The circuit is using a lm2950 5v voltage regulator ic comes in to 92 transistor package, which will provide a stable 5v to the oscillator till the 9v battery runs down to 5. This is a 2w rf amplifier circuit build with single power mosfet lf2810a. With this situation in mind, the author has, designed a simple, easilybuilt 2m f. The power of this long range fm transmitter circuit is very good. Here is a good long range fm transmitter circuit diagram with minimum components but will give a good result. This is very stable, harmonic free, long range fm transmitter circuit which can be used for fm frequencies between 88 and 108 mhz. Build a simple solar powered long range fm transmitter circuit diagram. Long range fm transmitter this is one of the lowcost circuits you can make to build a longrange transmitter. Long range fm transmitter the power output of most of these circuits are very low because no power amplifier stages were incorporated. The extra rf power amplifier used to strenght up the power output to become 200250 milliwatts. Long range, very stable, harmonic free, fm transmitter circuit which can be used for fm frequencies between 88 and 108 mhz. It uses three infrared transmitting leds ir1 through ir3 in series to increase the radiated power. A varicap diode circuit is included to change the frequency of the transmitter and to provide frequency modulation by audio signals.
How to make a 2 mile, long range fm transmitter part 1. Here is a simple circuit that will give you a pretty long range. Apr, 2014 long range fm transmitter circuit diagram click on the schematic image for larger view t1 t2 t3 t4 bf199 t5 2n3866, 2n4427 or 2sc1970 for 1watt 2sc1971, blx65, bly81, kt920a or 2n3553 for 1. Oct 17, 2019 this is a long range fm transmitter circuit in the vhf range. Please practice handwashing and social distancing, and check out our resources for adapting to these times. It has a very stable oscillator because it uses lm7809 voltage regulator which is a 9v stabilized power supply for t1 transistor. With the increased activity on 2 metres, some who may have contemplated working this band, have possibly been deterred by the cost of a black box and the uncertainty of modifying commercial equipment. Use transistors like 2n3866, 2n4427, 2n3553, blx65, kt920a, 2n3375, bly81, 2sc1970 or 2sc1971 if you want to have a pro fm transmitter with enough power to cover a long range area.
Here we have explained the rf transmitter and receiver circuit by controlling the leds wirelessly using rf. Long range fm transmitter circuit 9v to 12v can be able to manufacture the range of two kilometers. Here we are presenting a long range fm transmitter that can cover a reasonable distance of 5 kilometers 3 miles and beyond with a one watt rf power with full circuit details, bill of material and testing procedure. Sonar with up to 2 watts, when used with a supply voltage of about 24v. This fm transmitter circuit built using four radio frequency stages. Fm,fm transmitter,fm transmitter circuit diagram,fm useing transistor,long range fm transmitter. Dec 15, 2019 the fm transmitter produces a range of vhf from 88 hz to 108 mhz. Long range fm transmitter circuit schematic diagram.
This is a long range stable fm transmitter circuit. The circuit is basically a radio frequency oscillator that operates around 100 mhz. This is very stable, harmonic free, long range fm transmitter circuit which can be used for fm frequencies this one is unique in that it runs completely on solar power. Fm transmitter we are going to make is longrange although you can increase more range with the help of a large antenna. The circuit built around transistor t1 bf494 is a basic lowpower variable frequency vhf oscillator. Transmitter circuit described here has the additional rf power amplifier stage, after the oscillator stage, to increase the power output of 200250 milliwatts. Long range fm transmitter electronic circuits diagram. Nov 30, 2017 this is circuit of 5km long range fm radio transmitter circuit. Be prepared and able to communicate in case of emergency with the largest selection at. Long range transmitter circuit 2 to 5 km range last updated on february 1, 2020 by swagatam 155 comments the proposed long range transmitter circuit really is very steady, harmonic free design which you can use with standard fm frequencies between 88 and 108 mhz. The transmission signal can catch upto a distance of 5 km with stable frequency. Sep 16, 2015 the frequency is set at anywhere between the fm frequency range from 88mhz to 108mhz.
