I remember playing with this back in college. IIRC it works by using a GPIO pin that’s normally used for outputting a pulse width modulated signal. By frequently (and cleverly) changing the duty cycle it is able to output something that looks somewhat like a frequency modulated signal.
yes I think so - and thanks for the links - the history of pulse width modulation is an interesting read. It’s also quite convenient that the pi outputs a signal at 100MHz by default, right in the middle of the commercial FM band
I remember playing with this back in college. IIRC it works by using a GPIO pin that’s normally used for outputting a pulse width modulated signal. By frequently (and cleverly) changing the duty cycle it is able to output something that looks somewhat like a frequency modulated signal.
yes I think so - and thanks for the links - the history of pulse width modulation is an interesting read. It’s also quite convenient that the pi outputs a signal at 100MHz by default, right in the middle of the commercial FM band