Anyway, probably sound is the best and cheapest mean to transfer the info on such a short distance (is the distance an open space or are there buildings?). It would be easy to create a device that can separate sound based on frequency or loudness (Arduino hooked to a microphone). If it is only a bit it needs to identify low frequency from high frequency and you got your 0 and 1.
On Tue, Dec 28, 2021 at 5:51 PM Giovanni Santostasi <gsantost...@gmail.com> wrote: > What is the rate of transfer of information? Only a single bit one time? > > > On Tue, Dec 28, 2021 at 5:43 PM Robin <mixent...@aussiebroadband.com.au> > wrote: > >> In reply to Giovanni Santostasi's message of Tue, 28 Dec 2021 17:35:35 >> -0800: >> Hi, >> >> Very inventive. :) However no human intervention possible. Method >> preferably electronic. >> >> >An arrow with a message written on a piece of paper wrapped around the >> >arrow. 50 meters should be a relatively easy shot. >> >Giovanni >> > >> >On Tue, Dec 28, 2021 at 5:23 PM Robin <mixent...@aussiebroadband.com.au> >> >wrote: >> > >> >> In reply to Robin's message of Wed, 29 Dec 2021 12:21:14 +1100: >> >> Hi, >> >> >> >> I should add that the transmitter has no mains connection thus may at >> best >> >> be battery powered. >> >> >> >> Regards, >> >> >> >> Robin van Spaandonk <mixent...@aussiebroadband.com.au> >> >> >> >> >> Regards, >> >> Robin van Spaandonk <mixent...@aussiebroadband.com.au> >> >>
