FM Circuits

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FM communication circuits.

500 mW FM transmitter circuit - A fun to build 500 milli-watt fm transmitter circuit

Are you looking for a somewhat difficult FM transmitter to build. This one might be right up your alley. This is a 500 MW FM transmitter. While 500 MW doesn't sound like a lot of power, that is a good deal more than most of the FM transmitters listed on this site. I've listed the details at the end of this article. Before building, check your building checklist, do you have:

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Circuits: 

VHF FM transmitter Circuit

This VHF FM transmitter circuit uses a Hartley type oscillator and is best build with an ECM type microphone insert:

(source - http://www.zen22142.zen.co.uk/Circuits/rf/davidtx.htm)

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Circuits: 

Low Power FM transmitter - 2 transistor FM transmitter

This is a low power 2 transistor fm transmitter. It is not the best quality transmitter but doesn't take too long to build and doesn't have too many parts. If you would like a better fm transmitter, then look for one of the more complext ones listed here.

This fm transmitter takes about 20 parts and is powered by a 9 volt battery. It can be affected by the electricity in a person's body, so that being said, this does not make for a good personnel microphone or bugging device.

(source - http://www.zen22142.zen.co.uk/Circuits/rf/2bjttx.htm)

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Circuits: 

High Power FM Transmitter

Here is a high powerful FM transmitter circuit.

It also includes good instrucitons on building an FM transmitter circuit. Everyone needs some good instructions.

(source - http://w1.859.telia.com/~u85920178/tx/bug5.htm)

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Circuits: 

Stereo FM transmitter circuit

This stereo FM transmitter circuit can be used to transmit music around your home from your stereo system. It accepts two stero inputs. One for the left and one for the right speaker.

Here are some more details on the circuit (http://electronics-diy.com/Single_Chip_FM_Transmitter.php)

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Circuits: 

2 Transistor FM Transmitter Circuit

Here is a two transistor FM transmitter circuit. I did some experimenting with this circuit and was initially looking for an FM transmitter that had a bit more power.

However, that being said, this dones't have many parts. If you transistion from this two transistor FM transmitter to a 4 transistor, you will get a bump up in power. Check out my site here for some strong FM transmitters. Here is the source for this article (http://www.zen22142.zen.co.uk/Circuits/rf/2bjttx.htm)

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Circuits: 

1.5 Volt FM Transmitter Circuit

This 1.5 volt transmitter circuit is a very basic FM transmitter circuit. You can build it with a minimum of components.

These are fun projects to build with your kids so that they can see how fm transmitters work. FM transmitters have many similarities. A place for input of the signal and then different options for rebroadcast of the signal.  The nice thing about this transmitter is that it doesn't take up too much space.

(source - http://www.cappels.org/dproj/FMdist/fmdis.htm)

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Circuits: 

High Quality FM Transmitter Circuit - Useful for transmitting music around your house

This FM transmitter circuit is useful for transmitting music around your house. It has adjustable power and does not take many parts. The circuit has two parts, a transistor circuit and an amplifier circuit. There is also an included circuit for a power meter that you can hook up.

I think this circuit does a good job at keeping the circuit noise low while also giving you options on power output.

(source - http://electronics-diy.com/tx300.php )

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Circuits: 

Pirate Radio FM Transmitter Circuit - The Veronica radio Circuit

The concept of pirate radio is not a new one. For years people have been creating illegal transmissions here in the US and most notably in other countries. Even with efforts to clean up the ham band, there are still quite a few transmitters out there that should not be. However, these transmitters serve a useful purpose.

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200 MW FM Transmitter Circuit - Transmit music through your house with this FM transmitter circuit

You ever have one of those times when you are sitting in the living room trying to hear music coming from the kitchen or vice versa but you can't hear it. Then you go to turn up the music in the kitchen and it becomes too loud for those in the kitchen but it sounds good in the living room.

What you need to build is an FM transmitter to transmit that music throughout your house. Sound difficult? It might be the first time to build it, but with these instructions and a few parts, you will be well on your way.

(source - http://electronics-diy.com/tx200.php)

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