Mini FM transmitters take place as one of the standard circuit types in an amateur electronics fan’s beginning steps. When done right, they provide very clear wireless sound transmission through an ordinary FM radio over a remarkable distance. I’ve seen lots of designs through the years, some of them were so simple, some of them were powerful, some of them were hard to build etc. Read the rest of this entry »

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This miniature transmitter is easy to construct and it’s transmissions can be picked up on any standard FM radio. It has a range of up to 1/4-mile (400 meters) or more, depending on the line-of-sight, obstructions by large buildings, etc. It is great for room monitoring, baby listening, nature research, etc.
L1 is 8 to 10 turns of 22 gauge hookup wire close wound around a non-conductive 1/4-inch diamter form, such as a pencil.
C4 is a small, screw-adjustable, trimmer capacitor. Read the rest of this entry »

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Here is a small project about FM receiver that you can built with a little cost. The schematic below

This is a very simple kind of receiver. The dificult point is to get the inductor coil, i think there a no electronic store that sell this coil. so you must make it by yourself

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Below i have finished develop a mini fm transmitter that work fine at frequency 88 – 108 MHz. This is a simple FM Transmitter that can be used in a small city (2-4 Km). Here is the schematics

mini fm transmitter

if you could not understand please feel free to comment here

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