television signals
I havent purchased a propeller yet, but something mentioned in one of the documents i read about it made me very interested...
the line was something like:
" the stamp can even transmit wireless signals to televisions(sorry fcc)"
i am interested in what this statement means. not for nefarious reasons, for an art project idea ive got..
anyone know what i am talking about?
Thanks alot!
Robert
the line was something like:
" the stamp can even transmit wireless signals to televisions(sorry fcc)"
i am interested in what this statement means. not for nefarious reasons, for an art project idea ive got..
anyone know what i am talking about?
Thanks alot!
Robert
Comments
crazy!
and, because of the 8 cogs, i presumeone can send multiple streams?(though i suppose interfernece may be an issue...)
thx.
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Life is one giant teacup ride.
i imagine this works by taking a signal and 'modulating' it at an appropriate frequency?
is there a website somewhere that talks about these techniques? i look forward to playing with a propeller eventually(like, when i can afford the development system), however, i am also very interested in a tiny device tha can display words on a tv screen with no battery...
i was imagining a tiny PIC on a tiny PCB, and an antenna or whatever...
is there a 'name' for this technique of signal transmission?
"No battery"? I'm not sure what you think is going on, but there is indeed power being fed to the system...there is no "magic" going on....this is simply (but genius on a chip) an NTSC signal being synthesized and broadcast in more or less the same way TV stations do it...
Or perhaps I'm missing your point...
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Truly Understand the Fundamentals and the Path will be so much easier...
this 'with no battery' thing, it must be a typo. i think i meant to say '...with no special transmitting hardware', i know about batteries and how they make wind.. i mean power...
the reason i am asking about this is i had an idea for a 'bottle', and when you open it, tv signals come out... or a fortune cookie, and when you crack it open, it gives you your fortune on a tv.
the propeller chip is too expensive for what i would want to do sell these 'inexpensively' at my art shows. i think it is very intriguing that a small device could store and transmitt tv signals.. i immeddiately thought 'i wonder if any of the higher-end 8pin PIC\atmel MCUs could do this.'
i was hoping there is a name for this technique so i can do my own research - google words to search on..... "ntsc synthesis" isnt going to do it. i figured this might have a special name, sort of like 'bit banging'. it makes me think of bit banging...
YES. before someone tells me that bit banging is somethign else entirely, and unrelated, i understand that... it was an example of a way MCUs can generate specific signals which may normally require additional circuitry through default hardware tricks.
(i am getting used to posting here... dont try and explain what you mean.. explain what you dont mean - so noone else explains it for you).
The animated picture may help you visualize whats going on. Basically the base frequency of the channel chosen is modulated by the NTSC video signal, IOW the amplitude of the channel frequency is determined by the level of the NTSC signal.·The frequencies for the channels is easily searchable under "broadcast television channel frequencies".
You may be able to find a processor capable of doing it if it has a specilized high speed counter whose amplitude can be·dictated in a high speed fashion. However, in my experience not many microcontrollers provide counters that are versatile enough to do this.
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Life is one giant teacup ride.
Post Edited (Paul Baker) : 6/9/2006 6:09:47 PM GMT