I have the following circuit for a simple FM transmitter.
I want to replace the electret microphone with a simple tone generated by an Arduino (or equivalent) that will be broadcast over FM radio.
1) Is this possible to do?
2) How would I go about doing this? (E.g. will a PWM signal from a digital I/O port on the Arduino work?)
3) Maybe there is a simpler way to broadcast a simple tone over FM radio?...