tv transmitter very homely

rajaram04 · Jun 19, 2013

Hello sir

i got a diagram of a tv transmitter but its a practical image not the circuit wiring diagram

so would you please get me circuit diagram of the same or any which can be designed very easily in home ????

thanks

kalaci · Jun 27, 2013

Dear Friend,
instead of giving you the circuit diagram I give you an idea.
Old VCRs are not anymore used in many households, DVD technology made them obsolete. Those are obtainable on flea markets or on Internet auction sites for next to nothing. Every VCR contains a TV transmitter, many of them - the older ones - are easy to use. You can tell one from the other: if the output channel can be altered with a slide switch or a knob (you can find them close to the female RF output socket), then the transmitter is easy to use.
Disassemble the VCR and you will find the TV transmitter right behind the RF outlet, the Audio and Video inputs are marked on the RF shield or on the PCB, also the (usually) +12V supply and GND points.
The RF transmitters in the late models are I2C controlled, those are not easy to use separated. But if you have enough space, you can use the whole VCR as it is, only inserting the video and audio signals.
I hope I could be of help, best regards
Laszlo from Hungary

rajaram04 said:
Hello sir

i got a diagram of a tv transmitter but its a practical image not the circuit wiring diagram

View attachment 92557

so would you please get me circuit diagram of the same or any which can be designed very easily in home ????

thanks

anilrock87 · Jun 27, 2013

Hi,

Find the attached PDF.

goldsmith · Jul 3, 2013

Hello sir

i got a diagram of a tv transmitter but its a practical image not the circuit wiring diagram

542097_369751409757015_1846544545_n.jpg

so would you please get me circuit diagram of the same or any which can be designed very easily in home ????

thanks

Hi rajaram04
First of all it depends on which country you are in ! because standards and methods of TV transmitters are so different in countries . ( do you need to send both voice and image ? or perhaps just image ? )
According to your name i can guess that you are from india . am i right ? so what kind of TV transmitter you want to build ? digital transmitter or analog transmitter ( VSB ) ?
Best Wishes
Goldsmith

rajaram04 · Jul 25, 2013

goldsmith said:
Hi rajaram04
First of all it depends on which country you are in ! because standards and methods of TV transmitters are so different in countries . ( do you need to send both voice and image ? or perhaps just image ? )
According to your name i can guess that you are from india . am i right ? so what kind of TV transmitter you want to build ? digital transmitter or analog transmitter ( VSB ) ?
Best Wishes
Goldsmith

ya sir you are right , & i just want to make simple analog transmitter & later i ll think over digital & all that , first let me make & learn the basics . . thanks :grin:

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anilrock87 said:
Hi,

Find the attached PDF.

thanks a lot sir let me try this

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kalaci said:
Dear Friend,
instead of giving you the circuit diagram I give you an idea.
Old VCRs are not anymore used in many households, DVD technology made them obsolete. Those are obtainable on flea markets or on Internet auction sites for next to nothing. Every VCR contains a TV transmitter, many of them - the older ones - are easy to use. You can tell one from the other: if the output channel can be altered with a slide switch or a knob (you can find them close to the female RF output socket), then the transmitter is easy to use.
Disassemble the VCR and you will find the TV transmitter right behind the RF outlet, the Audio and Video inputs are marked on the RF shield or on the PCB, also the (usually) +12V supply and GND points.
The RF transmitters in the late models are I2C controlled, those are not easy to use separated. But if you have enough space, you can use the whole VCR as it is, only inserting the video and audio signals.
I hope I could be of help, best regards
Laszlo from Hungary

ohh thats the point i am getting here , thanks a lot sir amazing info i got let me proceed if i can find a VCR

goldsmith · Aug 2, 2013

ya sir you are right , & i just want to make simple analog transmitter & later i ll think over digital & all that , first let me make & learn the basics . . thanks

Hi rajaram04
So first of all you should learn about AM-VSB if you are going to learn about analog TV transmitters . and FM modulation for the audio . ( in my country there are both Digital and analog transmitters and receivers available . and here the picture will be sent by the AM-VSB and the audio by the FM stereo .

