FM transmitter circuit

FM Transmitter Circuits-The BIG List

jojo July 20, 2018 9 Comments
Over years we have developed a number of FM transmitter circuits with various aspects. Today I thought of listing all of them here as a single web page, so anyone can easily navigate through all the radio transmitter circuits and its schematic diagrams. For first time readers- What is an FM transmitter An FM transmitter is basically a small gadget that can broadcast audio from a source on a selected frequency. Usually, personal FM transmitters are plugged into the...
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two transistor fm transmitter

Simple FM transmitter circuit.

admin July 26, 2018 58 Comments
Everyone is a newbie when they first start. In electronics, one of the best and satisfying things to create is an FM transmitter. This is maybe just me but it is still fun to create an FM transmitter even for a pro. So here is a very simple circuit to create an FM transmitter. Two transistor FM transmitter Circuit diagram Components Resistor 86k ohm – 1 nos Resistor 10k ohm – 1 nos Resistor 3.3k ohm – 1 nos Resistor...
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DIY FM transmitter

Stereo FM transmitter

admin July 26, 2018 7 Comments
PLL Stereo FM transmitter circuit How cool will it be if you can create a gadget that can transmit audio from your phone to your home stereo wirelessly? That’s exactly what we tried with this project, we were trying to create an FM transmitter for home use. There are such gadgets available to buy in the market but will it be as satisfying as creating someting of your own? I am pretty sure hobbyists will agree. So let’s start....
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Stereo FM transmitter using BA1404

admin February 17, 2011 33 Comments
Stereo FM transmitter circuit using BA1404. Notes. A high quality stereo FM transmitter circuit is shown here. The circuit is based on the IC BA1404 from ROHM Semiconductors. BA1404 is a monolithic FM stereo modulator that has built in stereo modulator, FM modulator, RF amplifier circuitries. The FM modulator can be operated from 76 to 108MHz and power supply for the circuit can be anything between 1.25 to 3 volts. In the circuit R7, C16, C14 and R6, C15,...
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200M FM Transmitter

jacky March 4, 2010 132 Comments
Description. A very stable and simple FM transmitter circuit is given here. With a matching antenna, this transmitter can attain a range of around 200 meters. I assembled this transmitter few years and got very good results. Let us see how the circuit works. A condenser microphone (K1) is used to pick the sound to be transmitted. Capacitor C1 is a DC decoupler and the sound signal is coupled to the base of Q1 which wired as a preamplifier.R2...
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2 km FM transmitter

john July 26, 2018 454 Comments
In this project, we learn how to create a high range FM transmitter, which has the range of 2 kilo meter (2KM) radius. This is basically a simple DIY hobby circuit and you can try it in your home with minimal components. Start building this high range FM transmitter and see how your output comes. Description. With a matching antenna, the FM transmitter circuit shown here can transmit signals up to a range of 2 kilo meters. The transistor...
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FM transmitter using UPC1651

john August 14, 2009 25 Comments
Description. Here is the circuit diagram of an FM transmitter using the IC UPC1651. UPC1651 is a wide band UHF Silicon MMIC amplifier. The IC has a broad frequency response to 1200MHz and power gain up to 19dB.The IC can be operated from 5V DC. The audio signals picked by the microphone are fed to the input pin (pin2) of the IC via capacitor C1. C1 acts as a noise filter. The modulated FM signal will be available at...
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Medium power FM transmitter circuit

john January 27, 2014 76 Comments
We have opened an online store where 4 very good books on basic electronics are kept for sale. You can read the detailed reviews and authors profiles and buy the book. Books from renowned authors like Forrest M Mims, Charles Platt, Harry Kybett, and Earl Boysen are included. Check it out here:- 4 GREAT BOOKS TO LEARN BASIC ELECTRONICS Description. This is the circuit diagram of a moderate power FM transmitter circuit employing two transistors.The voice signals picked by the...
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Telephone transmitter

john February 24, 2009 8 Comments
Description. This is a simple, but very useful circuit that can be used to transmit telephone conversations. When the telephone receiver is on hook the voltage across the lines will be about 48 volts. The preset R7 is so adjusted to obtain a 24.7 V across between the cathode of D2 and ground. At this voltage the Zener diode D2 will be in breakdown and the transistor T1 will conduct. This makes the transistor T2 OFF. When the receiver...
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Long range AM transmitter.

john February 24, 2009 23 Comments
Description. Here is the circuit diagram of an easy to build long range AM transmitter circuit based on three transistors.With correct tuning and a matching antenna, the transmitter can deliver signals up to a distance of 2 kilometers. The audio signal to be transmitted is given to the base of the transistor Q1 via the audio driver transformer T1.The modulated signal is developed at the collector of transistor Q1.The frequency of the transmitted signal can be tuned adjusting the...
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