Kelvin n0mql EN35ld on Nostr: Here's a #HamRadio idea that goes a bit beyond radio. Audio can be used to modulate ...

Here's a #HamRadio idea that goes a bit beyond radio.

Audio can be used to modulate movement/wiggle of a laser, or intensity. Spies can point a laser at your window & hear you talk inside your house, from across the street.

So, point a laser at a water tower a mile away, modulate it with FT8 or PSK31 tones, & someone else with a camera decodes it.

Possible?