So try to learn about how to create those signals which are not so complicated !
Best Wishes
Goldsmith

PA4TIM · Aug 3, 2013

https://www.pa4tim.nl/?p=1357 this is a very simple TV transmitter. Just for inhome, B&W and no voice. It was just a fun experiment and it worked fine. You could call it a TV-bug.

mrjava241 · Nov 11, 2013

This project did a USB to NTSC over the air TV transmitter: https://code.google.com/p/usb-uhf-transmitter/

Audioguru · Nov 11, 2013

The world spreads more and more between modern countries and old countries.
In North America we don't use NTSC TV anymore since all TV transmission is UHF digital high definition today.

I bet the TVs in the old countries still have a cathode ray tube as the display.

SANDEEP ANAND · Nov 11, 2013

HELLO Rajaram
you can get tv transmitter circuit from old cd player too,

rajaram04 · Nov 11, 2013

SANDEEP ANAND said:
HELLO Rajaram
you can get tv transmitter circuit from old cd player too,

hey bhai how is that possbile tell me please . . help me in getting it practically please

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Audioguru said:
The world spreads more and more between modern countries and old countries.
In North America we don't use NTSC TV anymore since all TV transmission is UHF digital high definition today.

I bet the TVs in the old countries still have a cathode ray tube as the display.

ya most them have CRT but we are upgrading & many of us are applying LCD or LED concept everywhere , its tv cpmputer etc

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mrjava241 said:
This project did a USB to NTSC over the air TV transmitter: https://code.google.com/p/usb-uhf-transmitter/

ohh i see let me read & learn

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goldsmith said:
Hi rajaram04
So first of all you should learn about AM-VSB if you are going to learn about analog TV transmitters . and FM modulation for the audio . ( in my country there are both Digital and analog transmitters and receivers available . and here the picture will be sent by the AM-VSB and the audio by the FM stereo .

So try to learn about how to create those signals which are not so complicated !
Best Wishes
Goldsmith

hm i see ya sure i ll follow , its a better option

Audioguru · Nov 12, 2013

CD plays audio, not video . DVD plays video.

rajaram04 · Nov 12, 2013

Audioguru said:
CD plays audio, not video . DVD plays video.[/

ya dvds are ok but how can we get tv transmitter circuit from old dvd player

SANDEEP ANAND · Nov 12, 2013

audioguru said:
cd plays audio, not video . Dvd plays video.

cd player can play video too

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SANDEEP ANAND said:
HELLO Rajaram
you can get tv transmitter circuit from old cd player too,

when you disassemble a cd player you will see power section, video card ,lens and a approx 4" x3" shield box, its a rf transmitter section ,in my localty i had buy it for 40 inr.Operating voltage 5 to 8 volt .its able to transmit audio + video rf signal up to a distance of 50 meter very fairly.

rajaram04 · Nov 12, 2013

SANDEEP ANAND said:
cd player can play video too

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when you disassemble a cd player you will see power section, video card ,lens and a approx 4" x3" shield box, its a rf transmitter section ,in my localty i had buy it for 40 inr.Operating voltage 5 to 8 volt .its able to transmit audio + video rf signal up to a distance of 50 meter very fairly.

wohoooooooo amazing , so thats the reason that vicinity nieghbourhood people are able to recieve vdo signal with some distortion & some times with very clearity . . .

well how to attach a cam unit with that ? is there any proper diagram you have ?
do we have to introduce some interpreter type circuitry in between ? . . please comment

SANDEEP ANAND · Nov 14, 2013

so you want to make wireless camera for your home?which camera do you use in your project?

rajaram04 · Nov 14, 2013

SANDEEP ANAND said:
so you want to make wireless camera for your home?which camera do you use in your project?

ya exactly the aim is what you said but which camera ? i don't know as i have no idea , so you can explain it better from begining to end

SANDEEP ANAND · Nov 15, 2013

WHICH CAMERA MODULE YOU HAVE?

YOU CAN SEE that the in camera module have 3 connections,(+5v,Gnd,video out), 2nd camera kit have 4 connections (+5v,Gnd,audio output,video output) ,the transmitter kit have 2 input (audio ,video) connect them properly ,and use an indoor antenna or long copper cable as a antenna for your TV and start channel scan...............

rajaram04 · Nov 15, 2013

haailaa jhakaas ! but where could i find all these

too i didn't get last line
"the transmitter kit have 2 input (audio ,video) connect them properly ,and use an indoor camera for your tv and start channel scan..............."

please elaboraste

SANDEEP ANAND · Dec 20, 2013

hope it will help you...............

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tv transmitter very homely

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