and phone lines (with a simple, but proper isolation circuit with a transformer). The data is stored as a sound file and that is what is actually transmitted with the radio waves or with laser light There are several types of programs available today for free on the internet. Most are for "shortwave/Ham Radio" communication - some are even for satellite signals such as weather maps, etc. Some are for transmitting only images, some for slow scan/simple television. This program in the video only uses the basic agreed upon standard form of storing compuer data to an audio form - mainly for tape recorders, and it's a small, no frills/no clutter of a program (and you dont' need to know a thing about digital and electronics....the program does that automatically for you). I think it's very good to begin with, to just get a basic feel of things. It's actually a (system) DOS program that I run using WindowsXP system, but that also allows you more control over the options by making simple "batch (.bat) files/programs if you want.
Subscribe and message me and I will send you the free program link.
To receive a radiowave with this type of data, you only need the radio receiver, and not the transmitter. You just have to find a good way (line in, mic) to get that sound into your computer soundcard or audio recorder for later processing.
Even if you learned a bit about data sending and receiving then that is alot. I understand most people don't want to bother while we have good internet service to communicate with.
Don't forget, you can make a "home network" easy if you have several computers, wireless included. Look it up, it's included with the Windows operating system, and you can transfer (send/receive) computer files from one computer to the other using direct connections or your broadband wireless connection.
Before alot of these computer and shortwave data transmission stuff (RTTY - Radio TeleType), there were other popular forms of data transmission such as Fax Machines (send images over the phone lines), and TTY (Tele-Typewriter or "Tele-TYpe") communicaion for people who can't hear enough, it's sort of like a text chat machine that you attach to your phoneline.
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Some Links:
Sound Card Interfacing (if needed): http://www.youtube.com/watch?v=FmsFhz_dyAg
Program to receive digital transmissions on the internet, without a shortwave radio:
http://www.youtube.com/watch?v=GB9Ed02Vhr8
SDR - Software Defined Radio: http://www.youtube.com/watch?v=_VtN9iIQbXk
CERT : A USNERDOC video , shows a program using
MT63 for noisy signals/enviornments: Text and TextChat Modes: http://www.youtube.com/watch?v=A7xU9mMn77Y
THOR video: another scheme of communication http://www.youtube.com/watch?v=6slNwyp3D60
MFTTY - Text Chat, TeleType, good for noisy areas.
http://www.polar-electric.com/MFTT/index.html
Image to audio and audio tape storage: http://www.youtube.com/watch?v=fecEJxh3SpE
Digital music to audio tape storage:
http://www.youtube.com/watch?v=2mseiBwPKvk
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SSTV - Slow Scan TV - Transmit Still Images of Anything: http://www.youtube.com/watch?v=r-aJm5q9LmQ
A Wikipedia article: http://en.wikipedia.org/wiki/Slow-scan_television
Linked From Wikipedia, good article: http://www.g0hwc.com/
A SSTV test: http://www.youtube.com/watch?v=z8fwFbEtmtk
SSTV : http://www.youtube.com/watch?v=Hi7YjQXAs4I&feature=related
SSTV - Fax - http://www.youtube.com/watch?v=7ss1xWEOO6Q
Nasa and SSTV: http://www.youtube.com/watch?v=mW9DXHkKpNo&feature=related
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NBTV - Narrow Band TV (video): http://www.youtube.com/watch?v=4cYBciBjLNQ
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A simple laser communication circuit using a dollar-store laser: http://www.youtube.com/watch?v=HKRPfa66_po
The laser method can also use (fast) digtal pulses: http://www.qsl.net/n9zia/wireless/laser/laser.htm
Advanced Laser Networking: http://www.youtube.com/watch?v=mZnH4_FAGR
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For further technical reading about serial communication you can start here:
Serial Data Communication: http://en.wikipedia.org/wiki/Serial_communication
Tele-Type (TTY): http://en.wikipedia.org/wiki/Teletypewriter
RTTY - Radio TTY: http://en.wikipedia.org/wiki/RTTY
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Shortwave Listening: http://en.wikipedia.org/wiki/Shortwave_listening
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Computer Data Storageby jziller91954 views
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