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✧✦✶✷Catherine✷✶✦✧

if you think about it, a heating radiator with a thermostat is a type of software defined radio

@whitequark the first mass-produced software defined radio was the car ECU

@whitequark *points to homeothermic creature* radio!

@chrisvest @whitequark I think you just took the alignment from true--neutral to chaotic-evil.

@KatS @whitequark I brought my thermoreceptors within range of my kitty.
Signal: snoot=cold, belly=warm.

@whitequark
*remembers horrible terrible contraptions by terahertz guys*
That's a lot to unpack so let's throw away the whole suitcase

@whitequark@mastodon.social If you run this process in reverse, it's definitely a legitimate radio receiver for many lab applications.

@whitequark@mastodon.social Just found this example from an RF/microwave metrology textbook in my old archive.

@lanodan @niconiconi @whitequark waveguide filled with a wedge of dielectric? If not .. sorcery always an option, it’s RF.

@niconiconi @whitequark I was baffled for a minute how they get the water to form into a wedge shape 😔

@niconiconi
What in the black sorcery world this device achieves
@whitequark

@magnetic_tape@infosec.exchange @whitequark@mastodon.social measure and calibrate the received radio signal power using the water temperature.

@niconiconi @whitequark a downscale version of the Heathkit "Cantenna"!

@whitequark covertly transmitting one 7-bit ascii character per week, to an observer with a thermal camera, by heating or not heating my flat every night

@gorplop you could use depth of modulation to transmit

this is completely serviceable

0.5 degC means 0, 1 degC means 1

@whitequark @gorplop This is the type of content I am here for 👍

@gorplop @whitequark might need to reduce the bandwidth slightly to have start and stop bits for framing.