3 ms·
At my highschool, we had FM radio transmitter on the other side of street. Pretty often you could hear one of the stations in computer speakers in library, so F
by yetihehe 2y ago
At my highschool, we had FM radio transmitter on the other side of street. Pretty often you could hear one of the stations in computer speakers in library, so FM radio can be detected by simple analog circuits.
- ableal 2y agoYou need a PLL somewhere, because the audio signal is encoded in the frequency shift of the carrier (e.g. 98 MHz +/- 150 kHz). Or maybe you were getting a leak from the audio signal before modulation, e.g. via power lines or something.