How to make home FM transmitter?
Hello friends, how are you all? Come on everyone is fine. I wish you all the best. Welcome to today's blog from TechPark. I hope you will be able to know and learn something new from my blog today. Let's start the discussion in detail.There are many tutorials on how to make a mini FM transmitter available on Google Ghat, but since there is no such complete tutorial on Techpark. I sat down to write (I am really writing while sitting; sometimes I write while lying down).
What is an FM transmitter?
An FM transmitter is a device that produces a frequency output in a certain range (eg 87.5-108 MHz); This frequency reaches your FM radio and you can tune in to a specific channel (frequency). Simply put, an FM transmitter is an FM transmitter.
Commercial FM stations have powerful FM transmitters. Personally, the use of long distance FM transmitters is illegal, so today we will talk about mini FM transmitters, so let's go.
Q1 = BC457 [can also use synonym transistors such as BC548 or n-p-n transistors]
C1 = 102 pf
C2 = 22 pf-100pf
R1 = 330 ohm
R2 = 4.7 k ohm
VC1 = 0-100 pf [This is the variable capacitor; It is also known as trimmer or tumor]
L1 = 0.1 uH [induction coil]
MC1 = condenser mic
BAT1 = 9v battery
Now connect like the following circuit [you can use Vero board or plastic board if you want]
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| Fm circuit |
The above circuit is very simple and can be made for less money [should be within 50 rupees without battery].
Some topics:
All ceramic capacitors and all registers will be quarter watts. Many people fail to transmit even after successfully making the circuit because they cannot make the L1 well. Very good if you can make the tank coil by measuring the induction, if that is not possible then make 8-10 turns of 22 gauge copper insulated wire in a pencil and make sure that the two legs are parallel to each other.
The condenser mic can often have a +/- sign, but no problem. You can use 25-30 cm long copper wire as an antenna. When the circuit is complete, connect the battery and turn on your FM radio and auto tune; If you come to a certain place and make a show sound, you can talk on MIC1 and generate sound and see if it can be heard on your receiver [on FM radio] ?! If you can't hear, turn the trimmer on and set it to a certain frequency. Enjoy your homemade mm FM transmitter!
Note:
Ernestly it is not a professionally FM transmitter and can be used in a science project or in a specific area of the house; It is not possible to say the exact range because it is a relative matter but I hope you can transmit the signal at a distance of 100 meters.
It is going on intentionally, so don't use it to play twelve of the neighbor's radio signals, because we are the ones who do the right thing by getting the right one.
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| fm circuit |
After reading so many posts, it is normal for you to be upset after hearing such a low range, so I gave you the diagram of the 1km FM Transmitter circuit; Hope you are happy this time [Component detail is given in the diagram.
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