In this tutorial, we are demonstrating a project TV transmitter Circuit. A TV Transmitter is an electronic device that radiates radio waves and conveys a video signal delivering moving pictures, alongside a synchronize sound station, and displays the picture on a TV screen.
These signals transmit from frequency channels in the VHF and UHF groups. Since radio waves of these frequencies travel by line sight, they constrain by the horizon to reception separations of 40-60 miles relying upon the height of the transmitter station.
The circuit utilizes only a BC547 signal amplifier transistor. The diode 1N4148 identifies the transmitting signal and then sends it to the transistor to amplify via an inductor of 6 turns and a few other discrete electronic components.
Hardware Components
The following components are required to make a TV Transmitter Circuit
| S.no | Components | Value | Qty |
|---|---|---|---|
| 1 | NPN Transistor | BC547 | 1 |
| 2 | Antenna | – | 1 |
| 3 | Diode | 1N4148 | 1 |
| 4 | Variable Capacitor | 22pF | 1 |
| 5 | Capacitor | 10pF, 47pF, 4.7pF, 470pF | 1, 1, 1, 2 |
| 9 | Resistor | 10K, 470R, 75R | 2, 1, 1 |
| 12 | Video-Input | – | 1 |
BC547 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of BC547
TV Transmitter Circuit
Working Explanation
Here we discuss the operation of a simple circuit of a TV transmitter or video transmitter which can broadcast on VHF between 60 to 200MHz. The input data can be from anywhere from a CCD camera or VCR. The yield power of this VHF transmitter circuit is 80mW and by utilizing a telescopic antenna this circuit will transmit at a distance of 100 meters. The circuit is utilizing just a single transistor that can be a BC337, 2N2222, BC546, or BC108. For L1 wound 6 turns of #24 enameled wire on a 10mm air previous for recurrence 60 – 80MHz.
For 150 – 180 MHz wound 4 turns and for 180 – 200MHz injury 2 turns. If you need to transmit sound, at that point make an FM transmitter and tune it on the sound channel.
Applications and Uses
A TV transmitter is a transmitter that is utilized for terrestrial (over-the-air) TV broadcasting.
