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Radio Shack EC-4000 Programmable Handheld Electronic Calculator

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Radio Shack introduced this ...
Hackaday

ham radio

When [101 Things] didn’t want to copy Morse code, he decided to build a Pi Pico system to read it for him. On the face of it, this doesn’t seem particularly hard, until you look at the practical ...
IEEE

Multiband Distance Measuring Equipment, Traffic Collision Avoidance System and Radio Altimeter Antenna for Avionics Applications

Abstract: A multiband antenna is presented for aircraft communication of traffic collision avoidance system (TCAS), distance measuring equipment (DME) and radio altimeter (RadAlt). This single antenna ...