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Digitally controlled FM transmitter

Digitally controlled FM transmitter

This transmitter is PLL controlled and still very easy to build. Frequency is set with 4 buttons and a LCD display show you the frequency. The smallest step size is 50kHz and the transmitter will work from 88 to 108 MHz.
A transmitter needs several units to work properly, so instead of mixing all into one huge project, the author will divide the project into 4 steps. Each step will result in a self functional unit. In the end of this journey, you will be able to link the steps together into a very powerful FM transmitter.
Part I (Digitally controlled FM transmitter with 2 line LCD display)
Part II (FM PLL controlled VCO unit)
Part III (1.5W power amplifier)
Part IV (7W power amplifier under development)

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