Problem:
Need to send digital data to remote cable boxes cheaply with size limitations. Typical 19" rack mount modulators not acceptable.

Solution:
Small FSK modulator based on standard PLL chips utilizing a small 8 pin PIC micro to configure frequencies.

Problem:
Need to eliminates cassette adapters for MP3 play back in cars.

Solution:
Micro FM Stereo transmitter with PLL (Phase Lock Loop), provides stable, low power, quality stereo sound without wires. Size permits installation inside portable CD walkman, or an IPAQ sleeve.