I occasionally think of what possible things might have been sent over this microwave radio. When I was in Germany in the army we had microwave telecomm links on the tops of hills to connect our hawk missile sites to our headquarters. We had the voice channels connected to our switchboard and if you were
(Read More…)
Short biography of a person who no one has heard of. AT&T Laboratory. https://www.facebook.com/story.php?story_fbid=pfbid02Z8YZmJkZayE39EnnnDdstGH29WYeFpzFAKuKC84nTWA5G8H5s4bi2mv9kvfmrxpxl&id=61585440005434&post_id=61585440005434_pfbid02Z8YZmJkZayE39EnnnDdstGH29WYeFpzFAKuKC84nTWA5G8H5s4bi2mv9kvfmrxpxl&mibextid=NOb6eG
The used a cassette recorder to store the photo and play it back. https://spectrum.ieee.org/first-digital-camera-history?fbclid=IwdGRzaAPVVKFjbGNrA9VS7mV4dG4DYWVtAjExAHNydGMGYXBwX2lkDDM1MDY4NTUzMTcyOAABHmbAC3KQ45zuuvHG-fgR6vTCncLee1hqvshLQ0ImklaCVZqVRjvVEz2FdmeY_aem_eXezm2tGP2Rnsz_HIO7IEQ
Uses a 12 key keyboard and texts like an old Nokia phone with multiple keypresses. http://www.technoblogy.com/show?2AON&fbclid=IwQ0xDSwL88ShjbGNrAvzr1WV4dG4DYWVtAjExAAEeX19OxuYe1QO8mrox71F6Zl_KCUppukTfJn3iSrHyEVT51xLwOmz2jhPHLKY_aem_is4HJCST113TNXDXWaTXGw
https://morsecode.world/international/translator.html
Derek Veritasium shows us how QR codes work. He pronounces the a in Veritasium like the a in tassel. https://www.facebook.com/reel/2506467346230147?mibextid=9drbnH&s=yWDuG2&fs=e
This short uses a CD4026, a 7 segment display, 9V battery, some resistors, an IR LED and a CdS photocell or phototransistor. Break the IR beam and the display advances to the next digit. https://www.facebook.com/reel/525596709839365?mibextid=9drbnH
This circuit is used for converting an analog signal into a digital pulse stream. Such things as class D audio amplifiers, servo amplifiers, A to D converters, or sending an analog signal across a fiber optic link. The Schematic and explanation here in this webpage. https://lrak.net/wiki/555_Delta-Sigma_Modulator.html The output signal is shown as audio modulated onto
(Read More…)
I’m still trying to figure out what good it will do. https://www.facebook.com/reel/1346635789305871?mibextid=9drbnH
SpaceX Reveals 8,000 satellite to satellite laser links. https://www.tesmanian.com/blogs/tesmanian-blog/starlink-video#:~:text=The%20’space%20laser’%20feature%2C,Gateway%20ground%20station%20on%20Earth.