Jul 22, 2015 build a simple solar powered long range fm transmitter circuit diagram. Make 1km range and, make 2km range fm transmitter with. This long range fm transmitter uses an rf transistor in its output stage and two bc547s for the first two stages. This fm rf transmitter circuit has two stages first oscillator stage and second rf amp stage. Long range fm transmitter fm transmitters, circuit. How to make longrange fm transmitter circuitweekend projects. How to get long range from fm transmitter home articles. Long range fm transmitter full circuit diagram with explanation.
Jan 7, 2015 fm,fm transmitter,fm transmitter circuit diagram,fm useing transistor,long range fm transmitter. Retekess tr506 portable transmitter mini low power transmitter support microphone and audio input for tour guide church interpretation. The basic working is the same its a two stage transmitter. Aug 08, 2009 long range fm transmitter the power output of most of these circuits are very low because no power amplifier stages were incorporated. Jan 16, 2018 long range fm transmitter circuit 9v to 12v can be able to manufacture the range of two kilometers. Nov 29, 2017 by this homemade 5 km long range fm radio transmitter project circuit. This long range fm transmitter electronic project is a very simple and powerful transmitter circuit with a range up to 1 kilometer in open air. Long range ir transmitter detailed circuit diagram available.
Fm transmitter circuit is one of the cool projects to build with a good range. So weve seen the circuit diagram and how to assemble a longrange fm transmitter. Long range fm transmitter published june 1, 2014 at 738. The fm transmitter produces a range of vhf from 88 hz to 108 mhz. In the case of applications typically do not want a high transmission. The power output of many transmitter circuits are very low because no power amplifier stages are incorporated. The frequency is set at anywhere between the fm frequency range from 88mhz to 108mhz. Long range fm transmitter electronic circuits and diagrams. Long range fm transmitter principle of this project.
The transmitter circuit described here has an extra rf power amplifier stage, after the oscillator stage, to raise the power output to 200250 milliwatts. Long range fm transmitter circuit diagram 2km fm transmitter circuit small fm transmitter circuit fm transmitter circuits best of fm transmitter circuit how to build an fm transmitter circuit quora fm transmitter the simplest f m transmitter ever made circuits diy. An fm transmitter is a gadget that uses the standards of frequency modulation to broadcast sound provided at its input. This is a high quality long range fm transmitter circuit diagram. As long as the sun is shining on the pv panel, the transmitter will transmit. The diagram shows the block diagram for fm transmitter circuit. This is a homemade radio station, long range fm transmitter circuit. In the meantime, you may also read about our 2km fm transmitter circuit and also if you got free time, try our 200m fm transmitter as well. Long range fm transmitter circuit design electronic project. This long range fm radio transmitter has an additional rf power amplifier stage, after the oscillator stage. We have used three ir leds in series for increasing the radiated power.
Long range fm transmitter full circuit diagram with. This will likely encompass 5km spectrum long range. Being manufacturers we even provide the detailed circuit diagram for technicians to attend repairs easily. By this homemade 5 km long range fm radio transmitter project circuit. This is circuit of 5km long range fm radio transmitter circuit. Long range transmitter circuit 2 to 5 km range circuit. Jul 21, 2018 fm transmitter with circuit diagram video. How to make a long range fm transmitter at low cost. The use of transmitters which have a more powerful output than the fleapower are sometimes required when there are many obstacles in the path of thesurveillance transmitter and monitoring station receiver, or thedistance between them is too far so as to make a low powered devicefeasible. The fm transmitter circuits are generates the output power depending on power amplifier. Jan 06, 2015 fm, fm transmitter, fm transmitter circuit diagram, fm useing transistor, long range fm transmitter. The output of the oscillator is about 50 milliwatts.
