This should put out the few miliwatts that could be amplified.

The principle of this circuit is to use the generator frequency circuit. This circuit is suitable for learning only. Old FM receiver circuit using transistor. But works well, although the sensitivity is poor. This will not propogate more than one room i would say. Even both circuits are small FM radio receiver circuit. If you have any queries, feel free to comment. The gain of the amplifier is controlled by adjusting variable resistor. This FM stereo matrix generator circuit can be used to produce stereo modulation for a variety of mono FM transmitters. Here LM386 is used to amplify the audio signal received in order to drive the speaker. You can adjust the volume by tuning variable resistor. From its generation to modulation, the wave suffers minimal. You can tune the frequency by tuning Variable capacitor. While it is useful for many types of audio test tone generation, the circuit is specialized for the purpose of aligning anFM Stereo Modulator, like the type. Out of many methods of frequency generation, this tutorial covers one of the simplest and most efficient circuits. Along with 555 IC timers, the circuit is designed around a Wien Bridge Oscillator circuit and a clamping circuit. This is prone to harmonics with out the chip and a filter though. This tutorial explains circuit designing using a 555timer to generate a frequency modulated wave.

Here you will all find the circuits and theories behind radio circuits which are simple to follow.Īs you can see above, there is a coil with two tuning diodes(mv209, 2 x bb105 or similar may work too) (find, the veronica 1 watt guys, similar tuning deal) the mc1648 chip is a stabiliser type chip regulated by the 5v zener, although you will find that this was quite a stable circuit without if the circuit ran off say a 9v regulator, the earliest model i can think of was a kids c.b circuit and then the 3w pantek came from that (good sound, rubbish harmonics but stable). to more elaborate transmitters such as V7b and v7 Hi folks, for those of you who want to look at a good site, i suggest (ultimate site for learners and experienced alike.) Dont send him silly questions though.

Fm stereo generator circuit