Visha Electronics carries a very low cost FM transmitter kit based around BF494 NPN Bipolar Junction Transistor. The kit has a condenser microphone to pickup sound. A variable capacitor is also present to tune the transmission frequency anywhere in the 88-108 MHz range. The transmitted signals can be picked up by any stand radio receiver. A simple receiver circuit can also be built, like the one shown here.
![](//lh4.ggpht.com/_57WjJKbJtcc/S_4Sti77n9I/AAAAAAAACiY/cDbUld0RbJA/s400/Ultra%20Miniature%20FM%20Transmitter.jpg)
![](//lh5.ggpht.com/_57WjJKbJtcc/S_4StPTSdqI/AAAAAAAACiU/ZNA-ZZff21Q/s400/Kit%20contents.jpg)
![](https://lh5.googleusercontent.com/-XqSJuKTqWf0/Ty0Sf8YQxhI/AAAAAAAAGKE/sdzmoOfwVCc/s400/PCB%2520Top.jpg)
![](//lh6.ggpht.com/_57WjJKbJtcc/S_4StE2n2iI/AAAAAAAACiQ/bxmasJKBR44/s400/Assembled%2002.jpg)
![](//lh6.ggpht.com/_57WjJKbJtcc/S_4St-mwrTI/AAAAAAAACic/yyCCiDfllMQ/s400/FFT2.png)
Please visit http://www.vishaworld.com for details on more such kits. Students are invited for workshops/courses at our LARE Learning Center for an opportunity to assemble and experiment with such kits.
![](http://lh4.ggpht.com/_57WjJKbJtcc/S_4Sti77n9I/AAAAAAAACiY/cDbUld0RbJA/s400/Ultra%20Miniature%20FM%20Transmitter.jpg)
![](http://lh5.ggpht.com/_57WjJKbJtcc/S_4StPTSdqI/AAAAAAAACiU/ZNA-ZZff21Q/s400/Kit%20contents.jpg)
![](https://lh5.googleusercontent.com/-XqSJuKTqWf0/Ty0Sf8YQxhI/AAAAAAAAGKE/sdzmoOfwVCc/s400/PCB%2520Top.jpg)
![](http://lh6.ggpht.com/_57WjJKbJtcc/S_4StE2n2iI/AAAAAAAACiQ/bxmasJKBR44/s400/Assembled%2002.jpg)
![](http://lh6.ggpht.com/_57WjJKbJtcc/S_4St-mwrTI/AAAAAAAACic/yyCCiDfllMQ/s400/FFT2.png)
Please visit http://www.vishaworld.com for details on more such kits. Students are invited for workshops/courses at our LARE Learning Center for an opportunity to assemble and experiment with such kits.
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