This is a longrange fm transmitter circuit in the vhf range. Use transistors like 2n3866, 2n4427, 2n3553, blx65, kt920a, 2n3375, bly81, 2sc1970 or 2sc1971 if you want to have a pro fm transmitter with enough power to. With a good matching 50ohm ground plane antenna or multielement yagi antenna, this transmitter can provide. Connect the components as shown in the fm transmitter schematic below. Long range fm transmitter circuit diagram click on the schematic image for larger view t1 t2 t3 t4 bf199 t5 2n3866, 2n4427 or 2sc1970 for 1watt 2sc1971, blx65, bly81, kt920a or 2n3553 for 1. This is how fm transmitter circuit looks on breadboard the audio output signal from the microphone is usually small, the first transistor thus performs the job of amplifying that signal to a level good enough for transmission. We have published lots of radio transmitter circuits, which will help you learn a lot about basic communication electronics. The final stage of the long range rf transmitter is equiped with any rf power transistor that has at least 1 watt output power. Make 1km range and, make 2km range fm transmitter with circuit diagram, or 1. The battery or batteries should be of the alkaline high power type, since the current drain will be found to be relatively higher when compared to microtransmitter current drain the power output of this device is somewhat proportional to the current drain and so therefore both may be decreased by.
The circuit built around transistor t1 bf494 is a basic lowpower variablefrequency vhf oscillator. A fm transmitter can cover maximum distance, here showing a long range fm transmitter circuit diagram that can cover the distance upto 5 km and with the power of 1 w. Further, to increase the directivity and so also the power density, you may assemble the. With yagi antenna, looking like early days of tv antenna with aluminum pipes at both at transmitter and receiver end looking each.
If any transmitter circuit have consist rf amplifier stage, oscillator stage then the output power of that ckt provides good power signal. This fm transmitter project circuit result is very good but some time frequency needs to adjust at receiver. Simple solar powered long range fm transmitter circuit diagram. The use of transmitters which have a more powerful output than the fleapower are sometimes required when there are many obstacles in the path of the surveillance transmitter and monitoring station receiver, or the distance between them is too far so as to make a low powered device feasible. It has a very stable oscillator because you use lm7809 stabilizer which is a 9v stabilized power supply for t1 transistor and for frequency adjustment that can be achieved by using the 10k. Sep 25, 2012 long range fm transmitter circuit diagram. Further, to increase the directivity and so also the power density, you may assemble the ir leds inside the reflector of a torch. If used voltage level of the power supply more than 10v. This circuit is somewhat different from the previous fm transmitter circuit. Bf494, fm transmitter, fm transmitter circuit, fm transmitter diagram, long range fm transmitter 2w rf amplifier with mosfet lf2810a. This longrange fm radio transmitter has an additional rf power amplifier stage, after the oscillator stage. It has a very stable oscillator because it uses lm7809 voltage regulator which is a. A resistor and capacitor are externally connected to the pin 2 and pin1 respectively, short with pin 3 of 4047 ic.
For better results, assemble the circuit on a goodquality glass epoxy board and house the transmitter inside an aluminium case. Long range transmitter circuit 2 to 5 km range homemade. The power of the fm signal from the oscillator is then amplified using a power amplifier to produce a low impedance output, matching that with the antenna. The proposed long range transmitter circuit really is very steady, harmonic free design which you can use with standard fm frequencies between 88 and 108 mhz. High quality long range fm transmitter fm transmitter. Long range fm transmitter fm transmitters, electronic.
It has a very stable oscillator because you use lm7809 stabilizer which is a 9v stabilized power supply for t1 transistor and for frequency adjustment that can be achieved by using the 10k linear potentiometer. Here we will learn the basics of rf module and how to use it as a standalone rf transmitter and receiver. Long range fm transmitter circuit,2 km 88108 mhz vhf. Cable is also equally important depending upon the type of antenna.
The circuit helps us to increase the range of transmitting ir rays. Oct 16, 2010 this circuit is a circuit diagram fm transmitter. Components required for fm transmitter circuit are modulator, oscillator, rfamplifier, audio preamplifier, microphone and antenna. This circuit requires only one power supply 9v only. Failsafe long range fm transmitterxtreme series fsx05bfcc certified. The circuit diagram of this project is some hard, but can made with patience and careful connection.