The Simplest TV transmitter ever made

We have earlier discussed how to make the simplest FM transmitter, now it’s time to make a TV transmitter.

We can broadcast our DVD playbacks, etc to our neighborhood area by use of this circuit. But I tell you a thing, this type of circuit should be used for testing purposes and projects, we aren’t legally allowed to broadcast in TV frequency.

This below circuit will broadcast our video/audio to VHF band channel no 9, we can adjust channel number by the help of a trimmer also.

All we need is basic electronics knowledge, some wires, a RF box(av to rf converter, usually used inside cdplayer, dth etc), a 5V supply and a stick Ariel. The following figure is of such a RF box.


This RF box won’t cost you more than 25 rupees, so the total cost of this circuit is around 50 rupees only.

You should connect the Audio(Red/white) cable to the 1st pin, +5Volts supply to the 2nd pin, Video(yellow) to 3rd and com(gnd) to 4th pin.

The RF output tap should be connected to stick aerial (separated from gnd), and kept in height vertically. By default, it will broadcast on Channel 9, but you can adjust the output channel frequency by trimming the IF coil there(small blue).

The range is about 100-150 meters if everything is set up properly.

Comments on this article before 07-12-2011, here jump to recent comments .

  • zinaung on May 17, 2011 – 6:42 pm

    I am zinaung from yangon,I want to need simple RF converter circuits .are u send me this circuits.

    Arup Reply:
    May 17th, 2011 at 10:02 pm@zinaung,
    Stay tuned to our updates, you’ll receive such circuits soon.

  • yogi on June 9, 2011 – 9:34 pm

    can u post ckt diagram of this tv tx

    Arup Reply:
    June 9th, 2011 at 9:39 pmEven if I post the circuit diagram, it will consist of 50+ components so hard to make. Just buy the RF modulator from electronics shop at 20-25 rupees.

    yogi Reply:
    June 10th, 2011 at 7:59 amsir plz post ckt i am interested

    Arup Reply:
    June 10th, 2011 at 10:29 amThis is here: http://2.bp.blogspot.com/_kI63MkZyZzI/THZWIzUan4I/AAAAAAAAAGY/2X8KUigTGlI/s1600/Picture+008.jpg

    The coils used there you should buy. Ask the electronics shopkeeper for FM radio coil set.

  • by kumar on June 10, 2011 – 8:24 am

    Sir,we can transmit the tv signal in to air and let me know how can i receive the transmitted signal and post receiver ckt if u have.thank u

    Arup Reply:
    June 10th, 2011 at 10:29 amYou can receive the signal in TV by TV antenna. No special circuit needed. The TV antenna will do it.

    [Reply]

  • Pradeep kumar on September 29, 2011 – 7:12 am

    sir, how can i build a tv antena. now a day it is not available in market

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24 Responses

  1. Issa ssebayinda says:

    i nee a good schematic diagram of that t.v transimiter

  2. dhanasekar says:

    can we use antenna directly in rf out of this box

  3. roshan says:

    i want to buy this kit but it is not available at my place.can u send me?
    i will pay all charges

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