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Simple FM Transmitter Circuit

2015-01-09 21:55  
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Simple FM Transmitter Circuit

Thissimple FM transmitter circuitwas built using a transistor with a transmission distance of about 300m around your home. It’s very easy to be constructed in which only consists of the mike audio modulation, and FM oscillator that operate at the base frequency of 100 MHz.

The FM transmitter is very likely built by a novice who wants a chance to experiment with frequency. Although it only has a very low output power of about 1-5 mW, but has a useful range. It’s also useful for sending audio information for a particular application.

Simple FM Transmitter Circuit Diagram

For good results should be assembled circuit on a single sided PCB. This FM transmitter can be operated using battery voltage 3 – 6V. Use a wire antenna is considered sufficient to emit a signal, but you should use a length of wire about a quarter wavelength.

Simple FM Transmitter Circuit Diagram

Simple FM Transmitter Circuit Diagram

Tips for getting a steady signal, cut component leads as short as possible. After the audio modulator assembled properly proceeds to the oscillator and also serves as the final. Determination of the frequency is determined by a combination of LC on the transistor collector. Rotate the trimer capacitors to obtain the desired frequency signal on the receiver, or to stretch the spacing of the coil windings L.

You can use any type other than type transistor VHF transistor in the schematic diagram. Most parts of the RF transistor VHF FM receiver can be used for this. Use the type of NPO capacitors when needed, especially for the LC network.

I think it’s very easy to do your experiment, please proceed to the frequency of the FM broadcast frequency band. Not recommended for strengthening the transmission power, because it will cause interference with other frequencies, and this may violate any applicable laws in your state.

These circuits may be useful for your RF applications, but it can be developed further because it is just asimple FM transmitter circuit.


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