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1. ✧✦✶✷Catherine✷✶✦✧ (whitequark@mastodon.social)'s status on Friday, 29-Nov-2024 17:29:53 JST ✧✦✶✷Catherine✷✶✦✧

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

   • polprog68k likes this.
   • polprog68k (gorplop@pleroma.m68k.church)'s status on Friday, 29-Nov-2024 21:11:51 JST polprog68k

     in reply to
     @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
   • ✧✦✶✷Catherine✷✶✦✧ (whitequark@mastodon.social)'s status on Friday, 29-Nov-2024 22:10:34 JST ✧✦✶✷Catherine✷✶✦✧

     in reply to

     • polprog68k

     @gorplop exactly!

   • ✧✦✶✷Catherine✷✶✦✧ (whitequark@mastodon.social)'s status on Friday, 29-Nov-2024 22:10:34 JST ✧✦✶✷Catherine✷✶✦✧

     in reply to

     • polprog68k

     @gorplop you could use depth of modulation to transmit

     this is completely serviceable

     0.5 degC means 0, 1 degC means 1

     polprog68k likes this.