We have a project to design a wireless full duplex intercom circuit using frequency modulation technique. I've searched the web for designs and I have come up with these:
Our plan is to create two pairs of transmitters and receivers, tuning the trimmer capacitor to a blank channel (says on each design that it should transmit/receive between 88 MHz to 108 MHz), each with different center frequencies (one pair could be tuned to 100.5 MHz and another to 93.5 MHz, for example)
So our questions are these.
- What is the L2, C6, and C7 for? (Transmitter)
- What would be the transmitting range of the transmitter?
- Would my plan work?
- Any tips to improve the design?