Use 433MHz transmitter for video rca?

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Discussion Overview

The discussion centers around the feasibility of using 433MHz transmitter and receiver modules to transmit a video RCA signal for connection to a television. Participants explore the technical challenges and limitations of this approach, including bandwidth considerations and alternative solutions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses interest in transmitting a video RCA signal using 433MHz modules, noting previous success with data transmission through microcontrollers.
  • Another participant points out that standard video signals require approximately 7MHz bandwidth, suggesting that the 433MHz modules may not be suitable for this purpose.
  • A question is raised about the distance over which the signal can be transmitted, with concerns about the low power output of typical 433MHz modules.
  • Some participants suggest considering 2.4GHz modules as an alternative, citing the availability of ready-to-use A/V sender and receiver units.
  • There is a discussion about the correct notation for frequency, with emphasis on using "MHz" instead of "mhz." Participants express frustration over notation errors.
  • One participant questions the original claim that RCA operates at only a few kHz and asks how the signal will be modulated for transmission.
  • Clarification is sought regarding the use of "RCA" as a term for composite video signals, with some participants noting the common usage despite its technical inaccuracies.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the feasibility of using 433MHz modules for video transmission, with multiple competing views regarding the suitability of the technology and the necessary bandwidth. There is also disagreement about the original claim regarding RCA signal frequency.

Contextual Notes

Limitations include the unclear assumptions about the modulation method for video signals and the dependence on the specific characteristics of the 433MHz modules. The discussion also highlights potential misunderstandings regarding the terminology used for video signals.

Tesladude
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Hi I want to transmitt a video rca signal with dome of the 433mhz transmitter and receiver modules you can get on ebay for cheap.

I have used them a lot and have accomplished transmitting data through picaxe microcontrollers successfully.

But could I use it to transmitt a video rca signal so that the output can be connected to a television?

I think I read that rca is at only a few khz and I have been transmitting data at 4mhz so there should be no problem with clarity.
Has anyone done this?
Will it work?
 
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the video will most likely still be pretty crappy
a standard video signal is ~ 7MHz bandwidth

Also 433MHz isn't really for that sort of thing ...that ISM band is mainly for narrow bandwidth/low data rate applications at a low power level

cheers
Dave
 
do you know any way to accomplish this without buying an expensive rca transmitter?
 
What distance?
 
dlgoff said:
What distance?

yeah that's a good Q

most of those433 MHz modules are only ~ 10 mW
and 10mW spread across 7MHz is not going to go farYou mite want to look at 2.4 GHz modules
There's already a mass of 2.4GHz A/V sender and receiver units on the market
... no point in making it hard for yourself

a lot of electronics retailers sell complete units ready to use

ohhh and by the way, Tesladude, get used to using the correct notations, it saves confusion
MHz NOT mhz :smile:Dave
 
davenn said:
ohhh and by the way, Tesladude, get used to using the correct notations, it saves confusion
MHz NOT mhz :smile:

Yeah, a 433 milliHertz channel is going to be mighty slooooooooowwwwww... :biggrin:

(I fixed the thread title to MHz now.)
 
cheers
Mike :smile:

D
 
Yes!
Mhz, not mhz.
I hate it when others make that mistake so I probably should not be making it!
I use a 433"M"hz transmitter that is 1.5 watts and is supposed to reach about 3Km.
I would like to transmit the video signal as close to 3Km as I can get.
 
"I think I read that rca is at only a few khz"

Not sure where you got that from.

How do you plan to modulate the signal? Wide bandwidth composite video onto the 433MHz carrier? No audio, I assume.
 
  • #10
Yes!
Mhz, not mhz.
I hate it when others make that mistake so I probably should not be making it!

NO not Mhz

its MHz Hz = Hertz after Mr Hertz

Dave
 
  • #11
meBigGuy said:
"I think I read that rca is at only a few khz"

Not sure where you got that from.

not sure what you are referring to ?

rca should be RCA as in the plug/socket, not ideal but commonly used for composite video signals

Dave
 
  • #12
I was refrerring to the OP's statement in post 1 "I think I read that rca is at only a few khz"
 

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